alcan - the 1966 installer handbook for alcan wire and cables wireman guide 1996

THE 1996

INSTALLERS

HANDBOOK

FOR ALCAN

WIRE AND

CABLES

1Alcan has a long history in the electrical conductor field. Thecompany started manufacturing electrical conductors before the turnof the century and, in the intervening ninety-five years, Alcan hassupplied more than three million kilometres of conductor to theelectrical industry in Canada and around the world.

Today, with cable plants spanning the continent, Alcan is a majorfactor in the wire and cable market in Canada. Alcan produces bare,covered and insulated conductors in NUAL, aluminum and copper,for carrying electricity from the generating station to the utilizationpoint. So when you are thinking about ACSR, service cable, buildingwires and armoured cables, think about Alcan.

About Alcan

Table of ContentsEngineering Information ..................................................................3Alcan Armoured Cables ...................................................................4Fire Test Standards ..........................................................................7Splicing and Terminating Conductors ...........................................12Single- vs Multi-Conductor Constructions

General .......................................................................................14Voltage Drop...............................................................................15Magnetic Fields and Harmonics .................................................16Circulating Currents ...................................................................17Equipment Certification Implications..........................................18

Installation of Single-Conductor AC90, ACWU90 andTECK90 Cables...........................................................................19

Recommended Configuration for Parallel Operation ofSingle-Conductor Cables in Free Air..........................................21

Ampacities and Installation Configurations for SingleConductors Buried in the Earth...................................................24

Ampacities and Installation Configurations for SingleConductors in Underground Ducts.............................................26

C.E.C. APPLICATION RULESSection 4: Conductors

Rule 4-004: Ampacity of Wires and Cables ................................28Rule 4-008: Sheath Currents ......................................................29

Section 12: Wiring MethodsRule12-012: Underground Installations .....................................30Rule 12-106: Multi- and Single-Conductor Cables....................31Rule 12-118: Termination and Splicing ofAluminum Conductors..............................................................31

Rules 12-600 - 12:618: Armoured Cable Work Rules ................33Rules 12-2200 - 12-2212: Cables in Trays.................................36

TABLESAllowable ampacities and Conduit Fills

(*from C.E.C. Tables 1-4) ...........................................................40Tables 5a/5b/5c: Correction Factors..............................................42Table 5d: Current Rating Correction Factors..................................44Table 8: Percent Conduit and Tubing Fill .......................................44Table 9: Cross-sectional Areas of Conduit and Tubing..................45Table 10: Dimensions of Insulated Conductors .............................46Table 19: Conditions of Use...........................................................48Tables 20/21/22: Spacings and Support .......................................60Table 16: Min. Size of Bonding Conductors ..................................61Tables 17/18: Min. Size of Grounding Conductors........................62Dimensions of Stranded Bare Conductors.....................................64Tables D6/D7: Tightening Torques.................................................66GLOSSARY ...................................................................................68

3NUAL

The term NUAL refers to Alcan manufactured aluminum alloyconductor material, designated as ACM in the Canadian ElectricalCode. NUAL is produced in rod form and afterwards drawn to theappropriate wire diameter for fabrication into solid or strandedconductor building wire and cable.NUAL is CSA-certified in finished building wire form, as well as inraw material form as rolled rod for processing by cable fabricatorsinto finished wire and cable. Meeting all of the physical and electricalrequirements of aluminum to CSA and UL standards, NUAL inaddition provides superior connectability in both solid and strandedconductor form.NUAL is CSA-certified up to 2000 kcmil and is mandatory in sizes12 and 10 AWG solid. NUAL or aluminum can be used in sizes largerthan 8 AWG. Alcan supplies six product lines; overhead service cableis 1350 aluminum, all others are NUAL.

l Thermosetting wires (RW90 XLPE, RWU90 XLPE) to CSA Standard C22.2 No.38

l Non-metallic Sheathed Cable (NMD90) to CSA Standard C22.2 No. 48

l Armoured Cable (AC90, ACWU90) to CSA Standard C22.2No. 51

l TECK Cable to CSA Standard C22.2 No. 131l Thermoplastic Wires (TW75) to CSA Standard C22.2 No. 75l Service cables for underground and overhead installations

(USE-I, USE-B, NS-1, NSF-2) to CSA Standard C22.2 No.52Wiring methods described for NUAL are equally applicable toaluminum and copper conductors. All of the aforementioned cabletypes except overhead are made in NUAL conductors as a standardconstruction, in sizes ranging from 8 AWG to 2000 kcmil.

Engineering Information

Alcan Armoured CablesAC90

Available sizes NUAL COPPER SPECIFICATIONSingle-conductor 1/0 AWG to 2000 kcmil CSA C22.1 No. 51Multi-conductor 8 AWG to 750 kcmil 14 AWG to #6 AWG FMRC Class 3972 Fire Test GP-1

FT4 Rated: Vertical Cable Tray Test

Alcan AC90 Single-Conductor Cable

Concentric NUAL or Copper Bonding Conductor

NUAL or Copper Phase Conductors

Interlocked Aluminum Armour

RW90 XLPE Insulation

Alcan AC90 Multi-Conductor Cable

NUAL or Copper PhaseConductors

NUAL or CopperBonding Conductor

InterlockedAluminum Armour


5ACWU

Available sizes NUAL SPECIFICATIONSingle-conductor 1/0 AWG to 2000 kcmil CSA C22.2 No. 51Multi-conductor 8 AWG to 750 kcmil FT4 Rated: Vertical Cable Tray Test

CSA C22.2 No. 174 Hazardous LocationsFMRC Class 3972 Fire Test GP-2

ACWU90 Single-Conductor Cable



ConcentricNUAL BondingConductor

FT4-rated PVC Jacket

NUALPhaseConductors

ACWU90 Multi-Conductor CableRW90 XLPE Insulation Interlocked Aluminum ArmourNUALPhase

Conductors

FT4-rated PVCJacket AG 14

NUALBondingConductor

ALCAN B 3/C 500 KCMIL AL ACM NUA

TECK

Available sizes NUAL COPPER SPECIFICATIONSingle-conductor 1/0 AWG to 2000 kcmil 1/0 AWG to 1000 kcmil CSA C22.2 No. 131 (TECK)Multi-conductor 8 AWG to 750 kcmil 14 AWG to 750 kcmil CSA C22.2 No. 174 (Hazardous Locations)

FT4 Rated: Vertical Cable Tray TestFMRC Class 3972 Fire Test GP-1 (unjacketed) GP-2 (jacketed)

TECK90 Single-Conductor Cable

90C PVC LGEinner jacket

90C PVC LGE inner jacket

FT4-ratedAG14PVC Jacket

NUAL orCopperPhaseConductors

InterlockedAluminumArmour

Non-hygroscopicfiller

TECK90 Multi-Conductor Cable


NUAL orCopperBondingConductor


NUAL orCopperPhaseConductors

FT4-ratedAG14PVC Jacket

Non-hygroscopicfiller

RW90 XLPEInsulation

ConcentricNUAL orCopperBondingConductor

ALCAN B 1/C 750 KCMIL AL A ALCAN B 3/C 750 KCMIL AL

7TABLE 1Classification Application Test Procedure Standard Criteria

FT1 The vertical test is a residential As Clause 4.11.1*, Burning shall cease within 60 s,use or commercial buildings in Vertical Test and not more than 25% of theconduit and is similar to the extended portion of the indicatorUL VW-1 test. shall be burned.

FT2 The horizontal test is generally As Clause 4.11.2*, The charred portion of theaccepted as not being as severe Horizontal Test specimen shall not exceed 100 mma test as the FT1 vertical. It is measured from end to end.required for all flexible cords andis optional for appliance wire.

FT3 Dropping of flaming particles test As Clause 4.11.3*, Burning particles from theis a classification for cross linking Burning Particles specimen shall not cause thestructures such as XLPE (Dropping) Test newsprint to ignite (flame).insulation but is basically not considered a flame spreadclassification.

Fire Test Standards

TABLE 1 continuedClassification Application Test Procedure Standard Criteria

FT4 The vertical flame test in cable As Clause 4.11.4*, The length of char shall nottrays is general purpose use Vertical Flame Test exceed 1.5 m.wire or cable and is comparable Cables in Cable Trayto the UL vertical tray flame test.

FT5 Flame resistance test is normally As Clause 4.11.5*, The length of the burned areaused on portable cables for use Flame Resistance Test shall not exceed 150 mm andin underground workings or Normally used on shall not continue to burn formines such as type G-GC cable. Portable Cables for use more than 4 min. following the

in Underground Workings. flame resistance test.

FT6 Horizontal flame and smoke test National Fire Protection The maximum flame spread shallcables for use in air handling Association 262-1985. be 1.5 m. The smoke densityspaces (plenums). This test is shall be:identical to UL 910. (i) 0.5 at peak optical density and

(ii) 0.15 at maximum averageoptical density.

* Reference CSA Standard C22.2 No. 0.3-M1985

Fire Test Standards continued

9The CSA Standard for AC90, ACWU90 and TECK90 cables requirethat all cables meet the Vertical Flame Test (FT1 Bunsen burner test)to CSA Standard C22.2 No. 0.3. In addition, a much tougher level ofperformance is specified in the CSA Vertical Flame TestCables inCable Tray to CSA Standard C22.2 No. 0.3.

All Alcan ACWU90 and TECK90 cables meet both these levels offlammability performance. Typical results are shown in the followingtable. Compliance is indicated by the designation FT4 printed on theouter PVC jacket and on shipping tags.

FT4 TEST REQUIREMENT

The char distance must not be greater than 1.5 metres from thepoint of flame impingement.Typical Test Results

Acid GasFlame Evolution

Type Spread % by weightFT4-rated PVC jacket 0.8 m 13Standard PVC jacket 2.5 m 24Note: Alcan does not represent that FT4-rated will not burn or propagate flame otherthan expressly set forth in the above test conditions.

PVC-jacketed cables meeting the FT4 standard are accepted by theNational Building Code for installation in all parts of non-combustiblebuildings, including vertical shafts and return air plenums. The 1994Canadian Electrical Code Part I reflects an equivalent performancelevel requirement, harmonizing the two major installation codes. Note: Check with your provincial building code officials to ensurecompliance with local amendments.The unjacketed construction, type AC90, is not required to meet the FT4test. Its interlocked aluminum armour is considered equivalent toinsulated conductors in metal conduit and is highly resistant to flamespread.

FT1 & FT4 RATINGS

Fire Test Standards continuedAppendix B of the 1994 CEC explains the application of cablesbearing the FT1 and FT4 designations.2-128 The flame spread requirements for wiring and cables inbuildings are located in the 1990 Edition of the National BuildingCode as follows:Combustible building construction .......................ARTICLE 3.1.4.3Noncombustible building construction ......................ARTICLE 3.1.5.17Plenum spaces in buildings ..................................ARTICLE 3.5.4.3The markings for wires and cables meeting the flame spreadrequirements of the National Building Code of Canada (withoutadditional fire protection) are:

FT1 - Wires and cables that are suitable for installation in buildingsof combustible construction; and

FT4 - Wires and cables that are suitable for installation in:(a) buildings of noncombustible and combustible

construction; and(b) spaces between a ceiling and floor, or ceiling and roof,

that may be used as a plenum in buildings of combustibleor noncombustible construction.

Wires and cables with combustible insulation, outer jackets orsheaths that do not meet the above classifications should be locatedin enclosed non-combustible raceways, masonry walls or concreteslabs.Wire and cable passing these tests will be marked FT1 or FT4 directlyon their jackets. They will be suitable for installation in buildings asshown above.

11

FACTORY MUTUAL RATINGS

Alcan type ACWU90 and jacketed TECK90 armoured cables areavailable with a Factory Mutual Group 2 rating and type AC90 andunjacketed TECK90 are available with a Group 1 rating, to save onyour fire protection costs. Both types have been demonstrated towithstand a four-hour firestop penetration test when tested with acommercially available firestop sealant.Products listed by Factory Mutual are identified by markings FMRCfollowed by the marking GP-1 or GP-2 for Group 1 and Group 2listings, respectively. Cables without jackets have FMRC markingsindented on the interlocked armour; cables with jackets carry markingsprinted on the jacket, as well as markings indented on the armour.

L TECK90 XLPE (-40C) 1000V HL FT4 AG14 FMRC GP-2 CSA

WARNINGFLAMMABLE: Non-metallic coverings of electric cable will

burn and may transmit fire when ignited.TOXIC: Burning non-metallic coverings may emit acid

gases which are highly toxic, and dense smoke.CORROSIVE: Emission of acid gases may corrode metal in

the vicinity, such as sensitive instruments andreinforcing rods in concrete.

NOTICE

Purchasers, installers and end-users of cables with non-metalliccoverings should note the following warning:

Splicing and Terminating ConductorsGENERAL

When splicing and terminating either aluminum or copper conductor,care should be taken to ensure service continuity. Alcan Cablerecommends the following procedures for all cable connections:1) Fittings: Use only CSA-approved terminal lugs and

connectors marked AL9CU and AL7CUwhich are suitable for both aluminum andcopper. If the equipment is not approved foraluminum, an approved adapter such as aCoppertail may be used.

2) Insulation: Remove insulation from the conductor end bypencilling; ringing can nick the conductor.

3) Cleaning: Wire brush the exposed conductor end toremove any oxide film. Coat with a suitable jointcompound to inhibit its reformation, thusprotecting the contact surfaces from air andmoisture.

4) Installation: Insert the prepared cable end into the connectoror terminal lug and secure the connection.Ensure that the correct tool and die are used forcompression fittings and that appropriate torqueis applied to bolted connectors.

5) Binding: When connecting solid conductor with a bindinghead screw, make a 3/4 loop under the screwhead and secure.

OUTDOOR ARMOURED CABLE TERMINATIONSFor outdoor terminations on Alcan ACWU90 and TECK90 cables such asconnections to overhead lines or outdoor bus, or where it is permitted todiscontinue the bonding conductor, we recommend the method shownbelow. Typical examples are 1) in service entrances, in both single- andmulti-conductor constructions, where the neutral conductor also servesas the ground path, and 2) in single-conductor feeders rated over 425amps, where the bonding circuit is discontinuous in order to avoid sheathcirculating currents. Care must be taken to seal the cable ends properlyand to solidly bond the armour and bonding conductor wires at the otherend of the cable using a CU9AL or CU7AL rated connector bolted to theequipment enclosure.

Single-Conductor Cables1 Strip back armour and PVC jacket.2 Fold the bonding conductor strands back over the armour.3 Waterproof the whole termination by using CSA-approved wet rated

heat shrink tubing.

Multiple-Conductor Cables1 As step 1 above.2 Cut off the bonding conductor flush with the armour.3 As step 3 above.Note: Care must be taken to seal the exposed conductor by taping it witha self-sealing rubber tape or heat shrink tubing. The goal is to preventwater getting inside the insulation and the cable assembly.SERVICES ABOVE AND BELOW GROUNDAlcan type ACWU90 and TECK90 cable may be used for services both inthe single- and multi-conductor form. Single-conductor services shouldhave all the bonding conductor wires attached to a common lug bolted tothe service equipment using a AL9CU connector.

PARALLEL CIRCUITSFor very large loads it is sometimes economical to parallel two or morecables. When this is done, we strongly recommend that the lengths, sizeand construction of the cables be identical and that multiple barrelled lugsor crimp type flat lugs with separate screws or studs be used.

In order to obtain reasonably good load-sharing among the single-conductor cables, it is important that the impedance of each cable bealmost identical to that of the other cables of the same phase, and forthis reason we recommend the configurations shown on pages 21-23.

`

13

Single- vs Multi-Conductor ConstructionsGENERAL

It is well known and understood that installations of armoured cableare more economical than pipe and wire installations. This is duelargely to the fact that the activities of conduit installation and wirepulling are not required with armoured cable. Armoured cables arereadily available in single and multi-conductor constructions. Thereare various aspects that should be taken into consideration whenchoosing between these two.The attractions of first-cost savings of single-conductor cable mayneed to be tempered with other technical considerations. The first-cost savings may be much less than they first appear, and the integrityof the circuit is subject to some potential pitfalls.l The cost savings from smaller conductors, sized in accordance

with Tables 1 and 3 of the code, are diminished by increasedarmour, bonding conductor, or metal sheath, extra jacket cost, andthe addition of an external bonding conductor in large single-conductor cables.

l The 70% derating for single conductors may call for a higherequipment and cable cost than expected, when compared with the80% derating for multiple-conductor cables. (Code Rule 8-104).

l When comparing single-conductor to multiple-conductor cables,fully account for the end-user energy conservation needs, andensure that all code rules, equipment limitations and healthconcerns have been fully addressed.

Some of these technical concerns are outlined below. If assistance isneeded, do not hesitate to contact your nearest Alcan Cable salesoffice.

COST OF MATERIAL

Recent analyses demonstrate that multi-conductor armoured cablescan be more cost-effective than single-conductor constructions formany installations. While single-conductors can often save first costs,due to higher ampacity ratings, this advantage is partially offset by theextra cost of additional armour or sheath on singles vs only one onmulti-conductor cable.

COST OF LABOUR

Labour is often higher in single-conductor installations. Each phasebeing an individual cable requires all the same handling proceduresas multi-conductor cables which contain all of the phases.

15

VOLTAGE DROPA further effect of single-conductors in longer feeder circuits can beincreased voltage drop. This arises not only on account of the higherresistance of the smaller conductors, but also on account of theincreased spacing between conductors in single-conductor systems.It is a fact that greater spacing increases impedance and inductivereactance, which is the main contribution to voltage drop.The following table demonstrates the relative performance ofmulti- vs single-conductor NUAL conductors in typical circuits.

NUALSize

AmpacityA (table 3)

AmpacityA (table 4)

Max distancefor 3% V drop

Max distancefor 3% V drop

Single-ConductorMAXIMUM DISTANCE ALLOWED FOR 3% VOLTAGE DROP*

Multi-Conductor

1/03/0250350500750

190255330415515670

96108112115118116

174190214223236253

120165215260330405

Maximum distance in metres, not to exceed 3.01% voltage drop.*For 600V, 3 phase, 3 wire system, 90% P.F. using 80% of ampacity.

Single- vs Multi-Conductor Constructions continued

The magnetic fields surrounding single-conductors can extend muchfarther than those surrounding multiple-conductor cables. Concernshave been expressed in some circles that magnetic fields may belinked with cancer. The cautious consultant or end-user may wish toexercise the option of minimizing magnetic field strengths until moredefinitive medical evidence is available.The nuisance effects of the magnetic fields can be both elusive andexpensive to correct. Typical nuisance effects involve the actions ofthe magnetic fields on sensitive electronic equipment, such ascomputers. In extreme cases, shielding and filtering of power suppliesmay be the only way to remedy the situation.The magnetic field from each conductor is nullified by those of theneighbouring conductors in a three-phase system with a pure sinewave form. In a four-conductor cable, the magnetic fields neutralizealmost totally within the cable. However, the fields of singleconductors can extend much farther, depending on the spacingbetween the conductors.

Magnetic fields are amplified in circuits with high levels of thirdharmonic currents and multiples of the third harmonic. These currentsare common today due to electronic devices which chop the waveform of the voltage. One of the unexpected results is that thirdharmonic magnetic fields in each of the three phases are additive, sothe magnetic field surrounding a group of three conductors can bemuch greater than would be expected. This amplified magnetic field iscancelled only by the field from the neutral conductor. In large single-conductor feeders, the neutral conductor is often located a significantdistance from some of the phase conductors, leading to propagationof third harmonic magnetic fields to greater distances. The use ofmulti-conductor cables will eliminate this concern, owing to theirclose proximity.

MAGNETIC FIELDS AND HARMONICS

17

Special precautions are necessary with single-conductor systems, inaddition to those previously mentioned. Accessories which totallysurround single-conductor cables, such as clamps and connectors,must be non-ferrous to avoid magnetic hysteresis and eddy currentlosses, which could lead to major overheating. Third harmoniccurrents will greatly increase the magnetic losses in suchcomponents. The current sharing between parallel conductors of thesame phase must be ensured by attention to phase configurations.Sometimes imbalances in the current sharing can be present due toinherent difficulties in complying with spacing requirements. It isvirtually impossible to balance the third harmonic currents equallywith any type of single-conductor phase configuration, although thisis automatically achieved with 4-conductor cables.

CIRCULATING CURRENTSSingle-conductor feeder circuits rated higher than 425 amps requirespecial measures to avoid circulating currents in the sheath, orarmour and bonding conductor, and massive derating. Non-magneticentry plates are required on the equipment enclosures at the end atwhich the armour and bonding conductor is bonded to the enclosure.The armour and bonding conductor must be isolated from groundedmetal and the outer metal of the other conductors at the other end bymeans of an insulating entry plate. Similarly, the armour sheath mustbe continuously insulated from grounded metal such as cable tray

or struts. This is accomplished with an outer PVC jacket over thesheath or armour. (The outer jacket is not required in dry locations ifmultiple-conductor cable is used.) Further, an external bondingconductor must be provided for the group of single-conductors inthese higher ampacity circuits. This external bonding conductor is anextra cost in the system which is often overlooked.At the remote end of the cable, closest to the point of utilization, thearmour and bonding conductor will carry a significant potentialdifference to ground whenever current flows in the central conductor.If the armour becomes grounded by accidental contact with groundedmetal, a spark can be generated with considerable energy loss an unexpected hazard for maintenance crews or non-electricaltradespeople working in the area. For these reasons, installation ofsingle-conductor circuits in code-defined hazardous locations mustbe avoided. See pages 12 and 13 for single-conductor terminationprocedures.

EQUIPMENT CERTIFICATION IMPLICATIONS

The connection of smaller conductors, as permitted by Tables 1 and 3of the code, has a bearing on the performance of the electricalequipment to which the cables are connected. The smaller conductorsoperate at higher temperatures inside the equipment and their closeproximity compared to the major part of the run does not allow for thesame heat dissipation. Electrical equipment in fact relies to somedegree on the conductors to dissipate heat from the equipment.Underwriters Laboratories Inc., in the United States, has taken astrong position on this practice the certification of the equipmentis voided if it is connected in a manner that differs from the test. Thiswill assume greater importance as more UL-listed equipment appearsin Canada as a result of North American Free Trade Agreement.According to Canadian Electrical Code rules, equipment which iscontinuously loaded is subject to a derating (CEC Rule 8-104):l to 80% when connected to multiple-conductorsl to 70% when connected to single-conductors

In practice, the calculated ampacity for selecting the correct cable andequipment has to be increased by the reciprocal of these factors about 14% higher for the sizing of conductors in single-conductorcircuits. This higher ampacity applies not only to the conductors, butto the equipment as well. In some cases the equipment may need tobe increased in size for single-conductor installations, compared tomulti-conductors, due to the difference in derating factors. The single-conductor choice could turn out to be expensive under someconditions.

Single- vs Multi-Conductor Constructions continued

CIRCUITS RATED UP TO 425 AMPS INCLUSIVE

On any AC system, currents flowing in the centre conductor willinduce small currents in the concentrically applied bonding wires andin the interlocked armour.

For circuit ampacities up to and including 425 amps these inducedcurrents do not affect the cable ampacity and may be neglected. Werecommend terminating the cables as follows: the bonding wires of allcables entering the equipment enclosure should be bunched andconnected to the bonding screw of the terminal (2), the armour ofeach cable should be attached to the entry plate by means of anapproved connector, and the entry plate should be aluminum or someother non-magnetic conducting material (1).

Installation of Single-Conductor AC90, ACWU90 and TECK90 Cables

Aluminum Plate

` `

19

CIRCUITS RATED OVER 425 AMPSFor single-conductor cables rated over 425 amps, the induced currentin the concentric bonding conductor is potentially large andprecautions must be taken to interrupt it. It is recommended that thecable at one end, preferably the supply end, enter the panel by meansof an aluminum plate (3) and that the bonding wires from each cablebe connected together in a common lug and bonded to the metallicenclosure or grounding bus of the equipment (4). At the other end, thecables should enter the panel through a non-conducting plate (5) andthe bonding wires cut off as in (6). It may be necessary to run anexternal bonding conductor to bond the equipment at each end tocomply with code rules.

Note 1:Single-conductor type AC90 cables, in circuits rated over 425 ampsand sized according to Table 3, C.E. Code Part I, ampacities are notrecommended due to the excessive risk of overheating caused bycirculating armour and bonding conductor currents. The PVC jacketis the only practical, effective means of armour isolation fromgrounded metal parts.Note 2:To avoid the heating effect caused by eddy currents, make certain, thatindividual single conductor cables are not surrounded by magneticmaterial. Avoid the use of steel or iron cable connectors or steel clipson to steel supports.

Aluminum Plate Fibre Plate non-conducting

Installation of Single-Conductor AC90, ACWU90 and TECK90 Cables continued

21

Single Phase

* Precise load sharing is difficult with 3 conductors per phase and the configurations shown represent the most practical compromise.

Alcan strongly recommends the use of one, two or fourconductors per phase due to the ease of achieving equalcurrent sharing in practical installations.

Note: (1) Neutral conductors may be located outside the abovegroups in the most convenient manner or as shown.

(2) Not all the configurations shown provide preciselyequal load sharing. The imbalance is decreased as theseparation of the groups is increased relative to thespacing of conductors within the group.

X = One cable diameter (above ground).

A,B,C= Phase conductor designation.

N = Neutral conductor designation.

N A B

A B N

A B N

B A N

x x

x x

x x

x x x x x

OR

A B Nx x 3x A B Nx x 3x A B Nx x *

A B

A B N

A B N

B A N

x

x x

x B

Bx

x A

Ax

x x N

Nx

x

x

Nx

Nx

x

x x x x A B B Ax x xxNxOR

Two Conductors per Phase Four Conductors per Phase

Three Conductors per Phase*

Recommended Configuration for Parallel Operation of Single-Conductor Cables in Free Air

Three Phase

A B C A B

A Bx Cx x N A Bxx Cx x xN A Bx Cx x N

x x 3x x A Bx Cx3xCxOR

B Cx D DA

B CxA

B Cxx xxx xx

AOR

*

*

A B

A B

C B

C C B

x

x

x C

Ax

x

x

x N

N

x N

x

x x x x N NxxAxOR

N Bx Cxx x x x

DA

C BxA

OR

Two Conductors per Phase Three Conductors per Phase*

* Precise load sharing is difficult with 3 conductors per phase and the configurations shown represent the most practical compromise.

Alcan strongly recommends the use of one, two or fourconductors per phase due to the ease of achieving equalcurrent sharing in practical installations.

Recommended Configuration for Parallel Operation of Single-Conductor Cables in Free Air

B Cx D DA

B CxA

C Bxx xxx x

D C BxA

xxxA

OR

OR

A B C C Bxx x

x

A B Cx x

x x N NxxAx

Ax

C Bx x x

A

x

Cx

Bx

A

x

Bx

Cx

A

B C C Bx x x x N NxxAx

Four Conductors per Phase

Note: (1) Neutral conductors may be located outside the abovegroups in the most convenient manner or as shown.

(2) Not all the configurations shown provide preciselyequal load sharing. The imbalance is decreased as theseparation of the groups is increased relative to thespacing of conductors within the group.

D = Separation of groups equal to width of one group.

X = One cable diameter (above ground).

A,B,C= Phase conductor designation.

N = Neutral conductor designation.

23

Ampacities and Installation Configurations for Single Conductors Buried in the EarthInstallationConfiguration Detail NumberConductor Size 1 2 3 4 5 6 7AWG orkcmil Copper NUAL Copper NUAL Copper NUAL Copper NUAL Copper NUAL Copper NUAL Copper NUAL

1/0 *203 *158 *220 *171 165 129 179 *140

2/0 *229 *178 *248 *193 186 145 202 *157

3/0 *258 *201 *280 *218 210 163 228 178

4/0 *291 *227 *315 *246 236 183 256 200

250 *421 *328 *317 *247 *343 *267 256 200 278 217

350 *500 *390 *520 *410 *375 *292 *408 *318 304 237 331 258

500 *605 *471 *630 *495 452 352 *489 *383 365 284 396 309

600 *659 *513 *682 *541 491 382 *534 *419 397 308 433 340

750 *845 *665 *745 *580 *775 *610 554 431 *596 469 447 348 482 379

1000 *980 *780 *846 *659 *890 *710 627 488 683 542 505 393 551 437

1500 *1176 *952 *1011 *821 *1068 *865 746 605 813 660 600 487 665 531

*These values cannot be used when the circuit is deemed to be carrying a continuous load.

25

Applicable Installation ConfigurationsNote: All dimensions in mm

Detail 1: 1 cable per phase915

A B C190 190

Detail 2: 2 cables per phase915

A B C C190 190

AB190190 190


190ABCA B C

190 190 190610


A B C C AB

A B C C190 190

AB190190 190

190


ABCA B C

190

190ABCA B C

190 190 190610


A B C C190 190

AB190190 190

A B C C AB

A B C C AB190

190


190ABCA B C

ABCA B C

190

190ABCA B C

190 190 190610

Ampacities and Installation Configurations for Single Conductors in Underground DuctsInstallationConfiguration Detail NumberConductor Size 1 2 3 4AWG orkcmil Copper NUAL Copper NUAL Copper NUAL Copper NUAL

1/0 *231 *180 *201 *157 159 123 146 114

2/0 *264 *205 *228 *178 180 140 164 128

3/0 *301 *235 *260 *203 204 158 186 145

4/0 *345 *269 *296 *231 231 180 211 164

250 *379 *296 *325 *253 252 197 230 179

350 *461 *360 *391 *306 303 236 275 213

500 *564 *442 *475 *372 364 283 330 257

600 *621 *488 *521 409 404 314 365 284

750 *706 *556 589 464 448 349 406 315

1000 *823 *653 682 541 526 409 474 370

1500 *1004 *813 824 667 618 501 556 452

*These values cannot be used when the circuit is deemed to be carrying a continuous load.

Assumptions: Load factor 100% Conductor temperature 90C Ambient temperature 20C Thermal resistivity

(Deg. C-cm/watt) Earth - 90Duct bank - 85Insulation/jacket - 400

Shield/sheath open-circuit Non-magnetic duct One cable per 5" duct

27

Applicable Installation ConfigurationsNote: All dimensions in mm

A B C

190 190

690

760

290A B

C

190

190

480

760

480or A B C

A B C190 190

190190

190

640

760

450 A A

BB

C C

190

450

760

640

or

orA B CA B C

A B C

A B C

190 190

190190

190

640

760

830

190190

190 190 190

830

A A A

B BBB

A

C CC C 190190

190 190 190 190 190

1200

A

A

A B

B

B

C

B

B

B

A

A

A

C

C

C C

C

760

640

Detail 1: 1 conductor per phase Detail 2: 2 conductors per phase

Detail 4: 6 conductors per phase

Detail 3: 4 conductors per phase

4-004 AMPACITY OF WIRES AND CABLES (SEE APPENDIX B OF 1994 CODE)1) The maximum current which a copper conductor of a given size

and insulation may carry shall be as follows:a) Single-conductor, and single-conductor metal sheathed or

armoured cable, in a free air run, as specified in Table 1; andb) 1, 2, or 3 conductors in a run of raceway, or 2- or 3-conductor

cable, as specified in Table 2; andc) 4 or more conductors in a run of raceway or cable, as specified

in Table 2 with the correction factors applied as specified inTable 5C.

d) Single-conductor and single-conductor metal sheathed andmetal armoured cables in an underground run, as calculated bythe method of the IEEE/ICEA publication Power CableAmpacities, IEEE S135.

2) The maximum current which an aluminum conductor of a givensize and insulation may carry shall be as follows:a) Single-conductor, and single-conductor metal sheathed or

armoured cable, in a free air run, as specified in Table 3; and

b) 1, 2, or 3 conductors in a run of raceway, or 2- or 3-conductorcable, as specified in Table 4; and

c) 4 or more conductors in a run of raceway or cable, as specifiedin Table 4 with the correction factors applied as specified inTable 5C.

d) Single-conductor and single-conductor metal sheathed andmetal armoured cables in an underground run, as calculated bythe method of the IEEE/ICEA publication Power CableAmpacities, IEEE S135.

3) A neutral conductor which carries only the unbalanced currentfrom other conductors, as in the case of normally balancedcircuits of three or more conductors, shall not be counted indetermining ampacities as provided for in Subrules (1) and (2).

4) When a load is connected between a single-phase conductor andthe neutral, or between each of two phase conductors and theneutral, of a three-phase, four-wire system, the commonconductor carries a current comparable to that in the phaseconductors and shall be counted in determining the ampacities asprovided for in Subrules (1) and (2).

Application Rules

Section 4 - Conductors

29

5) The maximum allowable ampacity of neutral supported cable shallbe as specified in Table 36.

6) A bonding conductor shall not be counted in determining theampacities as provided for in Subrules (1) and (2).

7) The correction factors specified in this Rule:a) Apply only to, and shall be determined from, the number of

power and lighting conductors in a cable or raceway; andb) Shall not apply to conductors installed in auxiliary gutters.

8) The ambient correction factors of Table 5A shall apply whereconductors are installed in an ambient exceeding or anticipated toexceed 30C.

9) Where single-conductors having a free air rating are run in contactwith each other, the ampacity shall be corrected by applying thefactors in Table 5B for up to four conductors in contact, and byutilizing the ampacity of Table 2 or 4 where there are more thanfour in contact.

10) Where multi-conductor cables are run in contact with each otherfor distances exceeding 600 mm, the ampacity of the conductorsshall be corrected by applying the factors in Table 5C.

11) The ampacity of conductors of different temperature ratingsinstalled in the same raceway shall be determined on the basis ofthe conductor having the lowest temperature rating.

12) The ampacity of conductors added to a raceway and the ampacityof the conductors already in the raceway shall be determined inaccordance with the applicable Subrules.

13) Where more than one cable ampacity could apply for a givencircuit, the lower value shall be used, except that the higherampacity shall be permitted beyond the point of transition for amaximum distance of 3 m or 10% of the circuit length figured atthe higher ampacity, whichever is less.

4-008 SHEATH CURRENTS IN SINGLE-CONDUCTOR METALSHEATHED CABLES (SEE APPENDIX B OF 1994 CODE)

1) Where sheath currents in single-conductor cables havingcontinuous sheaths of lead, aluminum or copper are likely to causethe insulation of the conductors to be subjected to temperatures inexcess of the insulation ratings, the cables shall be:a) Derated to 70% of current-carrying rating which would

otherwise apply; orb) Derated in accordance with the manufacturers recommendations

by special permission; orc) Installed in such a manner as to prevent the flow of sheath currents.

2) Circulating currents in single-conductor armoured cable shall betreated in the same manner as sheath currents in Subrule (1).

12-012 UNDERGROUND INSTALLATIONS (SEE APPENDIX B OF 1994 CODE)

1) Direct buried conductors, cables or raceways shall be installed tomeet the minimum cover requirements of Table 53.

2) The minimum cover requirements shall be permitted to bereduced by 150 mm where mechanical protection is placed in thetrench over the underground installation.

3) Mechanical protection shall consist of one of the following and,when in flat form, shall be wide enough to extend at least 50 mmbeyond the conductor, cables or raceways on each side:a) Treated planking at least 35 mm thick; orb) Poured concrete at least 50 mm thick; orc) Concrete slabs at least 50 mm thick; ord) Concrete encasement at least 50 mm thick; ore) Other acceptable material.

4) Direct buried conductors or cables shall be installed so that theyrun adjacent to each other and do not cross over each other andwith a layer of 6 mm (nominal) screened sand or screened earth atleast 75 mm deep both above and below the conductors.

5) Where conductors or cables rise for terminations or splices orwhere access is otherwise required, mechanical protection shallbe provided in the form of rigid conduit terminated vertically in thetrench and including a bushing or bell end fitting, or otheracceptable protection, at the bottom end from 300 mm above thebottom of the trench to at least 2 m above finished grade, andbeyond that as may be required by other Rules of the Code, andwith sufficient slack provided in the conductors at the bottom endof the conduit so that the conductors enter the conduit from avertical position.

6) Where deviation has been allowed in accordance with Rule 2-030,cables buried directly in earth may be spliced or tapped intrenches without the use of splice boxes and such splices andtaps shall be made by methods and with material approved for thepurpose.

7) Raceways or cables, if located in rock, may be installed at a lesserdepth entrenched into the rock in a trench not less than 150 mmdeep and grouted with concrete to the level of the rock surface.

8) Raceways may be installed directly beneath a concrete slab atgrade level provided the concrete slab is not less than a nominal100 mm in thickness, the location is adequately marked, and theraceway will not be subject to damage during or after installations.

Section 12 - Wiring Methods

31

9) Any form of mechanical protection which may adversely affect theconductors or cable assemblies shall not be used.

10) Backfill containing large rock, paving materials, cinders, large orsharply angular substances, or corrosive material shall not be placedin an excavation where such materials may damage cables, racewaysor other substructures, prevent adequate compaction of fill, orcontribute to corrosion of cables, raceways or other substructures.

11) The initial installation shall be provided with adequate marking ina conspicuous location to indicate the location and depth of theunderground installation.

12) For installations not covered by the foregoing requirements of thisRule, the requirements of CSA Standard CAN3-C22.3 No. 7-M86,Underground Systems, or the appropriate authority, whichever isgreater, shall apply.

12-106 MULTI- AND SINGLE-CONDUCTOR CABLES

1) Where multi-conductor cable is used, all conductors shall becontained in the same multi-conductor cable except that, where itis necessary to run conductors in parallel due to the capacity of analternating current circuit, additional cables may be used providedany one such cable includes an equal number of conductors fromeach phase and the neutral and shall be in accordance withRule 12-108.

2) A multi-conductor cable shall not contain circuits of differentsystems except as permitted in Rule 12-3034.

3) Where single-conductor cables are used, all single-conductorcables of a circuit shall be of the same type and temperature ratingand, if run in parallel, shall be in accordance with Rule 12-108.

4) Single-conductor armoured cable used as a current-carryingconductor shall be of a type having non-ferrous armour.

5) A single-conductor cable carrying a current over 200 A shall berun and supported in such a manner that the cable is not encircledby ferrous material.

12-118 TERMINATION AND SPLICING OF ALUMINUM CONDUCTORS

1) Adequate precaution shall be given to the termination and splicingof aluminum conductors including the removal of insulation andseparators, the cleaning (wire brushing) of stranded conductors,and the compatibility and installation of fittings.

2) A joint compound, capable of penetrating the oxide film andpreventing its reforming, shall be used for terminating or splicingall sizes of stranded aluminum conductors, unless the terminationor splice is approved for use without compound and is so marked.

3) Equipment connected to aluminum conductors shall bespecifically approved for the purpose and be so marked except:a) Where the equipment has only leads for connection to the

supply; andb) Equipment such as outlet boxes having only grounding

terminals.4) Aluminum conductors shall not be terminated or spliced in wet

locations unless the termination or splice is adequately protectedagainst corrosion.

5) Field-assembled connections between aluminum lugs andaluminum or copper bus bars or lugs, involving bolts or studs3/8-inch diameter or larger, shall include as part of the joint any ofthe following means of allowing for expansion of the parts:a) A conical spring washer; orb) A helical spring washer of the heavy series, provided that a flat

steel washer of thickness not less than one-sixth of the nominaldiameter of the bolt or stud is interposed between the helicalwasher and any aluminum surface against which it would bear; or

c) Aluminum bolts or studs, provided that all the elements in theassembled connection are of aluminum.

6) Connection of aluminum conductors to wiring devices havingwire binding terminal screws, about which conductors can belooped under the head of the screw, shall be made by forming theconductor in a clockwise direction around the screw into three-fourths of a complete loop and only one conductor shall beconnected to any one screw.

Section 12 - Wiring Methods continued

33

Armoured Cable12-600 ARMOURED CABLE WORK RULES

Rules 12-602 to 12-618 apply only to armoured cable work.

12-602 USE

1) Armoured cable may be installed in or on buildings or portions ofbuildings of either combustible or non-combustible construction.

2) Armoured cable shall be of the type listed in Table 19 as suitablefor direct burial if used:a) For underground runs; orb) For circuits in masonry or concrete provided the cable is

encased or embedded in at least 50 mm of the masonry orconcrete; or

c) In locations where it will be exposed to weather, continuousmoisture, excessive humidity, or to oil or other substanceshaving a deteriorating effect on the insulation.

3) Notwithstanding Subrule (2), armoured cable which has thearmouring made wholly or in part of aluminum shall not beembedded in concrete containing reinforcing steel unless:a) The concrete is known to contain no chloride additives; orb) The armour has been treated with a bituminous base of paint or

other means to prevent galvanic corrosion of the aluminum.4) Where armoured cables are laid in or under cinders or cinder

concrete, they shall be protected from corrosive action by agrouting of non-cinder concrete at least 25 mm thick entirelysurrounding them unless they are 450 mm or more under thecinders or cinder concrete.

5) In buildings of non-combustible construction, armoured cableshaving conductors not larger than 10 AWG copper or aluminummay be laid on the face of the masonry or other material of whichthe walls and ceiling are constructed and may be buried in theplaster finish for extensions from existing outlets only.

Note: PVC jackets, as in on Alcan ACWU90 and TECK90, meet the condition set out in 3(b).

12-604 PROTECTION FOR ARMOURED CABLES IN LANESIf subject to mechanical injury and unless otherwise protected,acceptable steel guards of not less than No. 10 MSG, adequatelysecured, must be installed to protect armoured cables less than 2 mabove grade in lanes and driveways.

12-606 USE OF THERMOPLASTIC COVERED ARMOURED CABLE

Armoured cable of the type listed in Table 19 as suitable for direct earthburial and which has a thermoplastic outer covering shall only be usedwhere the outer covering will not be subjected to mechanical injury.

12-608 CONTINUITY OF ARMOURED CABLE

The armour of cables shall be mechanically and electricallycontinuous throughout and shall be mechanically and electricallysecured to all equipment to which it is attached except that the lead-sheath of lead-sheathed armoured cable need not be bonded.

12-610 TERMINATING ARMOURED CABLE

1) Where conductors issue from armour, they shall be protected fromabrasion:a) By acceptable bushings of insulating material or equivalent

devices; orb) By the sheath of lead-sheathed armoured cable.

2) Where conductors are 8 AWG or larger, copper or aluminum, suchprotection shall consist of:a) Insulated type bushings, unless the equipment is equipped with

a hub having a smoothly rounded throat; orb) Insulating material fastened securely in place which will

separate the conductors from the armoured cable fittings andafford adequate resistance to mechanical injury.

3) Where armoured cable is fastened to equipment, the connector orclamp shall be of such design as to leave the insulating bushing orits equivalent, or the end of the lead-sheath, visible for inspection.

4) Where conductors connected to open wiring issue from the endsof armouring, they shall be protected with boxes or with fittingshaving a separately bushed hole for each conductor.


35

5) Where lead-sheathed armoured cables are used in locationswhere moisture may accumulate, a pothead or equivalent deviceshall be used to protect the conductors from moisture andmechanical injury at their point of issue from the lead sheathing.

12-612 PROXIMITY TO KNOB-AND-TUBE AND NON-METALLIC SHEATHED CABLE SYSTEMS

Where armoured cable is used in a building in which concealed knob-and-tube wiring or concealed non-metallic sheathed cable wiring isinstalled, the cable shall not be fished if there is a possibility ofdamage to the existing wire.

12-614 RADII OF BENDS IN ARMOURED CABLES

1) Where armoured cables are bent during installation, the radius ofthe curve of the inner edge of the bends shall be at least 6 timesthe internal diameter of the armoured cable.

2) Where lead-sheathed armoured cable is used, the radius of thecurve of the inner edge of the bends shall be at least 10 times theinternal diameter of the armoured cable.

3) Bends shall be made without undue distortion of the armour andwithout injury to its inner or outer surfaces.

12-616 CONCEALED ARMOURED CABLE INSTALLATION

1) Where armoured cable is run through studs, joists, or othermembers, it shall be:a) located so that its outer circumference is at least 32 mm from

the nearest edge of the members; orb) Protected from mechanical injury where it passes through holes

in the members.2) Where armoured cable is installed immediately behind baseboards,

it shall be protected from mechanical injury from driven nails.

12-618 RUNNING OF CABLE BETWEEN BOXES, ETC.

Armoured cable shall be supported between boxes and fittings inaccordance with Rule 12-510.


Cable Trays12-2200 RESTRICTION OF USECable trays shall not be used in any hazardous location except aspermitted by Rule 18-068.

12-2202 METHOD OF INSTALLATION(SEE APPENDIX B OF 1994 CODE)1) Cable trays shall be installed as a complete system using fittings

or other acceptable means to provide adequate cable support andbending radius before the conductors are installed.

2) The maximum design load and associated support spacing shallnot exceed the values specified in Table 42.

3) Cable trays shall not pass through walls except where the wallsare constructed of noncombustible material.

4) Cable trays may extend vertically through floors in dry locations, ifprovided with acceptable fire stops, and if totally enclosed wherepassing through and for a minimum distance of 2 m above thefloor to provide adequate protection from mechanical injury.

5) Cable trays shall be adequately supported by noncombustiblesupports.

6) Dead-ends of cable trays shall be closed by the use of end fittings.7) The minimum clearances for cable trays shall be:

a) 150 mm vertical clearance, excluding depth of cable trays,between cable trays installed in tiers except where cables of2-inch diameter or greater may be installed, the clearance shallbe 300 mm; and

b) 300 mm vertical clearance from the top of the cable tray to allceilings, heating ducts, and heating equipment and 150 mm forshort length obstructions; and

c) 600 mm horizontal clearance on one side of cable trays mountedadjacent to one another or to walls or other obstructions.

12-2204 CONDUCTORS IN CABLE TRAYS(SEE APPENDIX B OF 1994 CODE)

1) Conductors for use in cable trays shall be listed in Table 19 andexcept as permitted in Subrules (2) and (3) shall have acontinuous metal sheath or interlocking armour.

2) Type TC tray cable shall be permitted in cable trays in areas ofindustrial establishments which are inaccessible to the publicprovided the cable is:

37

a) Installed in conduit or other suitable raceway when not in cabletray; and

b) Provided with mechanical protection where subject to damageeither during or after installation; and

c) No smaller than 1/0 AWG if a single-conductor is used; andd) Installed only where qualified persons service the installation.

3) Conductors having moisture-resistant insulation and flame testednon-metal coverings or sheaths of a type listed in Table 19 shallbe permitted in ventilated or non-ventilated cable trays where notsubject to damage during or after installation in:a) Electrical equipment vaults and service rooms; andb) In other locations which are inaccessible to the public and are

constructed as a service room where a deviation has beenallowed in accordance with Rule 2-030.

4) Single-conductors shall be fastened to prevent excessivemovement due to fault-current magnetic forces.

5) Where single-conductors are fastened to cable trays, precautionsshall be taken to prevent overheating of the fasteners due toinduction.

12-2206 JOINTS AND SPLICES WITHIN CABLE TRAYS

Where joints and splices are made on feeders or branch circuitswithin cable trays, they shall be made and insulated by acceptablemethods and shall be in accessible locations.

12-2208 CONNECTION TO OTHER WIRING METHODS

Where cable trays are connected to other wiring methods, thearrangement shall be such that the conductors will not be subject tomechanical damage or abrasion, and such that effective bonding willbe maintained.

12-2210 PROVISIONS FOR BONDING

1) Where metal supports for metal cable trays are bolted to the trayand are in good electrical contact with the grounded structuralmetal frame of a building, the tray shall be deemed to be bondedto ground.

2) Where the conditions of Subrule (1) do not apply, the metal cabletray shall be adequately bonded at intervals not exceeding 15 mand the size of bonding conductors shall be based on themaximum rating or setting of an overcurrent device in the circuitscarried by the cable tray in accordance with the requirements ofRule 10-814.


12-2212 AMPACITIES OF CONDUCTORS IN CABLE TRAYS

1) In ventilated and ladder-type cable trays, where the air spacebetween conductors, cables or both is maintained at greater than100% of the largest conductor or cable diameter, the ampacity ofthe conductors or cables shall be the value specified in Paragraph(a) or (b):a) Single-conductors, single-conductor metal sheathed or

armoured cable and single-conductor mineral-insulated cable,as specified in Tables 1 and 3; and

b) Multi-conductor cables as specified in Tables 2 and 4,multiplied by the correction factor in Table 5C for the number ofconductors in each cable.

2) In ventilated and ladder-type cable trays, where the air spacebetween conductors, cables or both is maintained at not less than25% nor more than 100% of the largest conductor or cablediameter, the ampacity of the conductors or cables shall be thevalue specified in Subrule (1), multiplied by the correction factorspecified in Table 5D for the arrangement and number ofconductors or cables involved unless a derivation has beenallowed in accordance with Rule 2-030 for other correlationfactors.

3) In ventilated and ladder-type cable trays, where the air spacebetween conductors, cables or both is less than 25%, and for anyspacing in non-ventilated cable tray, the ampacity of theconductors or cables shall be the value as specified in Table 2 or 4multiplied by the correction factor specified in Table 5C for thetotal number of conductors in the cable trays.

4) In determining the total number of conductors in the cable tray inSubrule (3), Rule 4-004(7) shall apply.

5) Where cable trays are located in room temperatures above 30Cthe temperature correction factor of Table 5A shall be applied tothe ampacities determined from Subrules (1), (2) and (3) asapplicable.

Allowable Ampacities and Conduit FillsThe following table has been compiled by Alcan Cable to consolidatereference to Tables 1-4 of the Canadian Electrical Code. References tothese tables in related sections of the Rules of Application can be

cross-referenced to Alcans composite table. The composite table alsoprovides a simple conversion guide for finding equivalent cables incopper and NUAL constructions.

CONDUCTOR AMPACITIES ANDMAXIMUM PERMISSIBLE NUMBER OF CONDUCTORS IN CONDUIT

AWGOR

KCMIL CU CU NUALTW75 RW90 RW90 NOMINAL DIAMETER OF CONDUIT

CU NUAL 1/2" 3/4" 1" 11/4" 11/2" 2" 21/2" 3" 31/2" 4"14 15 15 20 9 15 25 44 60 99 142 200 200 20012 20 20 15 25 20 7 12 20 35 47 78 111 171 200 20010 30 30 25 40 30 5 9 15 26 36 60 85 131 176 200 8 45 45 30 70 45 2 4 7 12 17 28 40 62 83 107 6 65 65 *55 100 80 1 1 4 7 10 16 23 36 48 62 4 85 85 65 135 105 1 1 3 5 7 12 17 27 36 47 3 100 105 75 155 120 1 1 2 4 6 10 15 23 31 40 2 115 120 *95 180 140 1 1 2 4 5 9 13 20 27 34 1 130 140 105 210 165 1 1 3 4 6 9 14 19 25

1/0 150 155 120 245 190 1 1 2 3 5 8 12 16 212/0 175 **185 145 285 220 1 1 1 3 5 7 10 14 18

AMPACITY IN CONDUITTABLES 2 & 4+

AMPACITY IN FREE AIR

TABLES 1 & 3+MAXIMUM PERMISSIBLE NUMBER OF CONDUCTORS IN CONDUIT

TYPES TW75 AND RW90 XLPE+

41

3/0 200 210 165 330 255 1 1 2 4 6 9 12 154/0 230 235 *185 385 300 1 1 1 3 5 7 10 13250 255 265 215 425 330 1 1 2 4 6 8 10300 285 295 240 480 375 1 1 2 3 5 7 9350 310 325 260 530 415 1 1 1 3 4 6 8400 335 345 290 575 450 1 1 1 2 4 5 7500 380 395 330 660 515 1 1 1 3 4 6600 420 455 370 740 585 1 1 1 3 4 5750 475 500 405 845 670 1 1 2 3 4

1000 545 585 480 1000 800 1 1 1 2 31500 1020 1 1 1 2

* For 3-wire 120/240 and 120/208V residential services or sub-services the allowableampacity for size 6 AWG shall be 60 amp, size 2 AWG shall be 100 amp and4/0 shall be 200 amp. In this case the 5% adjustment per Rule 8-106(1) cannot be applied.

** For 3-wire 120/240 and 120/208V residential services or sub-services the allowableampacity for size 2/0 shall be 200 amp. In this case the 5% adjustment per Rule 8-106(1)cannot be applied.

+ SOURCE: 1994 Canadian Electrical Code Part I, Table 6

Table 5A

TABLE 5A(See Rules 4-004(8), 12-2212 and Tables 1, 2, 3, 4, 57, 58 and D3)

CORRECTION FACTORS APPLYING TO TABLES 1, 2, 3 AND 4AMPACITY CORRECTION FACTORS FOR AMBIENT TEMPERATURES ABOVE 30C

(These correction factors apply, column for column, to Tables 1, 2, 3, and 4)

Correction Factor

AmbientTemp.

C

60CTypeTW

75CTypesRW75,TW75

85-90CTypes

R90, RW90T90, NYLON

110CSee

Note (2)125CSee

Note (2)200CSee

Note (2)404550556070758090

100120140

0.820.710.580.41

0.880.820.750.650.580.35

0.900.850.800.740.670.520.430.30

0.940.900.870.830.790.710.660.610.50

0.950.920.890.860.830.760.720.690.610.51

1.001.001.001.000.910.870.860.840.800.770.690.59

Notes:(1) The ampacity of a given conductor type

at these higher ambient temperatures is obtained by multiplying the appropriate value from Table 1, 2, 3 or 4 by the correction factor for that higher temperature.

(2) These ampacities are only applicable under special circumstances where the use of insulated conductors having this temperature rating are acceptable.

43

Table 5B, Table 5C

TABLE 5B(See Rule 4-004(9) and Tables 1 and D3)

CORRECTION FACTORS FOR TABLES 1 AND 3WHERE FROM 2 TO 4 SINGLE-CONDUCTORS

ARE PRESENT AND IN CONTACT

Number of Conductors Correction Factors234

0.900.850.80

Notes:(1) Where four conductors form a

three-phase-with-neutral system, the values for three conductors may be used. Where three conductorsform a single-phase, three-wire system, the values for two conductors may be used.

(2) Where more than four conductors are in contact, the ratings for conductors in raceways shall be used.

TABLE 5C(See Rules 4-004 and 12-2212

and Tables 2 and 4)AMPACITY CORRECTION FACTORS

FOR TABLES 2 AND 4

Number of Conductors Ampacity Correction Factor1 34 67 2425 42

43 and up

1.000.800.700.600.50

Table 5D, Table 8

TABLE 5D(See Rule 12-2212)

CURRENT RATING CORRECTION FACTORS WHERESPACINGS ARE MAINTAINED

(VENTILATED AND LADDER-TYPE CABLE TRAYS)

Number ofConductors or Cables

Horizontally

1 2 3 4 5 6

Vertically1.000.89

0.930.83

0.870.79

0.840.76

0.830.75

0.820.74

TABLE 8(See Rules 12-1014)

MAXIMUM ALLOWABLE PER CENT CONDUIT AND TUBING FILL

Number of Conductors orConstruction Multi-conductor Cables

1 2 3 4 Over 4Conductors or multi-conductor cables (not lead-sheathed)Lead-sheathed conductors or multi-conductor cables

53

55

31

30

40

40

40

38

40

35

45

Table 9

TABLE 9(See Rule 12-1014)

CROSS-SECTIONAL AREAS OF CONDUIT AND TUBING

TradeSize

InternalDiameter

Percent Cross-Sectional Area of Conduit Square InchesInches Inches 100% 55% 53% 40% 38% 35% 31% 30%

1/23/41

11/411/22

21/23

31/24

41/256

0.6220.8241.0491.3801.6102.0672.4693.0683.5484.0264.5065.0476.065

0.300.530.861.502.043.364.797.389.90

12.7215.9420.0028.89

0.1650.2920.4730.8251.1221.8482.6354.0605.4507.0008.771

11.00015.900

0.1590.2810.4560.7951.0811.7802.5403.9105.2506.7458.452

10.60015.320

0.1200.2120.3440.6000.8161.3441.9162.9523.9605.0886.3788.000

11.556

0.1140.2020.3270.5700.7761.2771.8202.8053.7654.8406.0607.600

10.980

0.1050.1850.3010.5250.7141.1761.6772.5853.4654.4505.5817.000

10.120

0.090.160.270.470.631.041.482.293.073.944.946.208.96

0.0900.1590.2580.4500.6121.0081.4372.2142.9703.8204.7846.0008.670

Note: The dimensions represent average conditions only and variations will be found in dimensions of conduit and tubing of different manufacture.

Table 10(See Rule 12-1014)

DIMENSIONS OF INSULATED CONDUCTORS FOR CALCULATING CONDUIT AND TUBING FILL

Notes:1) Subject to the range of conductors and types of wires for which aluminum conductors are approved.2) The dimensions represent average conditions only and variations will be found in dimensions of conductors of different manufacture.

14 (2/64) 0.171 0.0230 0.131 0.0135 14 (3/64) 0.024* 0.0327* 0.166 0.0216 14 0.193 0.0293 0.231 0.0419 0.105 0.008712 (2/64) 0.188 0.0278 0.148 0.0172 12 (3/64) 0.221* 0.0384* 0.183 0.0263 12 0.209 0.0343 0.247 0.0479 0.122 0.011710 0.242 0.0460 0.168 0.0224 10 0.204 0.0327 10 0.230 0.0415 0.268 0.0564 0.153 0.0184 8 0.311 0.0760 0.248 0.0475 0.324 0.0824 0.345 0.0935 0.219 0.0377 6 0.397 0.1238 0.323 0.0819 0.363 0.1035 0.456 0.1633 0.257 0.0519 4 0.452 0.1605 0.372 0.1087 0.412 0.1333 0.505 0.2003 0.328 0.0845

RUBBER (THERMOSET) AND THERMOPLASTIC-INSULATED CONDUCTORS (0-600 V)

SizeAWGkcmil

Diameter Area Diameter Area Diameter Area Diameter Area Diameter AreaInches Inches2 Inches Inches2 Inches Inches2 Inches Inches2 Inches Inches2

Types RW75 Types TW, TW75,RW90, RW75 EP, RW75 XLPE Types TWU, Types RWU75 EP

RW90 EP, RW90 XLPE RWU75 XLPE RWU90 EP Type T90 NylonRW75 XLPE** R90 Silicone, RWU90 XLPE RW90 XLPE** R90 XLPE

47

3 0.481 0.1817 0.401 0.1263 0.440 0.1521 0.533 0.2231 0.356 0.0995 2 0.513 0.2067 0.433 0.1473 0.473 0.1757 0.566 0.2516 0.388 0.1182 1 0.588 0.2715 0.508 0.2027 0.544 0.2324 0.649 0.3308 0.450 0.1590 0 0.629 0.3107 0.549 0.2367 0.585 0.2688 0.690 0.3739 0.491 0.1893

00 0.675 0.3578 0.595 0.2781 0.632 0.3137 0.737 0.4266 0.537 0.2265000 0.727 0.4151 0.647 0.3288 0.684 0.3675 0.789 0.4889 0.588 0.2715

0000 0.785 0.4840 0.705 0.3904 0.744 0.4347 0.849 0.5661 0.646 0.3278250 0.868 0.5917 0.788 0.4877 0.822 0.5307 0.977 0.7497 0.716

0.7710.8220.8690.955

0.40260.46690.53070.59310.7163

300 0.933 0.6837 0.843 0.5581 0.878 0.6055 1.033 0.8381350 0.985 0.7620 0.895 0.6291 0.930 0.6793 1.085 0.9246400 1.032 0.8365 0.942 0.6969 0.978 0.7512 1.133 1.0082500 1.119 0.9834 1.029 0.8316 1.064 0.8891 1.219 1.1671600 1.233 1.1940 1.143 1.0261 1.180 1.0936 1.301 1.3294700 1.304 1.3355 1.214 1.1575 1.252 1.2311 1.373 1.4806750 1.339 1.4082 1.249 1.2252 1.287 1.3009 1.408 1.5570800 1.372 1.4784 1.282 1.2908 1.321 1.3706 1.442 1.6331900 1.435 1.6173 1.345 1.4208 1.385 1.5066 1.506 1.7813

1000 1.494 1.7531 1.404 1.5482 1.444 1.6377 1.565 1,92361250 1.676 2.2062 1.577 1.9532 1.616 2.0510 1.809 2.57021500 1.801 2.5475 1.702 2.2748 1.741 2.3806 1.934 2.93771750 1.916 2.8895 1.817 2.5930 1.858 2.7113 2.051 3.30392000 2.021 3.2079 1.922 2.9013 1.966 3.0357 2.159 3.6610

* These are dimensions for Types RW75 and R90. Dimensions of R90 Silicone in sizes 14 to 10 AWG. Dimensions of R90 Silicone in sizes 8 AWG and larger are the same as Type TW.

Dimensions for Types RW75 XLPE, R90 XLPE, RW90 XLPE, RWU75 XLPE and RWU90 XLPE conductors without a jacket.** Dimensions for Types RW75 XLPE and RW90 XLPE conductors with a jacket.

Table 19

TABLE 19(See Rules 4-006, 6-300, 12-100, 12-302, 12-404, 12-602, 12-606, 12-902, 12-904, 12-1608, 12-2104, 12-2204, 16-112, 16-210, 22-200, 22-202, 22-204, 22-206, 26-642,

30-312, 30-1004, 30-1102, 32-100, 32-202, 34-216, 38-006, 54-100, 56-704, 60-302, 74-004, 78-104, 80-004 and Tables 1, 2, 3, 4 and D1)

CONDITIONS OF USE AND MAXIMUM ALLOWABLE CONDUCTOR TEMPERATURE OF WIRES AND CABLES OTHER THAN FLEXIBLE CORDS, PORTABLE POWER CABLES AND EQUIPMENT WIRES

Conditions of Use Trade Designation CSA Type Designation Maximum AllowableConductor Temperature CReference

Notes

For exposed wiring in dry locations only Armoured Cable TECK90AC90

9090

4, 10, 124, 10, 12

For exposed wiring in dry locations whereexposed to corrosive action, if suitable forcorrosive conditions encountered

Armoured Cable TECK90 90 2, 4, 10, 12

For exposed wiring in dry locations wherenot exposed to mechanical injury

Non-metallic Sheathed Cable NMD90 90 23

For exposed wiring in dry locations andin Category 1 and 2 locations, where notexposed to mechanical injury

Non-metallic Sheathed Cable NMW, NMWU 60 23

49

For exposed wiring in dry or damplocations

Rubber (Thermoset-)Insulated Cable

Thermoplastic-InsulatedCable

Nylon-JacketedThermoplastic-Insulated

Non-metallic SheathedCable

R90

TW

NMD90

90

60

90

4, 9, 10, 11,12

4

1490T90 NYLON

18, 23

For exposed wiring in wetlocations

Armoured Cable


Aluminum-Sheathed Cable

Mineral-Insulated Cable

Thermoplastic-InsulatedCableNon-metallic SheathedCable

TECK90ACWU90

RW75RL90, RW90

RA75RA90

MI, LWMI

TWTW 75NMWU

9090

7590

7590

90

607560

4, 7, 10, 124, 7, 10, 12

4, 7, 10, 124, 7, 10, 12

74, 7, 10, 12

1, 7, 21

4, 74, 77, 8, 23

For exposed wiring where exposedto the weather

Armoured Cable



Neutral-Supported Cable


TECK90

RW75R90, RW90

TW, TWUTWU75

NS-1, NSF-2

NMWU

90

7590

6075

75

60

4, 10, 12

4, 10, 124, 10, 12

44

8, 23

For concealed wiring in dry locations only

Armoured Cable TECK90AC90

9090

4, 10, 124, 10, 12

For concealed wiring in dry and damp locations


NMD90 90 18, 23

For concealed wiring in dry locations and in Category 1 and 2 locations where not exposed to mechanical injury


NMW, NMWU 60 23


Notes

51

For concealed wiring in wetlocations

Armoured Cable




TECK90ACWU90

NMWU

RA75RA90

MI, LWMI

9090

60

7590

90

4, 7, 10, 124, 7, 10, 12

7, 8, 23

74, 7, 10, 12

1, 7, 21

For use in raceways, exceptcable trays, in dry or damplocations



Nylon JacketedThermoplastic-InsulatedCable

R90

TW

90

60

4, 9, 10, 11,12

4

T90 NYLON 90 14

For use in raceways, except cabletrays, in wet locations



RW75, RWU75RW90, RWU90

TW, TWUTW75, TWU75

7590

6075

4, 7, 10, 124, 7, 10, 12

4, 6, 74, 7

For use in ventilated, non-ventilated and ladder-type cabletrays in dry locations only

Armoured Cable AC90TECK90

9090

4, 10, 124, 10, 12

For use in ventilated, non-ventilated and ladder-type cabletrays in wet locations

Armoured Cable



Rubber (Thermoset-)Insulated Lead-SheathedCable

TECK90

RA75RA90

ACWU90

MI, LWMI

RL90

90

7590

90

90

90

4, 7, 10, 124, 7, 10, 12

74, 7, 10, 12

7

4, 7, 10, 12


Notes

53

For use in ventilated and non-ventilated cable trays in vaults andswitch rooms


RW75RW90

7590

4, 10, 12, 134, 10, 12, 13

For direct earth burial (withprotection as required byinspection authority)

Armoured Cable




ACWU90TECK90

NMWU

RWU75RL90, RWU90

RA75RA90

9090

60

7590

7590

4, 5, 10, 124, 5, 10, 12

5, 23

4, 5, 10, 124, 5, 10, 12

54, 5, 9, 10

For direct earth burial (withprotection as required byinspection authority)



Airport series lightingcable

MI, LWMI

TWUTWU75

ASLC

90

6075

90

1, 5, 21

4, 5, 64, 5

22

For service entrance above ground Armoured Cable


AC90ACWU90TECK90

RA75RA90

909090

7590

19

For service entrance above ground Mineral-Insulated Cable

Neutral Supported Cable

MI

NS-1NSF-2

90

75

1, 21

For service entrance below ground Service-Entrance Cable

Thermoplastic InsulatedWireRubber (Thermoset-)Insulated Cable

Armoured Cable


USEI90USEB90

TWUTWU75

RWU75RWU90

TECK90

RA75RA90

ACWU90

90

6075

90

7590

90

7590

90

4, 5, 10, 12

4, 54, 5

4, 5, 10, 12, 15

4, 5, 10, 124, 5, 10, 12

55

For high-voltage wiring inluminous-tube signs

Luminous-Tube Sign Cable GTO, GTOL 60

For use in raceways in hoistways Hoistway Cable 60 16,17For use in Class 2 circuits, inexposed or concealed wiring or use in raceways, in dry or damplocations

Extra-Low-Voltage ControlCable

LVT 60


Notes

55

For use in Class 2 circuits, in drylocations in concealed wiring orexposed wiring where not subjectto mechanical injury

Extra-Low-Voltage ControlCable

ELC 60 20

For use when concealed indoorsunder carpet squares, in dry ordamp locations

Flat Conductor Cable FCC 60

For use in communication circuitswhen exposed, concealed or usedin raceways, indoors in dry ordamp locations, or in ceiling airhandling plenums

Inside Wiring Cable

Communication Cable

Z Station WireIWCZSW

60606060

2525

2525

27

For use in communication circuits,when exposed, concealed, or usedin raceways, in dry or damplocations, within and betweenbuildings

Communication BuildingCable

CBC 60

For use in communication andcommunity antenna distributioncircuits when exposed, concealedor used in raceways, indoors in dryor damp locations or in plenums

Coaxial Cable CXC 60

Premise Commun. Cable PCCMPP, CMP, MPR, CMR, MPG,CMG, MP, CM, CMX, CMH

For use in communication circuitswhen concealed indoors undercarpet squares, in dry ordamp locations

Communication FlatCable

CFC 60 24

For use in fire alarm, signal andvoice communication circuitswhere exposed, concealed or usedin raceways, indoors in dry ordamp locations

Fire Alarm and SignalCable

FASFAS 90FAS 105FAS 200

6090105200

26

For use in raceways includingventilated, non-ventilated andladder-type cable trays in wetlocations and where exposed toweather

Tray Cable TC 28

For use in cable trays in Class 1,Division 2 and Class 2 hazardouslocations

Tray Cable TC 28


Notes

For use in communication circuitswhen exposed, concealed or usedin raceways, indoors in dry ordamp locations, or in ceiling airhandling plenums

Flame and Smoke TestedCable

FSTC 60 25

57

For use in buildings in dry or damplocations where exposed,concealed or used in raceways, orin plenums

Non-conductive OpticalFiber Cable

OFNP, OFNR, OFNG,OFN, OFNH

29

For use in buildings in dry or damplocations where exposed,concealed or used in raceways, orin plenums

For use in buildings in dry or damplocations where exposed orconcealed

Conductive Optical FiberCable

Hybrid ConductorCable

OFCP, OFCR, OFCG,OFC, OFCH

NMDH90

90

29

30

Notes

(1) A maximum sheath temperature of 250C is permissible formineral-insulated cable, provided the temperature at theterminations does not exceed that specified in Tables 1 and 2.Any protective covering provided shall be suitable for theapplicable sheath temperature.

(2) May be used where exposed to heat, grease or corrosive fumes,if suitable for the corrosive condition.

(3) For bare or tinned copper conductors having individual strandssmaller in diameter than 0.015 inch, the maximum allowableconductor temperature is 150C.

(4) When any of these types have an insulation or covering suitablefor installation and use at temperatures down to minus 40C,they are surface printed with the type designation followed byMINUS 40C or (-40C).

(5) Conductors or cable assemblies acceptable for direct earthburial may be used for underground services in accordancewith Rule 6-300.

(6) Types TW and TWU, when provided with a nylon jacket, arealso approved for use where adverse conditions may exist,such as in oil refineries and around gasoline storage or pumpareas (e.g., where subjected to alkaline conditions in thepresence of petroleum solvents).

(7) Types suitable for use in wet locations may also be used in dryor damp locations.

(8) Type NMWU cable is not suitable for use in aerial spans.(9) Types having silicone rubber insulation are surface marked

with the type designation followed by siliconee.g., R90 (silicone).

(10) Types having cross-linked polyethylene insulation are surfacemarked with the type designation followed by X-Link orXLPE e.g., R90 (X-Link) or R90 XLPE.

(11) Type R90 Silicone may be used to connect equipment which ismarked as requiring supply conductors having insulationsuitable for a temperature up to 125C.

(12) Types having ethylene-propylene insulation are surface markedwith the type designation followed by EP, e.g., R90 (EP).

(13) Types RW75 and RW90, when used under Rule 12-2204, are required to be flame-tested.

(14) When exposed to oil, Type T90 NYLON is limited to 60C.(15) Type USEB90 shall have a non-metallic jacket over concentric

neutral conductor.(16) Hoistway cables may also be provided with 90C insulation.(17) Except for short runs not exceeding 1.5 m in length, the parallel

construction is intended for use in raceways in which thecables are laid in.

(18) With thermoplastic jacket in damp locations.(19) For dry locations only.(20) Type ELC cable is limited to Class 2 circuit application as per

Rule 16-210.(21) Mineral-insulated cable having a stainless steel sheath requires

a separate grounding conductor. (See Rule 10-804(e)).(22) Type ASLC is for use only in accordance with Section 74.(23) NMD90, NMW and NMWU were previously marked NMD-7,

NMW-9 and NMW-10 respectively.

59

(24) CFC conductors that are used to electrically connectcommunications equipment to a telecommunications networkshall not be smaller than 26 AWG copper. Conductors of 28and 30 AWG copper shall be permitted for other types ofcommunications applications.

(25) FSTC, IWC, ZSW and PCC that meet with the flame-spreadrequirements of Rule 2-128 for plenum spaces shall also bepermitted for communication circuits when exposed in ceilingair handling plenums.

(26) Types FAS, FAS 90, FAS 105 and FAS 200 may be providedwith mechanical protection such as interlock armour or analuminum sheath, with or without overall thermoplasticcovering. A thermoplastic covering shall be provided over theinterlock armoured cable when installed in a damp location.

(27) CXC that meets the flame-spread requirements of Rule 2-128for plenum spaces shall also be permitted for communicationand community antenna distribution circuits when exposed inceiling air handling plenums.

(28) The maximum allowable conductor temperature for Type TCcables is dependent on the temperature rating of the cable somarked.

(29) OFNP, OFNR, OFNG, OFN, OFNH, OFCP, OFCR, OFCG, OFCand OFCH shall have a minimum cable temperature rating of60C. Cables having a temperature rating greater than 60Cshall be permitted provided that the temperature rating issurface marked on the cable.

(30) The signalling conductors of a hybrid conductor cable shall notbe smaller than No. 24 AWG.

Tables 20-22

TABLE 20(See Rule 12-204 and 12-214)

SPACINGS FOR CONDUCTORS

Voltageof Circuit

Minimum DistanceMillimetres

Volts Between Conductors From Adjacent Surfaces 0 to 300301 to 750

65100

1325


SUPPORTING OF CONDUCTORS IN VERTICAL RUNS OF RACEWAYS

Conductor Size Maximum Distance - MetresAWG and kcmil Copper Aluminum

146

00

250Over 350Over 500Over 750

tototo

tototo

800000

350500750

303024

18151210

306055

40353025

Note: For installation of armoured cables in vertical raceways please contact Alcan Cable for assistance.


SPACE FOR CONDUCTORS IN BOXES

Size of Conductor

AWG

Usable Space Requiredfor Each Insulated

ConductorCubic Inches

14121086

1.51.752.252.754.5

61

TABLE 16(See Rules 10-518, 10-814, 10-816, 10-906, 12-1814, 24-104, 24-202, 66-202, 68-058 and 68-406)

MINIMUM SIZE CONDUCTORS FOR BONDINGRACEWAYS AND EQUIPMENT

Rating or setting of Overcurrent Device in

Circuit Ahead of Equipment,Size of Bonding Conductor

Conduit, etc.Not Exceeding - Amperes

Copper WireAWG

Aluminum Wire

AWG20304060

100200300400

500600800

1000120016002000

25003000400050006000

141210108643

210

00000

0000250 kcmil

350 kcmil400 kcmil500 kcmil700 kcmil800 kcmil

1210886421

000

000

0000250 kcmil350 kcmil400 kcmil

500 kcmil600 kcmil800 kcmil

1000 kcmil1250 kcmil

Table 16

NOTES:(1) Refer to appendix B C.E.C.

Rule 10 - 814(1) for sizing bonding conductors in factory assembled cables.

(2) Refer to definitions in sectionO C.E.C. for:-

Grounding ConductorBonding Conductor

TABLE 17(See Rules 10-204, 10-206 and 10-812)

MINIMUM SIZE OF GROUNDING CONDUCTOR FOR AC SYSTEMS OR COMMON GROUNDING CONDUCTOR

Ampacity of Largest Service Conductor or Equivalent for

Multiple Conductors

Size of Copper Grounding Conductor

AWG100 or less101 to 125126 to 165

166 to 200201 to 260

261 to 355356 to 475Over 475

864

32

000

000

Note: The ampacity of the largest service conductor, or equivalent if multiple-conductors are used, is to be determined from the appropriate Code Table taking into consideration the number of conductors in the conduit and the type of insulation.

Table 17

63

Table 18


MINIMUM SIZE OF GROUNDING CONDUCTOR FOR SERVICE RACEWAY AND SERVICE EQUIPMENT

Ampacity of Size of Grounding ConductorLargest Service Conductors

or Equivalentfor Multiple Conductors

Not Exceeding - Amperes

Copper Wire

AWG

Metal Conduitor Pipe

Inches

ElectricalMetallic Tubing

Inches60

100200

400600800

Over 800

886

310

00

3/41

11/4

21/2346

111/411/2

21/244

Dimensions of Stranded Bare Copper and Aluminum Conductors

CONDUCTOR WIRES NOMINAL CONDUCTOR DIAMETERSIZE AREA

NO.DIAMETER Class B Standard Compressed Round Compact Round

AWG Circ. Mils mm2 sq. in. mm in. mm in. mm in. mm in.201816

102016202580

0.5190.8231.31

.00080

.00128

.00203

777

0.310.390.49

.0121

.0152

.0192

0.921.161.46

.036

.046

.058141210

41106530

10380

2.083.315.26

.00323

.00513

.00816

777

0.610.770.98

.0242

.0305

.0385

1.842.322.95

.073

.092

.116

1.782.252.86

.071

.089

.113864

165102624041740

8.3713.3021.15

.01297

.02061

.03278

777

1.231.551.96

.0486

.0612

.0772

3.714.675.89

.146

.184

.232

3.604.535.71

.142

.179

.225

3.404.295.41

.134

.169

.213321

526206636083690

26.6633.6242.41

.04133

.05212

.06573

77

19(18)

2.302.471.69

.0867

.0974

.0664

6.607.428.43

.260

.292

.332

6.407.208.18

.252

.282

.322

6.056.877.60

.238

.268

.2991/02/03/04/0

105600133100167800211600

53.5167.4485.02

107.22

.08291

.1045

.1318

.1662

19(18)19(18)19(18)19(18)

1.892.132.392.68

.0745

.0837

.0940

.1055

9.4710.6411.94 13.41

.373

.418

.470

.528

9.1910.3211.5813.00

.362

.406

.456

.512

8.55 9.5710.812.1

.336

.376

.423

.475 250 kcmil 300 350 400

126.68152.01177.34202.68

.1963

.2356

.2749

.3142

37(35)37(35)37(35)37(35)

2.092.312.472.64

.0822

.0900

.0973

.1040

14.6016.0017.3018.49

.575

.630

.681

.728

14.1615.5216.7817.94

.558

.611

.661

.706

13.214.515.716.7

.520

.570

.616

.659 500 600 7501000

253.36304.02380.03506.70

.3927

.4712

.5890

.7854

37(35)61(58)61(58)61(58)

2.952.522.823.25

.1162

.0992

.1109

.1280

20.6522.6825.3529.26

.813

.893

.9981.152

20.0322.0024.5923.38

.789

.866

.9681.117

18.720.723.026.9

.736

.813

.908

1250150017502000

633.38 760.05 866.731013.40

.98171.1781.3741.571

9191

127127

2.983.262.983.19

.1172

.1284

.1174

.1255

32.4735.8638.7641.45

1.2891.4121.5261.632

31.7634.7837.6040.21

1.2501.3701.4791.583

Reduced number of wires for compact strandings shown in parentheses.

65

ConductorSize

AWG or kcmil

APPROXIMATE NET WEIGHT AVERAGE DC RESISTANCE* +25Ckg per 1000 m Lbs per 1000 ft. Ohms% 1000 m Ohms% 1000 ft.

Copper Aluminum Copper Aluminum Copper Aluminum Copper Aluminum201816141210864321

1/02/03/04/0

250300350400500600750

10001250150017502000

* Approximate weights and average DC resistances are considered to apply to all types of strands.Conductor data and metric equivalents in these tables are based where possible on EEMAC (Electro-Federation) recommendations current at time of compilation, otherwise on published ICEA standards.

9.1214.523.136.758.373.592.7

117147186234296349419489559699838

105014001750210024402790

4.707.46

11.918.930.047.775.9

121192242305385485611771972

115013801610184023002760345045905740689080409091

3.155.027.97

12.720.232.151.081.0

129162205259326411518653772925

1080124015401850232030903860463054006180

34.621.813.78.615.423.412.141.350.8480.673.0553.0423.0335.0266

0.2110.1670.1420.1180.1010.08850.07080.05900.04720.03540.02830.02360.02020.0177

8.895.593.522.211.391.100.8750.6940.5500.4360.4360.2740.2320.1940.1660.1450.1160.09670.07740.05800.04640.03870.03320.0290

10.56.644.182.631.651.04.653.411.258.205.163.129.102.0811.0643.0510.0432.0360.0308.0270.0216.0180.0144.0108.00863.00719.00616.00539

2.711.701.07.674.424.336.267.211.168.133.105.0836.0708.0590.0506.0442.0354.0295.0236.0177.0142.0118.0101.00885

6.139.75

15.524.639.249.462.378.699.1

125157199235282329376469563705939

1170141016401880

DC Resistance Values of Stranded Copper and Aluminum Conductors

Table D6

Type of Connection Wire SizeAWG kcmil

Wire Binding ScrewsConnectorswith SlottedScrews

ConnectorsforExternalDriveWrench

14-1014, 12 & 10

86 & 4

3 to 4/0 I

alcan - the 1966 installer handbook for alcan wire and cables wireman guide 1996

Documents

armoured cables

conductor ac90

kilometres of conductor

electrical conductor

electrical conductors

acwu90 andteck90 cables

service cable

cable market