161301

Field Installation and IP 16-13-1

Testing of Electrical Equipment Page 1 of 8Rev. 0 June 1997

THIS INFORMATION FOR AUTHORIZED COMPANY USE ONLYEXXON RESEARCH AND ENGINEERING COMPANY FLORHAM PARK, N.J.

INTERNATIONALPRACTICE

SCOPE

I 1.1 This practice covers installation and field testing of electrical distribution systems. The contents of thispractice are arranged as follows:

TABLE OF CONTENTS

SCOPE..........................................................................................................................1

SUMMARY OF ADDITIONAL STANDARDS .................................................................1

DEFINITIONS................................................................................................................2

CONDUIT SYSTEM INSTALLATION.............................................................................2

BURIED CABLE INSTALLATION ..................................................................................2

GROUNDING CABLE INSTALLATION .........................................................................3

ABOVE-GROUND WIRING SYSTEM INSTALLATION - CABLE TRAYS ......................3

INSULATED WIRE AND CABLE INSTALLATION .........................................................3

TEST PROCEDURES ....................................................................................................3

LIQUID DIELECTRIC TESTS ........................................................................................4

CABLE HIGH VOLTAGE TESTS ...................................................................................4

WIRING INSULATION TESTS.......................................................................................5

POWER TRANSFORMER TESTS .................................................................................6

SWITCHGEAR TESTS ..................................................................................................6

MEDIUM VOLTAGE MOTOR CONTROL CENTER TESTS...........................................7

TESTING OF LV CONTROL CENTERS, SWITCHRACKS, AND TURNAROUNDPOWER CENTERS .......................................................................................................7

MOTOR INSULATION RESISTANCE TESTS AND RUN-IN ..........................................7

GROUNDING RESISTANCE TESTS .............................................................................7

BATTERY CHARGING AND CHARGER TEST .............................................................7

TESTING OF PACKAGED UNIT SYSTEMS ..................................................................8

ALARMS, EMERGENCY CONTROL SYSTEMS AND OTHER EQUIPMENT TESTS ....8

I 1.2 An asterisk (V) indicates that additional information is required. If a job is contracted, this additionalinformation is furnished in the Job Specification.

I 1.3 The following references are synonymous: BP and IP.

SUMMARY OF ADDITIONAL STANDARDS

I 2.1 For installation of above-ground wiring and all conduit wiring, the appropriate sections of ANSI/NFPA70, National Electrical Code (NEC) and other requirements of the authority having jurisdiction shall befollowed for plant locations in the U.S.A.

I 2.2 For testing, Table 1 lists the standards which are to be used for the applicable equipment. For generaltesting methodology and minimum acceptable test values, refer to NETA.

TABLE 1

STANDARDS

ASTM StandardD117 Testing Electrical Insulating Oils

NETA - International Electrical Testing AssociationAcceptance Testing Specifications for Electrical Power Distribution Equipment and Systems

I 2.3 Applicable standards and testing for equipment used in the USA are given in this practice. For facilitiesinstalled in other countries, field tests shall conform to the nationally recognized standards which arerequired within that country.

Changes shown by

IP 16-13-1 Field Installation andPage 2 of 8 Testing of Electrical Equipment

Rev. 0 June 1997



DEFINITIONS

I V 3.1 Acceptable and Preferred Practices. Where this practice lists more than one type of material or methodas acceptable, the Contractor shall make the selection based on installed cost. Where one particular typeof equipment or method is listed as preferred, it shall be selected, provided it is lower or equivalent ininstalled cost to other acceptable types or methods. Optimum cost benefits may be achieved by reducingmaintenance and operating expense through initial added investment. Economic basis for calculatingoptimum cost benefits will be included in the general job specification. Owners Engineer shall approvealternative choices.

CONDUIT SYSTEM INSTALLATION

S 4.1 All underground conduit runs and duct banks shall be encased in red concrete and shall be as follows:

a. Concrete shall be colored red with a permanent coloring additive mixed with the concrete.

b. The minimum thickness of encasement shall be 3 in. (75 mm) on top, and 2 in. (50 mm) on sidesand bottom. If conduits rise above ground, the encasement shall extend 6 in. (150 mm) aboveground.

c. The top of the concrete encasement shall be at least 18 in. (450 mm) below grade. At road andrailroad crossings, the top of the encasement shall be at least 30 in. (750 mm) below the roadsurface or rail base.

BURIED CABLE INSTALLATION

C V 5.1 Cables shall be laid in trenches in single horizontal tiers, unless a 2-tier design is approved by theOwners Engineer, as follows:

a. Before cables are placed, the trench bottom shall be leveled and backfilled with a layer of sand 4in. (100 mm) thick.

b. The cables shall be placed on the sand, then be covered with another layer of sand 4 in. (100 mm)deep as measured from the top of the largest cable.

S c. A protective covering 2 in. (50 mm) thick of red concrete, shall then be applied, using eitherprecast concrete slabs (preferred) or cast-in-place concrete (alternate). Size of pre-cast concreteslabs shall be at least 10 in. x 12 in. (250 mm x 300 mm). The protective cover shall extend aminimum of 3 in. (75 mm) beyond the outer cables in the trench, but need not be extended underelevated substations.

d. The top surface of the largest cable in the trench shall be a minimum of 30 in. (750 mm) belowfinished grade. This may be reduced to 18 in. (450 mm) for trenches outside process unit limitscontaining only lighting circuits.

e. Burial depth may be increased where necessary to meet underground conditions, but it is preferredthat burial depth does not exceed 48 in. (1.2 m).

MARKING

M 5.2 Underground cables shall be identified by circuit number stamped on bands attached to each cable asfollows:

V a. Bands shall be corrosion resistant metal, except that plastic bands designed for the purpose, withmachine-raised lettering and mechanical (not adhesive) closure, may be approved by the Owner'sEngineer.

b. Bands shall be attached to cables at intervals not over 25 ft (7.5 m), at every splice, at entranceand exit of duct banks and at the equipment supplied. Bands on cables originating at elevatedsubstations shall be located visibly between the substation floor and grade.





S 5.3 A system of aboveground concrete markers shall be provided to locate and identify direct buried cablesas follows:

a. Markers shall be located at every point where the trench changes direction, and at intervals notgreater than 50 ft (15 m) within process unit limits and 150 ft (45 m) outside process unit limits.

b. Markers shall be located above every underground splice.

M 5.4 For trenches 3 ft (900 mm) or more in width, markers shall be provided on both edges of the trench; ifless than 3 ft (900 mm) in width, provide markers at one edge of the trench only.

M 5.5 Markers shall have identification plates of corrosion-resistant metal suitable for marking with a steel diestamp. Plates shall have the following information:

a. Direction of cable runs.

b. Location of splices.

c. Location of trench with respect to marker.

GROUNDING CABLE INSTALLATION

S,R V 6.1 Separate grounding cables when specified shall be installed as follows:

a. In trenches with buried insulated cables, with the same protection as the other cables.

b. In separate trenches with a 3 in. (75 mm) sand bedding all around plus a red concrete cover. Theconcrete cover shall not be extended under elevated substations, or installed in switch ortransformer yards.

c. Alongside a duct bank with a 3 in. (75 mm) sand bedding all around but no concrete cover.

d. Soil free of stones over 1/4 in. (6 mm) may be substituted for sand.

ABOVE-GROUND WIRING SYSTEM INSTALLATION - CABLE TRAYS

M 7.1 Each cable shall be identified as for Buried Cable Installation in Par. 5.2 of this practice, exceptmarker intervals shall be 50 ft. (15 m). Bands shall be attached to cables where cables enter and leavetrays or ladders, or enter branch trays or ladders.

R 7.2 Plastic and nylon cable straps shall not be used to tie cables to vertically mounted cable trays.

INSULATED WIRE AND CABLE INSTALLATION

R V 8.1 Qualification of Contractor's splicing personnel for both control cables and power cables, shall beapproved by Owner's Engineer.

R 8.2 Splices and taps. Wire and cable shall be run in single lengths between terminations, where practical.

R 8.3 Wire and cable connections at motors having pigtail leads shall be made with lug type connectors andcorrosion resistant bolts, nuts, washers, and lockwashers. Motors with pigtail leads shall be lugged in thefield if not so furnished.

R 8.4 All stranded conductors which connect to terminal strips or boards having screw type terminals shall beconnected to the terminal screws with lugs. All wiring shall be terminated with a lug or ferrule applied witha mechanical crimp. CT secondary wiring shall be terminated with ring lugs.

TEST PROCEDURES

R,C V 9.1 Before the electrical facilities are placed in operation, the Contractor shall make suitable field tests toestablish that all equipment, devices, and wiring have been correctly installed, are in satisfactory workingcondition, and will operate as intended. Unless otherwise specified, manufacturer's recommendationsshall be included. All tests specified in this practice must be performed in the field before energizing. Shoptests shall not be used to satisfy any field test requirement. When pre-fabricated building modules aretested prior to shipping, Contractor shall propose a field test program for Owners Engineer approval.


Rev. 0 June 1997



R,C V 9.2 Before field testing begins, the Contractor shall submit for review by the Owner's Engineer a list ofminimum acceptable test values and procedures, to be followed in the measurement of liquid dielectricstrength, equipment dielectric absorption ratios, and insulation resistance for circuits and equipment.Values shall conform to those specified in manufacturers' instructions or applicable national standards.Liquid dielectric strength values shall include the method of test (ASTM D-117 or equivalent nationalstandard).

O V 9.3 When specified, detailed step-by-step procedures shall be prepared to verify correct operation of mainswitchgear. These procedures shall be reviewed in detail with the Owner's Engineer prior to the start offield testing.

M V 9.4 The results (i.e., test values) of all tests described in this practice which are marked with () shallbe recorded on forms provided by the Contractor, consistent with established site data form requirements.These forms shall be first approved by the Owner's Engineer.

R V 9.5 Testing evaluation shall be as follows:

a. Test results shall be submitted to the Owner's Engineer for review before circuits or equipment areenergized for the first time.

b. Individual measurements which fall below the average of like measurements on similar equipmentby more than 25% shall be submitted to the Owner's Engineer for specific approval.

I V 9.6 Unless otherwise specified, the Owner's Engineer will witness all tests, and shall be notified one weekbefore tests are to take place.

I 9.7 Test reporting shall comply with the following:

a. Two certified copies of the () test data shall be given to the Owner's Engineer.

b. One copy of test reports shall be submitted immediately after each test is completed to facilitate atimely review by the Owner's Engineer prior to energizing equipment.

c. Upon completion of all other tests described in this practice, Contractor shall submit to Owner'sEngineer two copies of certified report attesting that each test has been performed in accordancewith this practice.

d. The report for each test shall include the date of performance and name of the person in charge ofthe test.

LIQUID DIELECTRIC TESTS

R 10.1 Each container of oil to be used for filling power transformers shall be sampled and tested fordielectric strength. Only oil which by test shows an acceptable dielectric strength shall be used.

R 10.2 Before energizing any oil-immersed equipment, a sample of the oil taken from the enclosure shall betested for dielectric strength. This shall not apply to small equipment shipped sealed from the factory,such as current and potential transformers and sealed power transformers 100 kVA and smaller. It shallapply to the following:

a. Transformers over 100 kVA.

b. Transformer primary disconnect switches.

c. Transformer on-load tap changer arcing compartments.

d. Bulk oil circuit breakers.

e. Minimum oil content circuit breakers, unless manufacturer's instructions do not recommend.

f. Motor starters.

CABLE HIGH VOLTAGE TESTS

R 11.1 A D-C high voltage test shall be made, after installation, on metallic shielded or metallic sheathed cables,and test data shall be recorded to include (for record purposes) measured values of leakage current versustime, for the following cable services:

a. All cables, except motor feeder cables, operating at nominal system voltages of 1001 through7,200 volts.

b. All cables, including motor feeder cables, operating at nominal system voltages of 7,201 volts andabove.





R 11.2 The D-C high voltage tests shall be performed in accordance with the following:

a. Cables shall be installed in final position, with all through splices and end terminations complete.

b. Terminations shall be kept disconnected so that equipment (e.g., motor, switchgear, transformers)is not subjected to the test voltage; however, insulation shall be penciled and otherwise preparedfor completion of the terminations to the greatest extent possible for protection of the cable,including making up and grounding of stress cones for shielded cable.

c. Where potheads are employed, all internal work in making up the pothead shall be completeincluding filling. Pothead insulators shall be clean and dry, and if high voltage test lead is attachedto pothead terminal it shall leave terminal in a direction parallel to the axis of the pothead for adistance of not less than the dry arcing distance over the insulator. Test voltage shall not exceedthe maximum withstand test voltage guaranteed by the pothead manufacturer.

I V 11.3 Test voltage, duration of test, and test procedure shall be in accordance with nationally recognizedstandards to which the cable conforms. Contractor shall submit proposed test values to Owner's Engineerfor agreement prior to start of testing.

R 11.4 Cumulative Insulation Breakdown Tests. If insulation failures or other interruptions result in a total(cumulative) time under test at the test voltage, for a given cable, exceeding twice the time specified inapplicable standards for other cable types, then the duration of any subsequent tests shall be reduced to1/3 of the times specified.

WIRING INSULATION TESTS

R 12.1 Insulation resistance of each circuit shall be measured before energizing (with neutral grounddisconnected) as follows

a. Line(s) to neutral.

b. Line(s) to ground.

c. Neutral to ground.

R,C 12.2 Circuit testing shall be as follows: Test scheduling shall minimize disconnection and reconnection.

a. Motor feeders are tested with motors disconnected and controller open. For VFD feeders, the VFDshall be disconnected prior to testing.

b. Motor control circuits are tested with control stations and overcurrent devices connected, fromphase to ground only.

c. Lighting feeders are tested with feeder breaker open and panelboard connected. If a lightingtransformer is associated with the panelboard, it shall be connected and the test made for bothprimary and secondary sides.

d. Lighting branch circuits are tested after all lamp holders, receptacles, fixtures, and similar itemsare connected, with switches turned on but before lamping. If circuits feed auto-transformer typeballasts, the only reading possible will be from line, or neutral, to ground. If fixtures with powerfactor correcting capacitors connected line-to-line are involved, it may be necessary to disconnectthem to avoid capacitor overvoltage.

e. Circuits rated above 1000 volts having splices or having potheads or similar terminating devicesare tested before splicing, and before terminating. Repeat test after splices and terminations havebeen completed.

f. Direct buried cable circuits are tested before cable trenches are backfilled. Repeat test afterbackfilling.

R,C 12.3 When "mineral insulated" cable is used for pipe heating, circuit continuity shall be checked, andinsulation resistance shall be measured as follows:

a. Prior to removing cable from reel.

b. Prior to installing cable on pipe.

c. Prior to installing insulation on pipe.

d. Prior to energizing cable.


Rev. 0 June 1997



POWER TRANSFORMER TESTS

R 13.1 Winding insulation resistance shall be measured from primary and secondary to ground, and fromprimary to secondary.

O 13.2 Test operation of fault pressure relays and temperature device in accordance with manufacturers'instructions.

O 13.3 Tap changer operational test. De-energize transformer before operating no-load tap changers. Turn-to-turn ratio tests shall be made to verify that winding ratios are in accordance with transformer nameplate.Measure ratio with changer in each position.

SWITCHGEAR TESTS

R 14.1 Prior to energizing, insulation resistance of each bus shall be measured from phase-to-phase andfrom phase-to-ground with breakers withdrawn. Measurements shall be repeated with circuit breakers inoperating position and contacts open.

R 14.2 Prior to energizing, control circuit insulation resistance shall be measured to ground.

O,I 14.3 Before operating, all circuit breakers shall be subjected to the following tests:

a. Contact alignment and wipe shall be checked and adjusted if necessary in accordance withmanufacturer's instructions.

b. Each circuit breaker shall be drawn out of its cubicle, closed manually, and its insulation resistancemeasured from phase-to-phase and from phase-to-ground. Contact resistance (ductor) readingsshall be taken across each set of contacts with the circuit breaker closed.

c. All adjustable direct acting trip devices shall be set according to the protective relay settings recorddata.

O 14.4 Before switchgear is energized, each circuit breaker shall be checked in its "test" position and again inits operating position as follows:

a. Close and trip circuit breaker from its control switch, remote control station, or operating handle.Switchgear bus may become energized from a limited-fault source (such as construction powerlighting) to permit test operation of circuit breakers with a-c closing.

b. Trip each electrically operated circuit breaker with its mechanical trip device.

c. Test operation of circuit breaker latch check switch, if provided.

d. Test proper operation of lockout device in the closing circuit, where provided, by simulatingconditions which would cause a lockout to occur.

e. Trip breaker by manually operating, or by applying current or voltage to, each of its associatedprotective relays.

S,O 14.5 Each adjustable relay shall be set, calibrated, and tested using standard test equipment. Settings,calibration points, and check points shall conform to the protective relay settings record data.

O,R 14.6 Instrument transformer secondary circuits shall be tested by the following methods:V a. Make a visual check of all current transformer terminals to determine if shorting bars are installed.

Record and submit to Owner's Engineer, the location and reason for any shorting bar left oncurrent transformers after current injection tests.

V b. Apply current to the secondary winding of current transformers and verify that proper relays andmeters (as applicable) operate. When specified, perform primary injection testing to verifycontinuity of the complete current circuits.

c. Apply voltage to the secondary winding of potential transformers and verify that proper relays andmeters (as applicable) operate.

O 14.7 Automatic transfer circuits of secondary selective substations shall be completely tested for properoperation as follows:

a. A detailed step-by-step test procedure shall be followed that will verify the correct operation of allcontacts in each of the two incoming circuit breakers and the tie breaker.

b. Test transfers shall be initiated by simulated fault and undervoltage conditions.

c. The transfer time under no-load conditions shall be measured with a cycle counter.





S 14.8 After energizing switchgear but before closing tie circuit breakers (where provided), phase out acrosstie circuit breakers using "hot sticks" or potential transformers and voltmeters.

MEDIUM VOLTAGE MOTOR CONTROL CENTER TESTS

R 15.1 Before energizing the equipment, the insulation resistance of each bus shall be measured from phase-to-phase and from phase-to-ground with disconnect devices open. Repeat measurements with disconnectdevices closed but with switching devices open.

R 15.2 Contact alignment and wipe for each switching device shall be checked and adjusted where necessaryin accordance with manufacturers' instructions.

S,O 15.3 Relay and Direct Acting Trip Device Settings. Set each adjustable relay and direct acting trip device inaccordance with the protective relay settings record data.

O 15.4 Operation of Contactor. Each contactor shall be closed and tripped from its control switch and remotecontrol station to test proper operation.

TESTING OF LV CONTROL CENTERS, SWITCHRACKS, AND TURNAROUND POWER CENTERS

R 16.1 Bus Insulation Resistance. Before energizing, the bus insulation resistance shall be measured fromphase-to-phase and from phase-to-ground with disconnect devices open. Measurements shall be repeatedwith disconnect devices closed.

MOTOR INSULATION RESISTANCE TESTS AND RUN-IN

R,C 17.1 Insulation resistance of all motor windings shall be measured before connecting power cables to motors.Measurements shall be repeated after power cable terminations are completed.

R,C 17.2 Measure the 60:30 second dielectric absorption ratio of motor windings rated above 1000 V. Measurethe 10:1 minute polarization index of windings on motors rated above 1500 HP.

O 17.3 All motors shall run uncoupled for a minimum continuous period of 2 hours before the driven equipmentis placed in regular service. On larger machines, run-in period may need to be extended to allow bearingtemperatures to stabilize.

GROUNDING RESISTANCE TESTS

S,R 18.1 The resistance to earth shall be measured at the following locations:

a. At each ground provided for structure lightning protection. Resistance shall not exceed 5 ohms. Ifdriven rod electrodes for this purpose are interconnected with other grounding, the connectionsshall be opened for this test.

b. At one point of each grounding system used to ground electrical equipment enclosures and wiringsystem enclosures, such as metal conduits, cable sheaths or armor. Resistance shall not exceed5 ohms.

c. At grounds for lightning arresters. Resistance shall not exceed 1 ohm. These grounds aregenerally interconnected with enclosure grounds, and then the combined ground shall not exceed 1ohm.

R 18.2 Resistance to earth of system neutral grounds shall be measured. Resistance shall not exceed thefollowing:

a. For systems operating at 1000 volts or less between conductors: 5 ohms.

b. For high resistance grounded systems: 5 ohms.

c. For low resistance grounded systems operating at above 1000 volts: 1 ohms.

d. For systems grounded through Petersen coil: 5 ohms.

BATTERY CHARGING AND CHARGER TEST

O 19.1 All battery chargers shall be tested for proper operation and to verify that they can deliver their maximumrated output. A load discharge test shall be made to confirm that battery design capability can bedelivered.


Rev. 0 June 1997



TESTING OF PACKAGED UNIT SYSTEMS

O V 20.1 Packaged unit systems such as generators, variable speed drives, desalters, HVAC, etc. shall befunctionally tested to insure proper operation. A detailed step-by-step test procedure that will verify thecorrect operation of all circuitry in each package unit, shall be agreed with the Owners Engineer.

ALARMS, EMERGENCY CONTROL SYSTEMS AND OTHER EQUIPMENT TESTS

O 21.1 Alarms for all electrical equipment shall be tested for proper operation by causing alarms to sound undersimulated abnormal conditions.

I 21.2 All adjustable protective or control devices shall be checked and adjusted in accordance with drawingsor manufacturer's bulletins. This includes molded case circuit breakers, overload protective devices,pressure switches, limit switches, temperature switches, and level switches.

S,O 21.3 Emergency startup and shutdown systems shall be given a full operational test using the minimumpractical number of simulated operations.

O 21.4 Operational testing of motor-operated valves shall be checked by the following procedure:

a. Manually set valve midway between open and closed positions.

b. Bump motor by pushing CLOSE button immediately followed by pushing the STOP button. Whenrotation is correct, start valve "closing" and immediately operate closing torque switch manually.Motor should stop. Start valve "opening" and immediately operate opening torque switchmanually. Motor should stop. The above procedure shall be followed before allowing valve toreach fully open or fully closed positions. Limit switches on all motor operators shall be set in thefield.

S,O 21.5 Emergency power systems, emergency lighting, and uninterruptable power systems shall have fullfunctional tests to insure proper operation as shown on drawings or manufacturer's data.

Revision Memo9/68 Original Issue of Basic Practice1/73 Revision 14/92 Revision 26/97 Revision 0 - Original Issue of International Practice

Purpose Codes added throughout. Paragraphs Deleted. The following paragraphs contained in BP16-13-1 Revision2 have been deleted: 1.2, 4.1-3, 4.4a-c, g, h, 4.5-4.8, 4.9c, 4.10-12, 5.1-5.4, 6.1b, e, f, 8.1-8.8, 8.11-8.15, 9.3, 9.5c, 9.6,10.1, 11.1, 13.2, 14.5-14.7, 16.4, 16.5, 19.1, 22.1, 22.3, and 22.4. Low voltage of 600 V changed to 1000 V throughout.Par. 1.1 editorial changes. Par. 1.2 updated table of contents. Par 1.3 added statement for BP/IP cross referencing.Par. 2.1 U.S.A. locations reference was added. Par. 2.2 reference to NETA methodology and test values was added.Par. 2.3 modified to meet national standards. Par. 3.1 added optimum cost benefits. Par. 4.1 removed concretestrength requirement. Par. 4.2 seals now per manufacturers instructions. Par. 4.2d. deleted strength of concrete. Par.5.1 option for 2-tier design was added. sand depth and cover dimensions were revised. Par. 5.2b added bands atequipment location. Par. 6.1 now an asterisk paragraph, when specified. Par 7.1 marker intervals longer for traysystems. Par. 8.1 our practice was clarified. Par. 8.2 construction details surrounding splices have been deleted. Par.8.4 added ring lugs on CT wiring. Par. 9.1 added testing of pre-fabricated modules. Par. 9.2 specific 2-monthrequirement has been deleted. Par. 9.4 made consistent with site forms. Par. 9.5b note on minimum values wasdeleted. Par. 9.6 made an asterisk paragraph. Par. 9.7 two copies of test reports now required. Pars. 10.1 and 10.2references to PCB were removed. Par. 11.1 6,600 V changed to 7,200 V. Par. 11.2a end terminations added. Par. 11.4modified for consistency. Pars. 12.1, 12.2, 12.3 and 14.7 deleted the requirement to submit test data, () items. Par.12.2b added VFD feeders. Par. 13.2 added temperature device. Par. 14.2 now covers A-C and D-C controls. Pars.14.3c, 14.5 and 15.3 clarified that relay settings record data to be used. Par. 14.5 deleted list of possible test devices.Par. 14.6b primary injection testing added. Pars. 15.2 and 16.1 deleted ductor readings. Par. 17.2 condensed wording.Par. 17.3 minimum run-in period lowered to 2 hours with the proviso that bearing temperatures have stabilized. Pars.18.1 and 18.2 acceptable ground resistance values were lowered to meet customary present values. Par. 20.1 addedrequirement for detailed test procedures for all packaged unit systems.

Paragraphs renumbered:Old Par. No. New Par. No. Old Par. No. New Par. No.

1.3, 1.4 1.1, 1.2 14.1-4.4 11.1-11.44.4 4.1 15.1-15.3 12.1-12.34.9 4.2 16.1-16.3 13.1-13.3

6.1-6.3 5.1-5.3 17.1-17.8 14.1-14.86.4, 6.5 5.4 18.1-18.4 15.1-15.4

6.6 5.5 19.2 16.17.1 6.1 20.1 17.1

8.9, 8.10 7.2, 7.1 20.2 & 20.3 17.29.1, 9.2 8.1, 8.2 20.4 17.39.4, 9.5 8.3, 8.4 21.1, 21.2 18.1, 18.2

12.1-12.7 9.1-9.7 22.2, 22.3 19.113.1 10.1 23.1 20.113.3 10.2 24.1-24.5 21.1-21.5

Exxon Research and Engineering Company, 1992, 1997

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161301

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