16050-basic mater & methods

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SECTION 16050

BASIC MATERIALS AND METHODS

00000000PART 1 - GENERAL

1.1 DESCRIPTION:

A. The Work shall consist of furnishing and installation of all electrical materials asshown on the drawings and specified herein.

1.2 REFERENCES

A. SASO - Saudi Arabian Standards Organization

SASO 14 Pipes for Potable Water of Unplasticized Plastic (uPVC)

SASO 15 Method of Testing of Pipes for Potable Water of Unplasticized Plastic (uPVC)

SASO 33 Tungsten filament tamps for domestic and similar generallighting purposes" Performance requirements"

SASO 34 Tungsten filament tamps for domestic and similar generallighting

SASO 51 Switches for domestic purposes

SASO 52 Methods of test for switches for domestic purposes

SASO 55 PVC insulated cables with circular copper conductors

SASO 56 Methods of test for PVC-insulated cables and cords withcircular copper conductors

SASO 138 Methods of test for tubular fluorescent lamps for generallighting purposes

SASO 139 Tubular fluorescent lamps for general lighting purposes

SASO 146 Methods of test for starters for fluorescent lamps

SASO 147 Starters for fluorescent lamps

SASO 182 Standard voltages and frequency for A.C. transmission anddistribution systems

SASO 203 Safety Measure for Electrical Installations in ResidentialPremises

SASO 254 Methods of testing plastic conduits and fittings for electricalinstallations

SASO 255 Plastic conduits and fittings for electrical installations

ITCC in RiyadhResidential ComplexJ10-13300

16050-1Basic Materials &

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SASO 416 Methods of testing electric luminaries for road and streetlighting

SASO 417 Electric luminaries for road and street lighting

SASO 443 Methods of testing plugs and socket-outlets for householdand similar general use

SASO 444 Plugs and socket-outlets for household and similar generaluse

SASO 507 Methods of test for ballasts for tubular fluorescent lamps

SASO 533 Fiberglass reinforced polyester lighting poles (FRP) andmethods of testing

SASO 508 Ballasts for tubular fluorescent lamps.

SASO 608 Methods of test for air-cooled electric motors

SASO 609 Air-cooled electric motors

SASO 691 Ballasts for high pressure mercury vapor lamps

SASO 692 Methods of testing ballasts for high pressure mercury vaporlamps.

SASO 693 Dry-type power transformers

SASO 774 Methods of testing fiberglass reinforced polyester meter boxes

SASO 775 Fiberglass reinforced polyester meter boxes

SASO 979 Fire-resisting characteristics of electric cables

SASO 981 Electrical installation of buildings - Part 1: Scope, objectand fundamental principles

SASO 982 Electrical installation of buildings - Part 4: Protection for

safety - Chapter (42): protection against thermal effects

SASO 983 Electrical installation of buildings - Part 4: Protection forsafety - Chapter (43): protection against over-current

SASO 984 Electrical installation of buildings - Part 4: Protection forsafety - Chapter (45): Protection against under-voltage

SASO 985 Electrical installation of buildings - Part 4: Protection forsafety - Chapter (46): isolation and switching

SASO 986 Electrical installation of buildings - Part 4: Protection for

safety - Section (482): protection against fire



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SASO 1131 High pressure mercury vapor lamps

SASO 1132 Methods of testing high pressure mercury vapor lamps.

SASO 1267 Electrical installations of buildings: Part 4: Protection forsafety - Chapter 47: Application of protective measures forsafety - Section 470: General - Section

SASO 1268 Electrical installations of buildings: Part 4: Protection forsafety - Chapter 47: Application of protective measures forsafety - Section 473: Measures of protection

SASO 1271 Electrical installations of buildings: Part 5: Selection anderection of electrical equipment - Chapter 56: Safetyservices

SASO 1349 Circuit breakers for over current protection for house holdand similar installations

SASO 1350 High pressure sodium vapor lamps.

SASO 1351 Methods of test for high pressure sodium vapor lamps.

SASO 1415 Zinc coating on hot-dipped galvanized steel pipes

SASO 1416 Testing methods of zinc coating on hot-dipped galvanizedsteel pipes

SASO 1595 Common test methods for insulating and sheathing

materials of electric cables Part 4: Methods specific topolyethylene and polypropylene compounds - Section one:Resistance to environmental stress cracking - wrappingtest after thermal ageing in air-

SASO 1596 Common test methods for insulating and sheathingmaterials of electric cables Part 4: Methods specific topolyethylene and polypropylene compounds - Section two:Elongation at break after pre-conditioning - wrapping testafter pre-conditioning - wrapping

SASO 1612 Circuit -Breakers for equipment

B. IEC - International Electrotechnical Commission

IEC 56 High Voltage Alternating Circuit Breakers

IEC 228 Conductors of Insulated Cables

IEC 298 AC Metal-Enclosed Switch gear and Control Gear for Rated Voltages above 1 KV and up to 72.5 KV

C. ANSI - American National Standards Institute

ANSI C2 National Electric Safety Code



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ANSI C78.1 Dimensional and Electrical Characteristics of fluorescentLamps, Rapid Start Types

ANSI C80.1 Specification for Rigid Steel Conduit, Zinc Coated

ANSI C80.4 Specification for fittings for Rigid Metal Conduit

ANSI C81 Electric Lamp Bases and Holders

D. ASTM - American Standards for Testing and Materials

ASTM B 3 Specification for Soft or Annealed Copper Wire

ASTM D 256 Impact Resistance of Plastics and Electrical InsulatingMaterials

ASTM D 1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80and 120

ASTM D 2564 Solvent Cement for Polyvinyl Chloride (PVC) Plastic Pipeand Fittings

E. IEEE - Institute of Electrical and Electronics Engineering

37.13a Low Voltage AC Power Circuit Breaker Usedin Enclosures

F. NFPA - National Fire Protection Association

NFPA 70 National Electrical Code

G. UL - Underwriters Laboratories Inc

UL 1 Safety Standard for Flexible Metal Conduit

UL 6 Rigid Metal Electrical Conduit

UL 20 Safety Standard for General Use Snap Switches

UL 50 Safety Standard for Cabinets and Boxes

UL 67 Safety Standard for Panel boards

UL 83 Safety Standard for Thermoplastic Insulated Wires

UL 93 Safety Standard for Enclosed Switches

UL 198 Safety Standard for Fuses

UL 493 Safety Standard for Thermoplastic Insulated UndergroundFeeder and Branch Circuit Cables

UL 498 Safety Standard for Attachment Plugs and Receptacles



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UL 508 Safety Standard for Industrial Control Equipment

UL 514 Safety Standard for Electrical Outlet Boxes and Fittings

UL 651 Schedule 40 and 80 PVC Conduits

1.3 SUBMITTALS:

A. Complete list of materials and equipment proposed for incorporation in the work:

1. List shall include manufacturer's name and material or equipmentidentification such as styles, types or catalog numbers to permit readyand complete identification.

2. Include complete set of catalogs covering these submittals.

3. If catalog does not indicate compliance with appropriate standard asspecified, provide additional certification as to compliance.

B. Shop drawings shall be submitted for equipment not readily identifiable byinformation named above and will be submitted for, but not limited to, cabinetsand panel boards, busways and supports and under floor ducts.

C. Samples shall be submitted for all items specified herein for Engineers approvalprior to placing order for procurement

D. Testing Laboratory Label Required:

1. Label will satisfy requirement.

2. Listed Only: Submit copy of listing.

3. Unlisted or Labeled: Submit statements from certified testing laboratory oragency indicating that the item has been tested in accordance withrequired procedures and the product complies with all requirements.

E. Test Results: Provide test results for satisfactory performance of cables andother equipment for Engineers review.

1.4 TRANSPORTATION, HANDLING AND STORAGE:

A. All materials and equipments specified under this section shall be provided inmanufacturer's original new and unopened packing bearing manufacturer's nameand label.

B. Store materials not in actual use in covered and well-ventilated area and protectthem from dirt, dust, moisture, direct sunlight and extreme temperatures.

C. For further requirements follow manufacturer's written instruction regardingstorage and handling.

1.5 WARRANTY:

A. Submit written guarantee signed by the contractor and manufacturer for the



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period of 1 year from the date of substantial completion. The guarantee shallcover the repair and replacement of defective materials and workmanship asdirected by the Engineer. If manufacturer warranties any equipment for morethan one year as a standard practice such warranties shall also be submitted.

1.6 QUALITY ASSURANCE:

A. Manufacturer's Qualifications: Firms regularly engaged in manufacture of firealarm systems and components, whose products have been in satisfactory use insimilar services for not less than 5 years period, and be subject to approval ofEngineer.

B. Installer Qualifications: An experienced specialist sub-contractor who isauthorized by the system manufacturer, and subject to approval of the Engineer.

C. All the components and installations shall comply with the requirements ofspecified codes and standards. All equipments shall be suitable for altitude of thesite.

D. All the components and installations shall comply with the applicable seismicrequirements of project location as shown on structural drawings.

PART 2 - PRODUCTS

2.1 CONDUITS:

A. Interior Raceways: Raceways for wires inside the building, recessed in concreteand CMU, shall be rigid UPVC conduit conforming to SASO 254/255 or Class IV

to SASO 14/15 or Schedule 40 to ASTM D 1785 with proper type of fittings suchas bell ends or terminal adapters. Rigid UPVC conduits for use in wet walls andother locations shall comply with the requirements of NEC 352. Raceways forwires inside drywalls and above suspended ceiling (except where cable trays areshown) shall be EMT conforming to ANSI C80.3 or equivalent standards, withscrew fittings. All surface-mounted/exposed raceways (subject to mechanicaldamage) shall be rigid galvanized steel conduit conforming to SASO 1011 orANSI C80.1 or BS 1387. Fittings for steel conduits shall conform to ANSI C80.4or equivalent standards.

B. Raceways for exterior underground installations, except where duct banks areshown, use rigid UPVC conduit, Class IV conforming to SASO 14/15 or Schedule

40 conforming ASTM D 1785. Conduits under traffic areas shall be encased inconcrete.

C. Flexible conduits shall be of galvanized steel conforming to ANSI/UL 1. Flexibleconduits in wet areas shall be "Sealtight" type.

D. PVC Duct Banks: Duct banks for underground utilities shall be of rigid UPVCClass IV to SASO 14/15 or Schedule 40 conforming to ASTM D 1785 with propertype of fittings. Duct banks to be encased in concrete under traffic areas. Sizeshall be as shown on the drawings or as approved.

E. Concrete Duct Banks: Duct banks for underground utilities shall be of precastreinforced concrete Class 30 complying with DIVISION 3 CONCRETE. Size



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shall be as shown on drawings.

F. Unless indicated otherwise on the drawings, minimum size of conduits for interiorinstallations shall be 20 mm diameter and for exterior installations shall be 25 mmdiameter.

G. Cable Tray and Cable Ladder: Cable tray and cable ladders shall be mediumduty with return flanges. Cable tray, cable ladders and accessories shall bemanufacturer's standard constructed of sheet steel, hot-dipped galvanized aftermanufacture to ASTM A 123, Grade 35 or BS 729, Code G. Material thicknessand depth shall be manufacturer's standard suitable for the size of cable tray andcable ladder. Cable tray shall be perforated type and supplied with galvanizedsteel louvered covers (where required), support system and accessories,including standard bends, tees, crossings, risers, connectors, reducers andbonding jumpers. Cable ladders shall also be complete with supports andaccessories. Size of cable tray and cable ladders shall be as shown on thedrawings. Install warning signs with black letters on yellow ground, in English andArabic, at visible locations on/or near cable tray stating "WARNING! NOT TO BEUSED AS WALKWAY, LADDER, OR SUPPORT FOR LADDERS ORPERSONNEL".

H. Under-Floor Trunking: Shall be manufacturer's standard three-compartmenttrunking, two piece construction, manufactured of hot dipped galvanized sheetsteel to BS 2989 or ASTM A 123, Grade 35, and shall be supplied with coversand accessories, including bends and tees, junction boxes, access boxes fittedwith tray lid and stainless steel outer trim (where required), socket outlet plates,bends, rising bends, connectors, stop ends, offsets and other required fittings.Size shall be as shown on the drawings or as approved by the Engineer.Trunking shall be provided with multi-purpose access units as required.

1. For carpeted areas, provide open trunking system with modular lids flushwith the screed, body minimum 1.6 mm thick and lid minimum 3 mm thick.

2. For stone flooring areas, provide trunking suitable for burial in screed,body minimum 1 mm thick and lid minimum 1.2 mm thick.

2.2 WIRES AND CABLES:

A. General: All wires and cables shall be manufactured as per IEC/DIN/BS/ULstandards. All wires and cables shall have high conductivity copper conductors(not less than 98% copper purity), stranded wires for 2.5 mm and above and

solid for less than 2.5 mm. Stranding shall be as per ASTM, Class B concentriclay for AWG or MCM size conductors and circular non-compacted as per IEC228, Class 2 for metric size conductors. Size of wire/cable shall be as shown onthe drawings.

B. Feeder Cables:

1. Shall be 600V/1000V copper conductor, XLPE cross-linked polyethyleneinsulated 90oC, conforming to Standards mentioned above and shall beinstalled as indicated on the drawings.

2. Shall be 600V/1000V copper conductor, PVC insulated 85oC conforming

to Standards mentioned above and shall be installed as indicated on thedrawings.



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C. 0Branch circuit wires for power and lighting shall consist of 450V/750V copperconductors, Type NYA, PVC insulated 85oC conforming to Standards mentionedabove.

D. Direct Burial Cable: Shall be 600V/1000V copper conductor, XLPE cross-linkedpolyethylene insulated 90oC, shielded steel wire armored with PVC sheathing,conforming to Standards mentioned above and shall be installed as indicated ondrawings.

E. Exterior Lighting Cables: 600V/1000V copper conductors Type NYA, XLPEinsulated, 85oC conforming to the Standards mentioned above and shall beinstalled in PVC ducts as indicated on the drawings.

2.3 BOXES AND FITTINGS:

A. All boxes provided in the wiring or raceway system shall conform to SASO,ANSI/UL 514, BS or equivalent standards and shall suit the devices installed.

B. Boxes for ordinary locations or flush installations shall be sheet steel, zinc orcadmium plated, to meet code requirements. Boxes for flush exterior installationsshall be gasketed and hot-dipped galvanized.

C. Boxes for exposed locations subject to humid conditions shall be of cast metalwith threaded hubs. Finish shall be either cadmium/zinc electro-plate covered orhot-dip galvanized. Boxes for exposed exterior locations shall be similar exceptwith gaskets.

2.4 WIRING DEVICES:

A. General: Unless indicated otherwise, all wiring devices shall conform to SASO orBS or CSA or NEMA Standards. Where applicable use multi-gang switches withcombinations as required to group dissimilar switches and dimmers together.

B. Device Plates: All the device plates shall be one-piece type white color,manufactured of non-combustible mar-proof thermoset plastic with color-matching screws; type and design shall be as selected by the Engineer. Platesfor all outlets to suit the boxes and devices installed. Device plates for telephoneoutlets shall be able to accommodate a telephone jack.

C. Single or Duplex Receptacles: 60 Hz, two-phase, 3-wire, conforming to SASO,

BS NEMA 6-20R, voltage and rating as shown on drawings.

D. Special Receptacles: Single receptacles shall be 3-phase, 4-wire, groundingoutlets, porcelain with matching male plug conforming to SASO or BS, voltageand rating as shown on drawings.

E. GFCI Receptacles: Single or Duplex receptacles mounted in flush or exposedcast metal boxes with gasketed weatherproof cast metal plates and caps overeach receptacle opening, conforming to NEMA WD 6, with ground fault circuitinterrupter.

F. Weatherproof Receptacles: Duplex receptacles, mounted flush or surface

mounted, cast metal boxes shall have gasketed weatherproof cast metal platesand caps over each receptacle opening, conforming to NEMA WP-1, with rating



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and ground fault interrupter as shown on the drawings.

G. Wall Switches: Switches shall be Specification Grade AC Series, totally enclosedtumbler type with high strength thermoplastic bodies and rocker/toggles,complying with SASO 51 and 52, BS, CSA or ANSI/UL 20; rating as shown onthe drawings.

H. Disconnect Switches: Provide non-fused type; rating as indicated on Drawingsand shall include 2- and 3-phase switches; outdoor switches shall beweatherproof with NEMA 3 enclosure.

I. Push Buttons: Push buttons for lighting shall be general purpose, flush mounted,conforming to SASO or BS or equivalent, standard duty, non illuminated,watertight, rating as shown on the drawings. Push button stations shall be fornormal ON/OFF operations.

2.5 EQUIPMENT CONNECTIONS:

A. The limit of the work of the Electrical Contractor shall be up to the supplyterminals of the equipment or device to be supplied by other trades. TheElectrical Contractor shall be responsible for providing the power supply andwiring/cabling to the equipment or devices of other trades.

2.6 MOTOR CONTROL CENTERS:

A. Motor control centers shall comply with the requirements of ANSI/Ul 508 andshall include controllers and starters, HP rated. Items such as float switches,pressure switches and auxiliary relays shall have current and voltage ratings inaccordance with NEMA IC 1-18.20 for Class B relays. All items shall be for 60Hz

and shall be UL listed or conforming to IEC Standards.

2.7 MOTOR DISCONNECT MEANS:

A. Each motor shall be provided with a heavy-duty NEMA 3R for outdoordisconnection means and NEMA 1 for indoor disconnection means as requiredby ANSI/NFPA 70.

B. For single-phase motors, a single or double pole toggle switch, rated only foralternating current, shall be acceptable for capacities less than 50 amperes,

provided the ampere rating of the switch is at least 125% of the motor rating.Switch shall be lockable type.

C. Enclosed safety switches shall be horsepower rated in conformance withANSI/UL 98.

D. Switches shall disconnect all ungrounded conductors.

2.8 CONTACT IN MISCELLANEOUS CONTROL DEVICES:

A. Items such as float switches, pressure switches and auxiliary relays shallhave current and voltage ratings in accordance with NEMA IC 1-18.20 for Class

B relays. All items shall be for 60 Hz and shall be UL listed.



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2.9 SWITCHES AND CIRCUIT BREAKERS:

A. Refer to Section 16410 - SWITCHES AND CIRCUIT BREAKERS.

2.10 0GROUNDING RODS:

A. Refer to Section 16452 - GROUNDING.

2.11 LIGHTING:

A. For site lighting refer to Appendix H Site Lighting Package.

B. Lamps of the proper type, wattage and voltage rating shall be furnished andinstalled in each fixture.

C. Incandescent lamps shall be of voltage as indicated on drawings, inside frosted,screw base, Type: Edison, screw, E27; 16 A maximum protection, unlessotherwise specified.

D. Fluorescent lamps shall be of voltage as indicated on drawings, bi-pin type, withcool white color characteristics, shall not require starter switches, and shallcomply with ANSI C 78.1.

E. Fluorescent lighting shall be equipped with high power factor HF electronicballast with power factor not less than 95%. Dimmable electronic ballast shall beas indicated on lighting schedules shown on drawings.

F. Metal halide lamps shall consist of quartz discharge tube, containing highpressure mercury and mixture of metal halides housed in a hard glass outer

envelope and fitted with standard screw base. Lamps shall offer combination ofnatural white color appearance, and high luminous efficacy.

G. High pressure sodium vapor discharge lamps shall be of voltage as indicated ondrawings, screw base, Type: Edison, screw, E40.

H. Noise level of control gears for indoor fluorescent lighting fixtures shall notexceed 30dB.

I. Harmonic distortion shall not exceed NEMA standards.

J. Types of Lighting Fixtures:

K. Refer to drawings.

2.12 PHOTOELECTRIC CELL:

A. Photocell shall be flush mounted, weatherproof device for control of outdoorlighting as shown on the drawings. There shall be a detector which reads andtranslates the intensity of light in terms of switching on and off. It shall be madeof cadmium sulphic cell which is a semi-conductor device whose electricalresistance varies with the intensity of light falling on it.

B. A snap-action single pole switch shall be controlled by the current passing



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through the cell. A heater mounted on a bimetal strip shall be connected inseries with the cell and the two components shall be connected to a powersource. Variation in the resistance of the cell due to changes in daylight intensityvaries the heating effect of the bimetal strip and by careful calibration the switch-on point will be selected.

C. The cell shall be encased in an impact resistant translucent cover to protect itfrom damage and ultraviolet rays. The photoelectric cell shall be completelyweatherproof and not effected by moisture vibration or changes in temperature.Photocell shall be 250V, single pole, single throw, rated for load served. ON-OFFoperation shall be field adjustable.

2.13 TIME SWITCH:

A. Shall be synchronous 24 hour dial time switch with spring reserve to control theoperation and switching sequence of lighting circuits. The time switch shall berated 10 amps. at 230V and operated by a self-starting miniature synchronousmotor rated for operation at line voltage. Switch shall include a spring reservemechanism allowing up to 12 hours of operation in event of a power failure. Theswitch shall be housed in dust-proof enclosure with a glass window.

2.14 LIGHTING POLES

A. Galvanized Steel Poles: Provide manufacturer's standard hotdipped galvanizedsteel lighting poles of sizes shown on the drawings. Thickness of steel sheet andcross-section of the pole shall be suitable for the height of the pole and windvelocity of 160 km/hr blowing in most unfavorable direction. Poles shall becomplete with all required accessories and luminaire brackets. All components ofpoles shall be hot dipped galvanized after completion of fabrication. Minimum

thickness of zinc coating shall be 500 gm/mon both the inside and outside facesof the pole.

2.15 PROGRAMMABLE LIGHTINGMANAGEMENT SYSTEM (EIB):A. General: The Programmable Lighting Management System shall be designed &

developed in accordance with the European Installation Bus technology to coverlighting control (on/off and dimming) based on applications such as motion, time,daylight, manual switches, etc.

A two-wire bus cable shall link all sensors (push buttons, brightness sensors,motion sensors, timers, etc.) and actuators (on/off controllers, dimmingcontrollers, etc.) to each other. The bus cable shall be a twisted pair, screened &shielded with solid conductors and shall be capable of handling informationexchange and supplying power to the bus devices. Separate power supply to anyof the sensors and actuators shall not be acceptable. The bus cable shall be laidin the building in the form of a linear, star or tree structure similar to the powermains. Systems requiring fixed wiring configurations shall not be acceptable.

The system shall be completely de-centralized and programmable. The

programming shall be implemented via a PC or notebook computer located

anywhere in the system and having access level passwords. Programming vialocal system switches or with no password security shall not be acceptable. Any



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device in the system shall be accessed for programming from the PC location

without having to manipulate the device locally.

Each device in the system shall be addressable via a software programmable

physical address. Any device in the system shall communicate with any other

device via software programmable group addresses (telegrams). Each individualdevice will respond to only those group addresses for which they are

programmed to do so. There shall be an EEPROM storing the physical address,

group addresses & other software parameters for every device, thus making it

intelligent. No centralized processors or centralized memory storage devices

shall be permitted.

It shall be possible to program any of the devices on-line at the working site

without affecting any of the system devices or the system operation as well as

off- line prior to despatch of the material to site.

The entire system shall consist of bus lines each consisting of up to 64 devices.Two consecutive lines shall be connected to each other via line couplers that act

as network filters and also provide communication between devices in different

lines. In the event of failure of a device in one line, only the control functions

controlled by that device shall be affected and the device failure report shall be

printed out with the date and time of failure.

The power supply module feeding power to the network shall consist of a built in

back-up power to compensate short voltage interruptions of up to 200 ms. This

back-up power shall enable the system to put all actuators in a fail-safe position

(either on or off or as it is) in the event of power failure.

The diagnostic modules shall scan the system for any faults in the bus wiring and

display an alarm LED in the event of faults in the wiring.

Each of the devices shall have a built-in push button along with a LED. The LED

shall lit in the event the push button is pressed and if there is power to the

device, thus depicting that the device is communicating in the system.

The Lighting Management System shall be interfaced with the Building

Management System so as to monitor and control the required circuits from the

BMS workstation.

B. Lighting Control Modules (for 'On-off' switching control): The lighting controlmodules shall be DIN rail mounted consisting of four individually programmableintegral relays (contactors).

Each of these contactors shall be rated 16 A/ACI together with a switch- on

current carrying capacity of 500 A suitable for switching loads with high switch-on

peaks. Additional contactors shall not be used to control any of the lighting

circuits.

The output states of each of the four relays shall be displayed on the front. Each

of these relays shall be latch-on type with manual operation (override) possibleeven without power to the system.



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In the event of power failure or bus wiring failure or control module failure, each

of the four relays shall attain a pre-programmed fail-safe position ('On', 'Off or' As

it is').

The control modules shall be capable of been programmed with different

applications to suit site requirements for e.g. staircase lighting function whichswitches 'Off the relays after a pre-programmed time from the time it has

switched 'On' .The application for which a relay has been programmed shall

apply irrespective of the signal from which it is switched.

Each of the relays shall be capable of being programmed with its own 'on' and

'off delays which is applicable irrespective of the signal from which the relays are

switched.

The control modules shall receive its operating power supply from the same bus

cable without any other power supply. It should not operate on any 230/240 V AC

supply to avoid possible fire hazards.

Each of the control modules shall have its own individual address and shall becapable of being programmed from the central PC for the purpose of changing

parameters without the need to access the module locally.

C. Lighting Control Panels (LCP'S): There shall be a dedicated Lighting ControlPanel (LCP) for every DB. The LCP shall house the system devices and therelated control equipment depending on the no. Of circuits being controlled. Thisis to ensure the power wiring between the DB's and the control modules insidethe LCPs is kept to a minimum. The LCPs shall be surface mounted IP65

polycarbonate enclosures together with built-in DIN-rails for easy installation ofthe control equipment.

2.16 SURGE PROTECTIVE DEVICES

A. Surge protective devices are divided into lightning current arrestors and surgearrestors according to their tasks.

B. Surge protective devices are used for lightning protective equipotentialization ofpower supply lines as part of internal lightning protective measures. They mustbe able to discharge the vast amount of lightning current energy without

destruction and can be also used for limiting the surges to tolerable values forthe equipment. Surge protective devices shall be modular type and shall beharmonized with each other and coordinated with respect to their energycapabilities.

C. All communication systems, namely CCTV, DATA/VOICE, FACP, PA, ACCESSCONTROL, etc. shall be equipped with surge protective as shown on drawings.

2.17 MARKER TAPE:

A. Shall be detectable polyethylene plastic tape with metallic core, 150 mm width,100 micron nominal thickness and obtained from approved supplier. It shall be

continuously printed in Arabic and English alternately with words CAUTION;BURIED ELECTRIC/TELEPHONE LINE BELOW, as appropriate.



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2.18 MANHOLES AND HANDHOLES:

A. Shall be of cast-in-place reinforced concrete; sizes as shown on the drawings.Concrete shall be Class 30 conforming to Section 03300 - CAST-IN PLACECONCRETE, with Type 1 cement modified with silica fume, a pozzolanicmaterial. All the interior surfaces shall be coated with (two coats) 650 micron coaltar epoxy. All exterior surfaces shall have single layer, fully bonded, 4 mm thickwaterproofing membrane with 3 mm thick bitumen impregnated protection board.

B. Manhole Covers: Manhole covers and frames shall be of gray cast iron casting,heavy duty for traffic areas and medium duty for other areas, all complying withASTM A48 or BS 497, Appendix A. Type and size shall be as shown on thedrawings or selected by the Engineer. The words "ELECTRIC"/"COMMUNICATION " as appropriate, in Arabic and English shall be cast incovers.

C. Ladder Rungs (If required): Provide manufacturer's standard ladder rungs asshown on the drawings with dimensions, spacing and details as shown. Rungsshall be of 19 mm diameter solid galvanized steel bar molded to the requiredshape. Provided with non-slip surfacing on top of each rung. Ladder rungs shallbe installed during casting of reinforced concrete walls.

2.19 EXCAVATION AND BACKFILLING:

A. Refer to Section 02200 - EARTHWORK.

PART 3 - EXECUTION

3.1 GENERAL CONSIDERATIONS:

A. The installation shall conform to the applicable provisions of National ElectricalCode and National Electrical Safety Code.

B. The drawings indicate the extent and general location and arrangement ofequipment, conduits and wiring.

1. The Contractor shall study the drawings and details and in supplement tothe above mentioned drawings, all works to be done shall be inaccordance with approved shop drawings. All outlets and equipmentsshall be properly located and readily accessible.

2. Lighting fixtures, equipment and outlets shall be located to avoidinterference with mechanical or structural features and symmetricallylocated in coordination with ceiling systems.

3. Major equipment such as switchgear, transformer, etc. shall beassembled and installed in accordance with the manufacturer's

instructions.



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C. The Contractor shall provide power supply to all electrically powered equipmentor devices as required under other Sections of the Specifications and/or asshown on the drawings. The Contractor shall be responsible for power supplycables and wiring up to the power supply terminals or built-in isolators ordisconnect devices (if any) of the particular equipment or device.

D. Should the Contractor make equipment substitution or use equipment that mayresult in increased loads and changes in feeder and raceway sizes, and result inlarger protective equipment, such changes shall not be considered an additivechange order. The contractor shall provide calculations for load flow, voltage andshort ciruit for Engineers review and approval and modify feeder and racewaysizes accordingly without any extra cost and time.

E. Install pipe sleeve seals at all foundation and wall penetrations. Conduits, cablesand cable trays passing through exterior building walls shall be caulked weathertight. Seal conduits, cables and cable tray penetrations through fire barriers(walls and slab) using fire barrier penetration seals as specified in relevantSection of the Specifications or as approved by the Engineer.

3.2 DIRECT BURIAL CABLE INSTALLATION (If required):

A. Cables shall be laid out along the trench from moving reels. The cables shall belaid in the trench to allow for expansion and contraction.

B. Cables operating above 600 volts shall be buried at a minimum depth of 1000mm.

C. Cables shall have a horizontal separation of 1000 mm minimum from water andsewer pipelines.

D. Precast concrete blocks shall be provided over the primary cables. Concreteblocks shall be as detailed on the drawings. Caps shall be within 200 mm abovethe top of the cable, and shall be placed on sand which has been hand placedand compacted around the cables. Concrete for all caps shall be Type V cementand have a compressive strength of 14 MPa at 28 days. A continuous orange oryellow colored plastic maker tape minimum 150 mm wide shall be placed abovethe concrete cap 300 mm below grade level. The tape shall be imprinted with thewords "Caution Buried Electric Line Below" in Arabic and English spaced 1500mm on center.

E. Concrete cable markers, minimum 600 mm long and 200 mm square shall beplaced at all changes in direction and at all splices/joints, and as noted on plans.

F. Primary, secondary and street lighting cables crossing under street, drivewaysand other paved areas shall be installed in reinforced concrete encased ductbanks.

G. Primary cables shall be terminated with heat shrinkable termination or othertypes as per cable manufacturer's recommendations. Avoid splices as much aspossible.

H. The contractor shall submit names of their qualified MV cable jointers/splicers

and make a sample splice/demonstration in the presence of Engineer prior tostart of cable splicing for approval.



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3.3 WIRING METHODS:

A. Conduits:

1. Conduit system shall be installed in accordance with Articles 346 and 348of ANSI/NFPA 70.

2. Minimum size of raceways for branch circuit wiring shall be 20 mmdiameter.

3. Raceways shall be concealed within walls, ceilings and floors wherepossible and shall be kept 150 mm away from parallel runs of flues,steam or hot water pipes.

4. Raceways shall be supported and secured at intervals of not more than2440 mm.

5. Exposed raceways shall have runs installed parallel or perpendicular towalls, structural members or intersections of vertical planes and ceilings.

6. Field made bends and offsets for steel conduits shall be made withapproved hickey or conduits bending machine.

7. Changes in direction of runs shall be made with symmetrical bends orcast fittings.

8. Deformed raceways shall not be installed.

9. Care shall be taken to prevent the lodgment of plaster, dirt or trash inraceways, boxes, fittings and equipment during the course ofconstruction.

10. Clogged raceways shall be entirely freed of obstructions or shall bereplaced.

11. Steel conduits shall be fastened to all sheet metal boxes and cabinetswith locknuts.

12. Bushing shall be installed on the ends of all steel conduits and shall be ofthe insulating type where required by ANSI/NFPA 70. Bell ends or

terminal adapter and bushings shall be installed on the ends of all PVCconduits.

13. Raceways crossing expansion joints in concrete slabs shall be providedwith suitable expansion fittings or other suitable means shall be providedto compensate for the building expansion or construction.

14. Wooden plugs inserted in concrete or masonry shall not be acceptable asa base for raceways fastenings, nor shall raceways or pipe straps bewelded to steel structures.

15. Raceways shall be secured by pipe straps or shall be supported by wall

brackets, strap hangers or ceiling trapezes, fastened by wood screws onwood, toggle bolts on hollow masonry units, expansion bolts on concrete



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or brick and machine screws or welded threaded studs on steel work.

16. Nail-type nylon anchors or threaded studs, driven in by a powder chargeand provided with lock washers and nuts are acceptable in lieu ofexpansion bolts or machine or wood screws. Conduits larger than 25 mmdiameter shall not be installed inside structural masonry slabs.

17. Conduits larger than 25 mm shall not be installed inside structuralmasonry or slab.

B. Stubbed Conduits:

1. Conduits for connection to free standing equipment shall be provided witha short elbow and an adjustable brass top of coupling of brass or bronzethreaded inside for plugs, set flush with the finished floor.

2. Wiring shall be extended in rigid threaded conduit to equipment exceptwhere required, flexible conduit not exceeding 300 mm length may beused 150 mm above floor.

3. Screwdriver operated threaded flush plugs shall be installed in conduitsfrom which no equipment connections are made.

C. Flexible Connections of Short Length:

1. Flexible connections shall be provided for all motors and equipmentsubject to vibration or movement.

2. Liquid-tight flexible conduit shall be used in all wet locations, or wheremotors are installed exposed in mechanical equipment rooms.

D. Wires and Cables:

1. Conductors in raceways shall be thermoplastic insulated copper unlessotherwise specified or indicated.

2. Wire connectors of insulating material or solderless pressure connectorsproperly taped shall be utilized for all splices where possible.

3. Soldered mechanical joints, insulated with tape shall be kept to a

minimum.

4. Conductor sizes shall not be less than the sizes indicated.

5. All wire joints shall be covered with two thicknesses of insulating tape,covered with two layers of friction tape. All tapes shall be applied half-wrapped.

6. Branch circuit conductors shall not be smaller than 4 mm except forcircuits of more than 30 m from panel to load center, 6 mm shall be used.

7. Class 1 remote-control conductors shall be not less than 2.5 mm for

control wires.



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8. Coding and Identification:

a. Conductor identification of branch circuits shall be by color coding.Coding shall be as follows: Phase A = red, Phase B = yellow,Phase C = blue, Neutral = Black, Ground = green.

b. Conductors smaller than 16 mm must have colored insulation.Conductors 16 mm and larger may be wrapped with colored tapeat all boxes, panels, and switchboards.

c. Control circuit conductor identification shall be made by color-coded insulated conductors, plastic coated self-sticking printedmarkers, permanently attached stamped metal foil markers orapproved equivalent means.

d. Conductor identification shall be provided within each enclosurewhere a tap splice or termination is made.

e. Control circuit terminals of equipment shall be properly identified.

f. Terminal and conductor identification shall match that shown onapproved shop drawings. Hand lettering or marking shall not beacceptable.

E. Boxes and Supports:

1. Boxes shall be provided in the wiring or raceway systems whereverrequired for pulling of wires, making connections and mounting of devicesand fixtures.

2. Boxes for metallic raceways shall be of cast metal hub type when locatedin normally wet locations, when surface mounted on exterior surfaces, inhazardous areas and when installed exposed up to 2130 mm aboveexterior floors and walkways.

3. Boxes in other locations shall be sheet steel or plastic.

4. Each box shall have the volume required by ANSI/NFPA 70 for the

number of conductors enclosed in the box.

5. Boxes for mounting lighting fixtures shall not be less than 100 mm exceptthe smaller boxes may be used if required by the fixture configuration.

6. Boxes installed for concealed wiring shall be provided with suitableextension rings or plaster covers, as required.

7. Boxes for use in masonry walls shall be square cornered tile type orstandard boxes having square cornered tile type covers.

8. Cast metal boxes installed in wet locations and boxes installed flush with

the outside of exterior masonry surfaces shall be gasketed.



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9. Separate boxes shall be provided of flush or recessed fixtures whenrequired by the fixture terminal operating temperature, and fixtures shallbe readily removable for access to boxes unless ceiling access panelsare provided. In suspended ceilings, all fixture housing shall be supportedproperly from structural members.

10. Anchorage and Support:

a. Types of fasteners and methods of fastening in general shall beas specified hereinbefore for conduits.

b. In overhead spaces, cast metal boxes threaded to raceways shallnot necessarily be separately supported except where used forfixture support. Cast metal boxes having threadless connectorsand sheet boxes shall be supported directly from the buildingstructure or by bar hangers.

c. Where bar hangers are used, the bar shall be attached toraceways on opposite sides of the box and shall be supported withan approved type fastener not more than 356 mm from the box.

d. The Contractor shall refer to other drawings for informationconcerning depths of reinforcing steel to avoid conflict whenanchoring.

F. Boxes for Use with Raceways System:

1. Boxes shall not be less than 38 mm deep except where shallower boxesrequired by structural conditions are approved.

2. Boxes for other than lighting fixture outlets shall not be less than 100 mmsquare except that 100 mm x 50 mm boxes may be used where only oneraceway enters the outlet.

G. Pull Boxes:

1. Pull boxes shall not be less than the minimum size required byANSI/NFPA 70 and shall be constructed of galvanized steel or cast metalboxes.

2. Boxes shall be furnished with screw fastened covers.

3. Where several feeders pass through a common pull box, the feedersshall be tagged to indicate clearly the electrical characteristics, circuitnumber and panel designation.

4. Feeders of different voltages must be in separate boxes; also, signalcircuits must be in a separate box from power circuits.

3.4 DEVICE PLATES:

A. Device plates shall be installed with all four edges in continuous contact withfinished wall surface without use of mats or similar devices.

B. Plaster fillings shall not be permitted.



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C. Plates shall be installed vertically and with an alignment tolerance of 4 mm.

3.5 TELEPHONE SYSTEM RACEWAYS:

A. Where indicated, they shall be installed in accordance with requirements that nolength of run shall exceed:

1. 22.86 m for 20 mm.

2. 45.73 m for 25 mm or larger sizes.

3. Raceways shall not contain more than two 90o bends or the equivalent.

B. Additional pull or junction boxes shall be installed to comply with the foregoinglimitation whether indicated or not.

C. Inside radii of bends in conduits of 25 mm size or larger shall not be less than 10times the nominal diameter.

D. Nylon wire or pulling twine not less than 2.5 mm shall be installed in all branchraceways that are to remain empty with not be less than 203 mm of slack left ateach other end.

3.6 TESTS:

A. After the interior wiring system installation is completed, the Contractor shallconduct an operating test for approval.

B. The equipment shall be demonstrated to operate in accordance with therequirements of the specification.

C. Testing of the grounding system shall be made as specified in Section 16452 -GROUNDING.

D. Ground resistance (Megger) tests shall be performed on lighting and powercircuits.

E. Cable and circuit breaker testing, and testing in general shall be as per theNational Electric Code.

F. All phase balancing and loading tests shall be accomplished and data of suchtests shall be submitted to the Engineer.

END OF SECTION

ITCC in RiyadhResidential Complex 16050-20

Basic Materials &Methods

16050-basic mater & methods

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