16402_en.doc

SECTION 16402

INTERIOR DISTRIBUTION SYSTEMS

PART 1 - GENERAL

1.1

APPLICABLE PUBLICATIONS

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

International Electrotechnical Commission Publications (I.E.C.)

IEC 60034

(2004) Rotating Electrical Machines.

IEC 60051

(1997) Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories.

IEC 60076-2

(1993) Temperature Used in Transformers.

IEC/TR 600 83

(2004) Plugs and Socket Outlets for Domestic and Similar General Use standardized in member countries of IEC.

IEC 60085

(2004) Thermal Evaluation and Classification of Electrical Insulation.

IEC 60189

(1986) Low Frequency Cables and Wires with PVC Insulation and PVC Sheath.

IEC 60227

(1998) Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including 450/750 V.

IEC 60228

(2004) Conductors of Insulated Cables.

IEC 60332

(2004) Tests on Electric Cables Under Fire Conditions.

IEC 60364-5-54

(2002) Electrical installations of buildings - Part 5-54: Selection and erection of electrical equipment - Earthling Arrangements and Protective Conductors

IEC 60423

(1993) Outside Diameters of Conduits for Electrical Installations and Threads for Conduits and Fittings.

IEC 60439-1

(2004) Low-voltage switchgear and controlgear assemblies Part 1: Type-tested and partially type-tested assemblies

IEC 60439-2

(2005) Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways).

IEC 60445

(1999) Identification of Apparatus Terminals and General Rules for a Uniform System of Terminal Marking Using an Alphanumeric Notation.

IEC 60502

(2004) Extruded Solid Dielectric Insulated Power Cables Rated Voltages from 1 kV to 30 kV.

IEC 60529

(2001) Classification of Degrees of Protection Provided by Enclosures.

IEC 60529

(2001) Degrees of protection provided by enclosures (IP Code)

IEC 60614

(1994) Specification for Conduit for Electrical Installations.

IEC 60616

(1978) Terminal and Trapping Markings for Power Transformers.

IEC 60669

(2000) Switches for Household and Similar Fixed Installations.

IEC 754-1

(1994) Test on Gases Evolved During Combustion of Electric Cables.

Italian Electrotechnical Commission (CEI) Publications

CEI 2-3

(2000) Rotating Electrical Machines.

CEI 2-5

(1998) Three Phase Synchronous Machines-Methods for Determining Synchronous Machine Quantities from Tests.

CEI 2-6

(1999) Methods for Determining Losses and Efficiency of Rotating Electrical Machines from Tests.

CEI 2-8

(2003) Rotating Machines. Terminal Markings and Direction of Rotation of Electrical Machines.

CEI 7-6

(1997) Tests of Hot Dip Galvanization for Ferrous Materials for Electrical Systems and Lines.

CEI 11-17

(1997) Electric Power Generation, Transportation and Distribution Systems. Cable Lines.

CEI 85-3

(1999) Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories.

CEI 14-8

(1998) Dry power Transformers.

CEI EN 60454-3

(1999) Adhesive Tapes for Electrical Purposes.

CEI 16-2

(2000) Identification of Apparatus Terminals.

CEI 16-4

(2000) Identification of Insulated Conductors and Bare Conductors by Means of Colors.

CEI 17-5

(2004) Automatic Circuit Breakers for Rated Voltages not Greater Than 1000 V a.c. and 1200 V d.c.

CEI 17-9/1

(2000) Disconnect Switches for Rated Voltage More Than 1000 V a.c. and less then 52 kV.

CEI 17-11

(2000) Operating Switches, Disconnectors, Air Breakers-Disconnectors and Fuses, Combined Units for Rated Voltage not Greater Than 1000 V a.c. and 1500 V d.c.

CEI 17-13

(2000) Low Voltage Protection and Control Prefabricated Equipment (BT Panelboards). Part I: Regulations for in Series (AS) and non-in Series (ANS) Equipment - ACF (Panelboards) for Voltages not Greater Than 1000 V a.c. and 1500 V d.c.

CEI 20-13

(1999) Cables Insulated with Butylic Rubber With Insulation Degree Greater Than 3

CEI 20-20

(2003) PVC-Insulated Cables With Rated Voltages not Greater Than 450/750 V.

CEI 20-22/2

(1999) Fire Retardant Cables Test.

CEI 20-36

(2002) Fire resistant cable test.

CEI 20-24

(1998) Splices and Terminals for Energy Cables.

CEI 23-3

(2004) Automatic Overcurrent Circuit Breakers for Domestic Appliances and Similar for Rated Voltage not Greater than 415 V a.c.

CEI 23-34

(1997) Not removable bipolar plug with cable to connect class II devices for domestic appliance.

CEI 23-50

(1998) Plug-Outlets for Domestic Appliances and Similar.

CEI 23-39

(1997) Conduit system for electrical installation. Part 1: general prescription.

CEI 23-54

(1996) Conduit system and accessories for electrical installation. Part 2-3: special prescription for rigid conduit.

CEI 23-11

(2004) Switches and Selectors for Domestic Appliances.

CEI 23-12

(2000) Plug-Outlets for Industrial Appliances.

CEI 23-42

(2005) Ground Fault Breakers Without Integral Overcurrent Releases for Domestic Appliances and Similar.

CEI 23-44

(1999) Ground fault breakers with integral overcurrent releases for domestic appliance and similar

CEI 61-168

(2003) Motor Compressors - Sealed Hermetic Type.

CEI 64-8

(2004) Electrical Systems With Rated Voltages not Greater Than 1000 V a.c. and 1500 V d.c.

CEI 70-1

(1997) Degree of Protection of the Enclosures.

Classification.

Italian Materials Standards (UNEL)

UNEL 00722-78

(2002) Cable Color Code.

UNEL 35747

(1997) Polyvinyl Chloride Insulated Energy Cables. Unipolar Cables Unsheathed for General Use. Rated voltage Vo/U: 450/750 V.

UNEL 37118

(1972) Rigid PVC Conduits and Accessories.

UNEL 35024/1

(1997) Elastomeric and thermoplastic insulated power cables for rated voltages not exceeding 100 V a.c. 1500 V d.c. – Continuous current capacities for cables laid in air.

UNEL 35024/1

(2000) Elastomeric and thermoplastic insulated power cables for rated voltages not exceeding 100 V a.c. 1500 V d.c. – Continuous current capacities for buried cables.

Italian Quality Mark Institute (IMQ)

Testing and Approval of Materials.

Italian National Institute for the Unification of Standards (UNI) Publications

UNI 7683

(1997) Seamless and Welded Unalloyed Galvanized Steel Conduits for Electrical Use.

1.2

GENERAL REQUIREMENTS

General requirements include those specified in Section 16050, "Basic Electrical Materials and Methods" and as specified herein. The work includes the provision of new interior electrical systems. Each system shall be complete and ready for operation according to the requirements specified herein. The contract drawings indicate the extent and general arrangement of equipment, fixtures and conduit and wiring systems.

1.3

SERVICE INTO BUILDINGS

Underground service conductors and associated conduits shall be continuous from the main switchboard to the substation.

1.4

SUBMITTALS

1.4.1 Manufacturer's Data

Consisting of manufacturer's data in sufficient detail to verify compliance with the contract documents.

a.

Metal Tubing b.

PVC Conduit c.

Conduit Fittings d.

Rigid Steel Conduit e.

Conductors f.

Outlet and Splice Boxes g.

Receptacles h.

Toggle Switches i.

Panelboards j.

Circuit Breakers k.

Transformers l.

Terminal Cabinets m.

Disconnect Switches n.

Telephone and Data Outlets o.

Telecommunications Cables p.

Multi-port Patch Panels q.

CCTV Outlets r.

CCTV Cable s.

Cable Tray

1.4.2 Shop Drawings

Shall include, but shall not be limited to, the following:

Panelboards:

Overall dimensions, front view and sectional views, metal gauges.

b.

Bus arrangements including dimensions and ampere rating of all bus bars.

c.

Type and spacing of bus supports.

d.

Maximum short circuit bracing.

e.

Circuit breaker type, interrupting rating, trip setting.

f.

Lug size.

g.

Provision for future.

Transformers:

Overall Dimensions.

b.

Transformer Rating (kVA).

c.

Impedance Value.

d.

Tap Ratings.

e.

Sound Level (dB).

f.

Accessories.

g.

Installation details.

h.

Other details of construction.

1.4.3 Test Reports, Transformer Tests

Perform tests classified as "routine" in accordance with CEI 14-4, IEC 551, and IEC 76.2, on each transformer and submit the results for approval in report form. Submittal shall also contain the results of "design" and "prototype" tests that were made on transformers electrically and mechanically equal to those specified.

1.5

QUALITY ASSURANCE

In each standard referred to herein, consider the advisory provisions to be mandatory, as though the word "shall" has been substituted for "should" wherever it appears. Interpret references in these standards to "authority having jurisdiction", or words of similar meaning, to mean Contracting Officer.

PART 2 - PRODUCTS

2.1

GENERAL

Each item shall meet the requirements of these specifications and of the publications reference herein. All items shall be new, unless specified or indicated otherwise.

2.2

CONDUIT AND FITTINGS

Wiring raceways shall be metal tubing, galvanized rigid steel conduit, or rigid polyvinyl chloride tubing (PVC) as indicated on the drawings and specified herein. The number of conductors permitted in conduit, whether steel or PVC, shall conform to the applicable provisions pf the National Electric Code for the conduit of the equivalent internal diameter. In no case shall conductor fill exceed 40 percent of conduit internal cross-sectional area.

2.2.1 Rigid Steel Conduit

UNI 7683, IEC 614 shall have an interior and exterior zinc coating of uniform quality and appearance throughout all surfaces. They shall consist of steel tubes with threaded fittings, couplings, and connecting devices. The tubes shall have nominal trade sizes in inches, outside diameters and wall thickness equal to standard American "Schedule 40" steel pipe. Rigid conduit and fittings shall be manufactured specifically for electric wiring purposes. When manufactured by a continuous weld process, weld beads both inside and outside the tube will be completely removed prior to galvanizing. Tube, coupling and fitting threads shall be tapered to conform to the normal iron pipe thread taper 3/4 inch per foot (1/16 or 6.25%). Rigid Steel Conduit shall have a minimum size of 1/2-inch trade size. All conduit sizes on the drawings are given in inches and shall have minimum interior diameter as given in the following table:

Nominal Exterior

Size

Diameter

Minimum Interior

(inches)

(mm)

Diameter (mm) 1/2

21.7

17.0

3/4

27.1

22.4

34.0

28.2

1/4

42.7

36.9

1 1/2

48.6

42.8

60.7

54.2

2 1/2

76.3

69.8

89.4

82.9

114.9

106.8

2.2.2 Metal Tubing

Metal tubing shall be thin wall steel tubing manufactured without fittings or threads and coated with a uniform electro-galvanized finish on the exterior. The interior shall be smooth and free of burns or welds and shall be protected with an antioxidant. The raceways shall consist of the steel tubes with compression type couplings and connecting devices. The tubes and fittings shall be manufactured for electrical wiring purposes. Metal tubing shall conform to UNEL 37113.

All conduit diameter sizes on the drawings are given in inches and shall have corresponding minimum interior diameters as given in the following table:

Diameter(mm)

1 1/4

2.2.3 Rigid Polyvinyl Chloride (PVC)

PVC conduit shall be of a nonflammable self-extinguishing, type RK 15 in accordance with CEI 23-8, UNEL 37118, for rigid conduits, UNEL 37121 for flexible conduits and shall bear the Italian mark of quality (IMQ). Each length of conduit shall be furnished with one standard coupling. Joints shall be made with solvent cement.

All conduit sizes on the drawings are given in inches and shall have corresponding diameters as given in the following tables:

Diameter(mm)

1 1/4

The fittings shall be of the same material as the conduit.

2.2.4 Connections to movable equipment shall be flexible metal conduit with the number of conductors indicated. Flexible zinc-coated steel conduit with an extruded, moisture and oil-proof PVC jacket, shall be provided for connections to equipment subject to vibration and equipment in wet locations and areas subject to abnormal moisture. Watertight connectors shall be used with PVC covered conduit.

2.2.4.1 Liquid-Tight Flexible Metal Conduit (Steel)

IMQ tested with protection degrees of IP 67 in accordance with CEI 64-8.

2.2.5 Fittings for Metal Conduit and Flexible Metal Conduit

All ferrous fittings shall be cadmium or zinc-coated.

2.2.5.1 Fittings for rigid metal conduit shall be cast threaded type. Split couplings are not acceptable.

2.2.5.2 Fittings for PVC conduits shall be PVC for solvent cement, CEI 23-8.

2.3

CABLE TRAYS

Cable trays shall form wireway system, and shall be of nominal 60 mm depth. Cable trays shall be constructed of steel that has been zinc-coated after fabrication. Trays shall include splice and end plates, dropouts, and miscellaneous hardware as required. Edges, fittings, and hardware shall be finished free from burrs and sharp edges. Fittings shall have manufacturer’s minimum standard radius. Radius of bends shall be 30 mm. The cable tray filled will not exceed 50% of its capacity in any case.

2.3.1 Ventilated Trough-Type Cable Trays

Sized as indicated. Cable tray shall have load capacity to handle the indicated cables when supported 2.3 meters on center with a safety factor of 1.5.

2.3.2 Outlet boxes and covers

CEI 64-8 for the degrees of protection, cadmium- or zinc-coated if of ferrous metal.

2.3.3 Boxes for PVC conduits shall be fire resistant resin compound. Boxes for wiring devices shall have metallic device holders and cover plate to match the device.

2.3.4 Boxes for steel conduits shall be light alloy die-cast metal with threaded hubs, metallic cover, cadmium screws and gaskets for IP-54 protection grade.

2.3.5 Boxes shall be in accordance with CEI norms and not less than 100mm by 100mm by 63 mm.

2.3.6 Cabinets, junction boxes, and pull boxes

CEI 64-8 for protection degrees, hot-dip zinc-coated if of sheet steel.

2.3.7 Wires and cables

Wires and cables shall meet the applicable requirements of CEI and UNEL for the type of insulation, jacket and conductor specified or indicated. Wires and cables manufactured more than 12 months prior to date of delivery to the site shall not be used.

2.3.8 Minimum Conductor Sizes

Minimum sizes for branch circuit conductors shall be:

Receptacle branch circuits

1.5 mm2

Lighting branch circuits

2.5 mm2

Control circuits

1.5 mm2

2.3.8.1 Color Coding

Provide color coding for all branch, control, and signaling circuit conductors in single core or multicore cables. Color shall be green-yellow for grounding conductors, and light blue for neutrals. The color of the phase conductors shall be as follows (UNEL 00722-78):

Phase Conductors

Phase L1:

Black

Phase L2:

Brown

Phase L3:

Red

Neutral:

Light Blue

Grounding Conductor:

Green Yellow

2.3.8.2 Branch Circuit and Control Wiring up to 16 mm2 in Interior Locations:

Conductor:

Stranded tinned annealed copper conductors

Insulation:

450/750 V PVC insulation with a normal maximum operating temperature of 70 deg C in accordance with UNEL 35747 and CEI 20-20 (N07V-K)

2.3.8.3 Feeder Conductors and branch circuit wiring in exterior locations:

Conductor:

Stranded tinned annealed copper conductors

Insulation:

600/1000 V Ethylene propylene rubber (EPR) operating temperature: 90 deg C according to UNEL 35375, CEI II 20-22 and CEI 20-13 (FG70 R)

2.3.8.4 Fire Alarm Cable

Multicore stranded copper conductors minimum 1.0 sq mm. Special grating material insulation to be 750 Volt, and external sheath in AFUMEX material in accordance with IEC 331 and CEI 20.36.

2.3.8.5 Ground Conductors

Provide a ground conductor with each circuit. The ground conductor shall be sized in accordance with CEI 11-8 and as shown on drawings. The ground conductor shall be insulated with a green/yellow PVC sheath.

2.4

SPLICES AND TERMINATION COMPONENTS

CEI 20-24, as applicable for wire connections, and CEI 15-15 for insulating tapes. Connectors for wires 6 sq. mm and smaller shall be insulated pressure-type in accordance with CEI 20-24. Provide solderless terminal lugs on stranded conductors.

2.5

DEVICE PLATES

Provide IMQ/CE-marked, one-piece device plates for outlet and fittings to suit the devices installed. Plates on unfinished walls and on fittings shall be of zinc-coated sheet steel or cast metal and have round or beveled edges. Plates on finished walls shall be urea or phenolic, minimum 2.5 mm wall thickness. Plates shall be the same color as the receptacle or toggle switch with which it is mounted. Screws shall be machine type with countersunk heads in a color to match the finish of the plate. The use of sectional type device plates will not be permitted. Plates installed in wet locations shall be gasketed.

2.6

SWITCHES

2.6.1 Toggle Switches

Switches shall be of the totally enclosed rocker type with bodies and handles of ivory phenolic compound. Wiring terminals shall be side wired screw type. Not more than one switch shall be installed in a single gang position. Switches shall be rated 16 amperes, 250 V for use on alternating current only, shall be suitable for the control of lamp loads up to their full rated capacity. Switches shall be Ticino Magic, Living Series or approved equal.

2.6.2 Disconnect Switches

CEI 17-11. Switches serving as motor-disconnect means shall be kVA rated. Switches shall be heavy duty, fused or nonfused, single throw, quick-make, quick-break 2 or 3 pole, 500 V, as required, with indoor enclosure unless otherwise noted. Fused switches shall be provided with fuse holders to accept the fuse size indicated.

2.7

RECEPTACLES

CEI 23-5, heavy-duty, grounding type. Bodies shall be of ivory thermosetting plastic supported on a metal mounting strap. Wiring terminals shall be of the screw type, side wired. Connect grounding pole to the mounting strap. Receptacles shall be Ticino Magic, Living Series or approved equal. Ratings and configuration shall be as follows:

220V, 50 Hz receptacles shall be rated 10/16A 250 volts European type 2 pole, 3 wire, round pin, grounded type suitable for plug types with grounding poles. The receptacles shall be single or duplex type as shown on the drawings.

b.

120V, 50 Hz duplex receptacles shall be U.S.A. type rated 15 amperes, 125V, 2 pole, 3 wire grounding type (USA designation NEMA 5-15R).

2.7.1 Weatherproof Receptacles

Provide in a flush box with a gasketed, weatherproof, cover plate with a spring-hinged door, rated IP-55.

2.7.2 Special Receptacles

In accordance with CEI 23.12, CEE configuration, ratings as indicated. Furnish one matching plug with each receptacle.

2.7.3 Plugs

Provide heavy-duty rubber-covered 3, 4, or 5 wire cord of the required size, install the plugs thereon, and attach to the equipment. The plugs shall be as listed with the receptacles, complete with grounding blades. Where equipment is not available, turn over the plug and cord assemblies to the Government.

2.8

PANELBOARDS

2.8.1 Panelboards shall conform to IEC 439-1, IEC 144 and CEI 17-13 standards.

Panelboards shall be ABB SACE, Ticino Series or approved equal.

2.8.2 Panelboard enclosures shall be sheet steel with enamel paint finish, hinged door with key lock and tempered glass panel. Degree of protection IP 407.

2.8.3 Interior components shall be mounted on backplate of reinforced steel for rigid support and accurate alignment.

2.8.4 One flat key tumbler cylinder type nickel plated door lock with two keys per lock shall be provided for each panelboard. All panelboard locks shall be keyed alike.

2.8.5 Provide enclosure grounding in accordance with CEI.

2.8.6 Busbars

Rectangular cross section, hard drawn, high conductivity copper capable of carrying the fault current indicated. Busbars shall be supported on shock resistant non tracking insulators. Neutral bus shall be same rating as the phase bus. The separate ground bus shall be sized according to CEI 11-8. Branch circuit breaker bus bars shall be enclosed type similar to the multiclip system by ABB SACE, Ticino Modular Series or approved equal.

2.8.7 Panelboards

The panelboards shall be factory built assemblies, dead front circuit breaker equipped.

2.8.7.1 The branch circuit panelboards shall be designed for 380/220V, 3 phase + N + ground, 50 Hz operation and 208/120VV, 3 phase + N + ground, 50 Hz where required. Continuous current rating and short circuit rating of the busbars shall be as indicated. Circuit breakers shall be molded case thermal magnetic.

2.8.8 Nameplates

2.8.8.1 Each panelboard shall have an engraved nameplate indicating system voltage, frequency, and panelboard designation.

2.8.8.2 A directory shall be mounted inside of each panelboard. The panelboard directory shall be typed, indicating the equipment supplied by each circuit breaker and the conductor size.

2.8.9 Circuit Breakers

CEI 17-5, category P.2, molded case, thermal magnetic type with number of poles, current rating and interrupting rating as indicated on the drawings. Breaker terminals shall be CEI listed as suitable for the type of conductor provided.

2.8.9.1 Multipole Breakers

Provide common-trip type with a single operating handle. Breaker design shall be such that an overload in one pole automatically causes all poles to open. Maintain phase sequence throughout each panel so that any three adjacent breaker poles are connected to phases L1, L2, and L3, respectively.

2.8.9.2 Circuit Breaker with Ground-Fault Circuit Interrupter

CEI 23-18. Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect a current imbalance of approximately 30 milliamperes.

2.9

FUSES

Provide a complete set of fuses for each fusible switch. Time-current characteristics curves of fuses serving motors or connected in series with circuit breakers or other circuit protective devices shall be coordinated for proper operation; submit coordination data for approval. Fuses shall have a voltage rating not less than the circuit voltage.

2.10

DRY TYPE TRANSFORMERS

Transformers shall be indoor dry-type as indicated. Transformers provided under this specification shall conform to IEC Standard 76.2, 726 and CEI 14-4.

2.10.1 Rating

The transformers shall be general-purpose-type, self-cooled, suitable for operation on a 50 hertz alternating current system and shall be rated as indicated.

2.10.2 Taps Deenergized Operation

Provide taps which allow transformers to deliver rated kVA at any setting. Taps shall be four two 2-1/2 percent full capacity above and two 2-1/2 percent full capacity below rated primary voltage.

2.10.3 Sound Level

Sound level shall not exceed 48 dB, as determined in accordance with IEC Standard 551. Provide transformers with integral or external vibration and noise isolating and damping supports.

2.10.4 Construction

2.10.4.1 Core and Windings

a.

Core: Grain-oriented, non-aging, silicon steel rigidly braced to withstand rough handling during shipment and installation.

b.

Windings: The transformer shall have two separate windings. The windings shall have 1.0 kV insulation class and shall have basic insulation level (BIL) of 10.0 kV. The windings shall be suitably insulated from each other and from non-current carrying parts.

c.

Vacuum Impregnation: Vacuum impregnate the complete core and winding assembly a minimum of two times in a vacuum tank capable of developing a vacuum of 660 millimeters of mercury. Follow each impregnation cycle by a curing and high temperature baking cycle.

2.10.4.2 Insulation

Dry-Type Units: Provide 220 degree C insulation system designed for an average winding temperature rise not to exceed 150 degrees C in a maximum ambient of 40 degrees C as measured by the resistance method with 100 percent nameplate load. Insulation system shall allow transformer to have a minimum overload capacity of 10 percent at rated voltage without exceeding specified winding temperature rise above 40 degrees C maximum ambient.

2.10.5 Enclosure

Transformer enclosure shall be ventilated type with International Protection Code IP:23 in accordance with IEC 529.

2.10.6 Terminations

The transformer terminations shall accommodate the required primary and secondary feeder connections. For dry-type general purpose transformers, supply and load connections shall be suitable for 75 degrees C copper wiring and cable termination compartments shall be located at the lower end of the cabinet in the path of incoming cooling air stream.

2.10.7 Lifting Facilities

Provide means for lifting the complete transformer. The bearing surfaces of the lifting means shall be free from sharp edges.

2.10.8 Nameplates

Provide aluminum or stainless steel nameplates as per Section 16050, indicating manufacturer, model, kVA, voltage, phase and wiring diagram for transformer.

2.11

MOTORS

CEI 2-3, except sealed (hermetic-type) motor-compressors shall meet CEI 61-18. Determine specific motor characteristics to ensure provision of correctly sized starters and overload heaters. Motors shall be designed to operate at full capacity with a voltage variation of plus or minus 10 percent of the motor voltage rating.

2.11.1 Motor Sizes

Motors rated 1.0 kW and smaller shall be suitable for operation at 220V, 50 Hz single phase. All other motors shall be suitable for 380V, 50 Hz three phase supply. The approximate size of each motor is indicated. When equipment size provided differs from the size indicated or specified, the Contractor providing the equipment shall make the necessary adjustments to the wiring, disconnect devices, and branch circuit protection to accommodate the equipment actually provided.

2.11.2 Each motor shall have sufficient capacity to start and operate the machine it drives without exceeding the motor nameplate rating at the speed specified or at any speed and load which may be obtained by the drive actually furnished.

2.12

NAMEPLATES

Each motor shall have a nameplate securely attached to the motor frame with the following minimum amount of information:

1.

Manufacturers name, serial number or date code.

2.

kW output.

3.

Temperature rise.

4.

R.P.M. at rated load.

5.

Frequency.

6.

Number of phases.

7.

Voltage.

8.

Rated load amperes.

2.13

MOTOR CONTROLLERS

All controllers shall have thermal overload protection in each phase. Magnetic-type motor controllers shall have under voltage protection when used with momentary-contact pushbutton stations or switches and shall have under voltage release when used with maintained-contact pushbutton stations or switches. When used with a pressure, float, or similar automatic-type or maintained-contact switch, the controller shall have a hand-off-automatic selector switch. Connections to the selector switch shall be such that only the normal automatic regulatory control devices will be bypassed when the switch is in the "hand" position. All safety control devices, such as low and high pressure cutouts, high temperature cutouts, and motor overload protective devices, shall be connected in the control circuit in both the "hand" and the "automatic" positions. Control circuit connections to any hand-off-automatic selector switch or to more than one automatic regulatory control device shall be made in accordance with an indicated, or a manufacturer's approved, wiring diagram. The selector switch shall have means for locking in any position. For each motor not in sight of the controller, the controller disconnecting means shall be capable of being locked in the open position or a manually operated, non-fused switch which will disconnect the motor from the source of supply shall be placed within sight of the motor location. Overload protective devices shall give adequate protection to the motor windings, be of the thermal inverse-time-limit type, and include a manual-reset push-button on the outside of the motor controller case. The cover of a combination motor controller and manual switch or circuit breaker shall be interlocked with the operating handle of the switch or circuit breaker so that the cover cannot be opened unless the handle of the switch or circuit breaker is in the off position.

2.13.1 Enclosures for Starters and Controllers

CEI 70-1.

2.13.2 Pushbutton Stations

Provide with "start-stop" momentary contacts having one normally open and one normally closed set of contacts, and ruby indicating lights to indicate when the motor is running. Stations shall be heavy-duty, oil-tight design.

2.13.3 Pilot and Indicating Lights

Provide transformer, resistor, or diode type.

2.13.4 Terminal Blocks

CEI 16-2.

2.13.5 Manual Starters

Single pole designed for surface or flush mounting with overload protection and pilot light.

2.13.6 Reduced-Voltage Controllers

Provide for polyphase motors 30 KW and larger. Reduced-voltage starters shall be single-step closed transition autotransformer or reactor, and shall have an adjustable time interval between application of reduced and full voltages to the motors. Wye-delta reduced voltage starter or part-winding increment starter having an adjustable time delay between application of voltage to first and second winding of motor may be used in lieu of reduced voltage starters. Wye-delta starters shall be of the closed transition type.

2.16

GROUNDING AND BONDING

Shall be in accordance with CEI 11-8.

2.16.1 Grounding System

Shall comply with CEI. As therein required, and required by these specifications and drawings. The following subsystems shall be bonded together to form the grounding system:

Earth electrode subsystem (See Section 16303, "Underground Electrical Work") b.

Fault protection subsystem c.

Potential equalization subsystem

2.16.1.1 Equipment Grounding System (Fault Protection Subsystem)

Except where specifically otherwise indicated, all non-current carrying metal parts of electrical equipment, metallic raceway systems, lighting fixtures, appliances, machinery and electrical outlets shall be grounded by a separate insulated grounding conductor of the same size as the phase conductors (unless otherwise noted on the drawings). The equipment grounding system shall be complete and continuous from point of connection to the grounded component to the main switchboard ground bus at the service entrance. Bond this subsystem to the earth electrode subsystem as indicated. All splices in the system shall be made using solderless connectors and terminals.

2.16.1.2 Potential Equalization Subsystem

This subsystem shall provide potential equalization between the earth electrode subsystem and metallic components within the facility. Connect water pipes, heating and air conditioning pipes/ducts, bath and laundry equipment, etc., in accordance with C.E.I. and I.E.C. Requirements. Provide supplementary grounding bar at each bathroom as equipotential node in accordance with CEI 64-8.

2.17 Through the Wall Conduit and Cable Fire Barrier

Provide a factory assembly consisting of mounting frame and sealing blocks which will accommodate cable ranges listed on the drawings. Assembly shall be capable of providing a fire resistance equal to the wall in which the assembly is installed.

PART 3 - EXECUTION

3.1

INSTALLATION

3.1.1 General Requirements

Electrical installations shall conform to the requirements of CEI 64-8 and to the requirements specified herein.

3.1.2 Wiring Methods

Wiring method shall be insulated conductors, installed in conduit, except where specifically indicated or specified otherwise, or required by CEI to be installed otherwise. An insulated equipment grounding conductor shall be provided in all feeder and branch circuits, including lighting circuits. Provide insulated, green-yellow colored conductor for grounding conductors installed in conduit or raceways.

3.2 CONDUIT INSTALLATION

Conduit shall be concealed within finished walls, ceilings and floors or conduits may be run exposed in utility spaces. Except where otherwise specifically indicated, conduits run exposed and below 2.5 meters above finished floor and conduits run exposed in exterior locations shall be rigid steel; conduits run concealed or exposed above 2.5 meters above finished floor, shall be metal tubing or PVC tubing. PVC covered flexible metal conduits shall be used for connections to motors and other equipment subject to vibration. Conduits run exposed in the attic space shall be metal tubing.

3.3

CONDUIT INSTALLATION GENERAL REQUIREMENTS

Conduit shall be installed concealed in walls, floors and ceilings. Conduit may be run exposed in equipment rooms and as indicated. Maintain a minimum distance of 150 millimeters from parallel runs of flues, or hot water pipes. Groups of conduit shall be uniformly spaced, where straight and at turns. Bends and offsets, where unavoidable, shall be made with a bending machine. A run of conduit between outlets shall not contain more than the equivalent of four quarter bends (360 degrees total) including the bends located immediately at the outlet. Conduit shall be cut with a hacksaw or an approved conduit-cutting machine and reamed after threading to remove all burrs. Securely fasten conduit to outlets, junction and pull boxes to effect firm electrical and mechanical connections. Join conduit with approved couplings. Trapped conduits shall be avoided. Plaster, dirt or trash shall be prevented from lodging in conduits, boxes, fittings and equipment during construction. Clogged conduits shall be freed of all obstructions. Empty conduits shall have pull wires installed. The pull wire shall be 2.5 square millimeters zinc-coated steel or of plastic having not less than 14 kilograms/square centimeter tensile strength. Not less than 300 millimeters of slack shall be left at each end of the pull wire.

3.3.1 Moisture pockets shall be eliminated from conduits. If water cannot drain to the natural opening in the conduit system, a hole shall be drilled in the bottom of a pull box provided at the low point of the conduit run.

3.3.1.1 Metal conduit shall be joined by threaded conduit couplings for rigid steel or compression type coupling for metallic tubing.

3.3.1.2 Bends in conduit shall be made without reducing the internal diameter of the conduit. The use of a pipe tee or vise for bending conduit will not be permitted. The inside radius of conduit bends shall be not less than six times the inside diameter of the conduit. Conduits deformed or crushed in any way shall not be used.

3.3.1.3 The plane of all conduit ends shall be square with the center line. Where threads are required, they shall be cut and cleaned prior to conduit reaming. The ends of all conduit shall be reamed to remove all rough edges and burrs. A cutting lubricant shall be used in threading operations, the dies shall be kept sharp, and provisions shall be made for chip clearance. Where practicable all threads shall be half the length of the appropriate standard coupling. Exposed threads shall be immediately painted to prevent rust. The Contractor shall supply this protective material and shall apply it in the field.

3.3.1.4 A pull wire shall be inserted in each empty conduit in which wiring is to be installed by others if the conduit is more than 15 m in length and contains more than the equivalent of two 90 degree bends or where the conduit is more than 45 m in length. The pull wire shall be plastic having no less than 90 kg tensile strength. Not less than 25 cm of slack shall be left at each end of the pull wire.

3.3.1.5 Exposed rigid steel conduit shall be utilized for all installations in utility rooms, mechanical equipment rooms or whenever subject to mechanical damage or as noted.

3.3.1.6 Telephone Conduits

Communication cable conduits shall be installed in accordance with the previous requirements for conduit installations.

3.3.1.7 Stub-Ups

Provide conduits stubbed up through concrete floor for connection to free-standing equipment (i.e. switchboards) with an adjustable top or coupling threaded inside for plugs, set flush with the finished floor. As an option to this requirement, the Contractor may provide a concrete cable pit below freestanding equipment for cable connections.

3.3.2 Flexible Conduit

3.3.2.1 Flexible conduit shall be installed adjacent to the motor terminal housing for motors requiring 100 mm and smaller conduit.

3.3.3 Plastic Conduit

3.3.3.1 Except as specified in the following paragraphs, polyvinyl chloride conduit shall be installed in accordance with the installation requirements previously specified for rigid steel conduit. Expansion joints for exposed conduit or buried conduit which will be exposed to temperature variations during installation shall be provided as recommended by the manufacturer.

3.3.3.2 Joints shall be unthreaded solvent cement type as recommended by the conduit manufacturer. The contact surfaces of the conduit and fitting socket shall be cleaned with solvent, methyl ethyl ketone, or acetone, liberally coated with solvent cement, promptly and fully engaged, and either conduit or fitting rotated approximately 1/4 turn to dispel air and evenly distribute solvent cement over contact surfaces.

3.3.3.3 Bends shall be made from straight conduit lengths or shall be factory fabricated.

3.3.3.4 The conduit length for field bending shall be heated to approximately 135 deg C by radiant heat, hot air, or hot liquid immersion. Open flame heating will not be permitted. Special mandrels or forms shall be used to provide a smooth bend without reduction of the conduit diameter. Conduit discolored by prolonged heating will not be acceptable.

3.3.4 Boxes, Outlets, and Supports

Provide boxes in the wiring or raceway systems wherever required for pulling of wires, making connections, and mounting of devices or fixtures. Boxes for metallic raceways shall be of the cast-metal hub type when located in normally wet locations, when surface mounted on outside of exterior surfaces and when installed exposed up to 2.5 m above interior floors and walkways. Boxes in other locations shall be sheet steel, and non-metallic boxes may be used with non-metallic conduit system. Each box shall have the volume required for the number of conductors enclosed in the box. Boxes for mounting lighting fixtures shall be not less than 60 mm square or octagonal, except that smaller boxes may be installed as required by fixture configurations, as approved. Boxes for use in masonry-block or tile walls shall be square-cornered tile-type, or standard boxes having square-cornered tile-type covers. Provide gaskets for cast-metal boxes installed in wet locations and boxes installed flush with the outside of exterior surfaces. Provide separate boxes for flush or recessed fixtures when required by the fixture terminal operating temperature; fixtures shall be readily removable for access to the boxes unless ceiling access panels are provided. Support boxes and pendants for surface-mounted fixtures on suspended ceilings independently of the ceiling supports or make adequate provisions for distributing the load over the ceiling support members in an approved manner. Fasten boxes and supports with wood screws on wood, with bolts and expansion shields on concrete or brick, with toggle bolts on hollow masonry units, and with machine screws or welded studs on steel work. Threaded studs driven in by powder charge and provided with lockwashers and nuts or nail-type nylon anchors may be used in lieu of wood screws, expansion shields, or machine screws. In open overhead spaces, cast boxes threaded to raceways need not be separately supported except where used for fixture support; support sheet metal boxes directly from the building structure or by bar hangers. Where bar hangers are used, attach the bar to raceways on opposite sides of the box and support the raceway with an approved type fastener not more than 60 cm from the box. When penetrating reinforced-concrete members, avoid cutting any reinforcing steel.

3.3.4.1 Boxes for use with raceway systems shall not be less than 40 mm deep, except where shallower boxes required by structural conditions are approved. Boxes for other than lighting fixture outlets shall be not less than 10 cm square, except that 10 cm by 5 cm boxes may be used where only one raceway enters the outlet.

3.3.4.2 Pull Boxes

Construct of galvanized sheet steel, except where cast-metal boxes are required in locations specified above. Furnish boxes with screw-fastened covers. Where several feeders pass through a common pull box, tag the feeders to indicate clearly the electrical characteristics, circuit number, and panel designation.

3.3.4.3 Mounting Heights

Mount panelboard, circuit breakers, and disconnecting switches so the height of the operating handle at its highest position will not exceed 2 m from the floor. Mount lighting switches, receptacles, and other devices as indicated. Measure mounting heights of wiring devices and outlets to the center of device or outlet.

3.3.5 Conductor Identification

Provide conductor identification within each enclosure where a tap, splice, or termination is made. For conductors 16 sq. mm and smaller, color coding shall be factory-applied color-impregnated insulation. For conductors 25 sq. mm and larger, color coding shall be by plastic-coated, self-sticking markers, colored nylon cable ties and plates, or heat-shrink type sleeves. Identify control circuit terminations.

3.3.6 Electrical Penetrations

Openings around electrical penetrations through fire resistance rated walls, partitions, floors or ceilings shall be sealed to maintain the fire resistivity rating of the wall, partition, floor or ceiling using a through the wall cable/conduit fire barrier.

3.3.7 Splices

Make splices in accessible locations. Make splices in conductors 4 sq. mm and smaller with a insulated pressure type connector. Make splices in conductors 6 sq. mm and larger with a solderless connector and cover with an insulation material equivalent to the conductor insulation. It is forbidden make splices inside conduit or inside cable tray.

3.3.8 Covers and Device Plates

Install with all four edges in continuous contact with finished wall surfaces without the use of mats or similar devices. Plaster fillings will not be permitted. Plates shall be installed with an alignment tolerance of 1.5 mm. The use of sectional type device plates will not be permitted. Plates installed in wet locations shall be gasketed.

3.3.9 Telephone and Data Communications System Installation

Telecommunications cabling and pathway systems, including the horizontal and backbone cable, pathway systems, telecommunications outlets, work area outlets, and associated hardware shall be installed in accordance with EIA/TIA-568 and EIA/TIA-569. Cabling shall be connected in a star topology network.

3.3.9.1 Cabling Installation

Install Category 5 for telephone and data system telecommunications cabling and pathway system using UTP, detailed in EIA/TIA-568. Screw terminals shall not be used for Category 5 UTP cable terminations. Use an approved insulated displacement connection (IDC) tool kit for all cable terminations. Provide service loop on each end of the cable (1 meter) for future cables. Provide a device to monitor cable pull tensions. Do not exceed 11.4 kilograms pull tension for 4 pair copper cables. Do not chafe or damage outer jacket materials. Use only lubricants approved by the cable manufacturer.

3.3.9.2 Pathway Installations

Shall comply with EIA/TIA-569. Install no more than two 90 degree bends for a single horizontal cable run.

3.3.9.3 Cable Installations

Shall comply with EIA/TIA-568. Cable shall be installed in either conduit or cable tray and not without support.

3.3.9.4 Cable Tray Installation

Install cable tray components in accordance with EIA/TIA-569.

3.3.9.5 Outlets

Terminate UTP cable in accordance with EIA/TIA-568, wiring configuration.

3.3.9.6 Termination

Install termination hardware required for Category 5 system. An insulation displacement tool must be used for terminating Class 5 systems.

3.3.10 Grounding and Bonding

3.3.10.1 General

A complete grounding system shall be provided as shown on the drawings and described in the specification. Install grounding equipment in accordance with manufacturers instructions.

3.3.10.2 Equipment Ground (equipment fault protection subsystem)

The equipment ground system shall be designed so all exposed non current carrying metallic parts of electrical equipment, metallic raceways, junction boxes, outlet boxes, cabinets, machine frames, portable equipment and other conductive items in close proximity with electrical circuits shall be grounded.

The ground bus in the main switchboard shall be connected to the earth electrode subsystem ground as shown on the drawings.

b.

Grounding Conductor: A green/yellow stranded copper ground conductor shall be provided in all feeder and branch circuits from panels. This conductor shall be separate from the electrical system neutral conductor.

c.

Joints in raceways and flexible connections in conduit shall be bridged by a bonding conductor.

d.

Provide a Combined Protective Earth and Neutral Conductor (PEN) between the mid point of the main transformer and secondary switchgear in the electrical utility building. Provide separate PE and N conductors thereafter, down line. (TN-S System.)

3.3.10.3 Grounding connections which are buried or otherwise normally inaccessible, and excepting specifically those connections for which access for periodic testing is required, shall be made by exothermic weld. Exothermic welds shall be made strictly in accordance with the weld manufacturer's written recommendations. Welds which are "puffed up" or which show convex surfaces, indicating improper cleaning, are not acceptable. Coat underground welds with a moisture resistant material. Similarly treat under and above ground copper to steel connections.

3.3.11 Equipment Connections

Provide power wiring for the connection of motors and control equipment under this section of the specification. Except as otherwise specifically noted or specified, automatic control wiring, control devices, and protective devices within the control circuitry are not included in this section of the specifications, but shall be provided under the section specifying the associated equipment.

3.4

FIELD TESTS

3.4.1 Grounding System Test

Test the grounding system to ensure continuity and that the resistance to ground is not excessive.

3.4.2 Transformer Tests

Perform the following tests:

3.4.2.1 Insulation resistance.

3.4.2.2 Polarity and phase relationships.

3.4.2.3 Voltage

Test transformer secondary voltage and adjust the voltage at the transformer secondary to provide the voltage specified on the drawings.

3.4.3 Telecommunications Cabling Field Testing, System Certification, Validation, and Testing

3.4.3.1 Certification

Visually inspect cabling jacket materials for UL or other certification markings. Inspect cabling terminations in telecommunications rooms and at workstations to confirm color tip (+), ring (-), pin assignments, and wiring connections to confirm compliance with EIA/TIA-568. Visually confirm Category 5 marking of outlets and patch panels.

3.4.3.2 Validation

The results of each test described in the following paragraphs shall be recorded for each cable pair. If any shorts, grounds, or miswiring are detected the deficiency shall be corrected or the cable replaced as appropriate. For attenuation and near end crosstalk the acceptable valve shall be as specified in EIA/TIA TSB-36, for the cables and EIA/TIA TSB-40, for termination hardware.

UTP backbone copper cabling shall be tested for DC loop resistance, shorts between conductors, and grounds. Test operation of shorting bars in connector blocks. Test cables after termination but not cross connected.

Horizontal UTP prior to trim out test each pair for continuity, short to ground, crosses, and reverse polarity. Perform 100 MHZ tone test for Category 5 installations. For data cables, attenuation and near end crosstalk readings shall be measured and recorded.

3.4.3.3 Final Verification Tests

Verification tests UTP, systems. Perform the following tests after the complete telecommunications cabling and outlets are installed. This test assumes that dial tone service has been installed. Connect to the network interface device at the demarcation point. Go off-hook and listen/receive a dial tone. If a test is available make and receive a local telephone call.

3.4.4 Cable Administration

Each telecommunication cable pair shall be cataloged in accordance with EIA/TIA-606, and labeled at each termination with the resulting designation.

-- End of Section --

Section 16402

Section 16402