26 20 00-INTERIOR DISTRIBUTION SYSTEM-REVISION 03_AMENDMENT 5.pdf

SECTION 26 20 00 Page 1

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

08/08

PART 1 GENERAL

SECTION 26 20 00 Page 2

1.1 REFERENCES

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.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C12.7 (2005) Requirements for Watthour Meter

Sockets

ASTM INTERNATIONAL (ASTM)

ASTM B 1 (2001; R 2007) Standard Specification for

Hard-Drawn Copper Wire

ASTM B 8 (2004) Standard Specification for Concentric-

Lay-Stranded Copper Conductors, Hard, Medium- Hard, or Soft

ASTM D 709 (2001; R 2007) Laminated Thermosetting

Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2007; Errata 2007; INT 2008) National

Electrical Safety Code

IEEE Std 100 (2000) The Authoritative Dictionary of IEEE

Standards Terms

IEEE Std 81 (1983) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System (Part 1)Normal Measurements

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2003) Acceptance Testing Specifications

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2003) Enclosures for Electrical Equipment

(1000 Volts Maximum)

NEMA BU 1.1 (2005) General Instructions for Proper

Handling, Installation, Operation, and Maintenance of Busway Rated 600 Volts or Less

NEMA C12.1 (2008) Electric Meters; Code for Electricity

Metering

NEMA C80.1 (2005) Standard for Electrical Rigid Steel

Conduit (ERSC)

NEMA C80.3 (2005) Standard for Electrical Metallic

Tubing (EMT)

SECTION 26 20 00 Page 3

NEMA C80.5 (2005) Standard for Electrical Rigid Aluminum

Conduit (ERAC)

NEMA FU 1 (2002; R 2007) Low Voltage Cartridge Fuses

NEMA ICS 1 (2000; R 2005; R 2008) Standard for

Industrial Control and Systems General Requirements

NEMA ICS 2 (2000; Errata 2002; R 2005; Errata 2006)

Standard for Industrial Control and Systems:

Controllers, Contractors, and Overload Relays Rated Not More than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control Equipment

NEMA ICS 3 (2005) Standard for Industrial Control and

Systems: Medium Voltage Controllers Rated 2001 to 7200 Volts AC

NEMA ICS 4 (2005) Industrial Control and Systems:

Terminal Blocks

NEMA ICS 6 (1993; R 2006) Standard for Industrial

Controls and Systems Enclosures

NEMA KS 1 (2001; R 2006) Enclosed and Miscellaneous

Distribution Equipment Switches (600 Volts Maximum)

NEMA MG 1 (2007; Errata 2008) Standard for Motors and

Generators

NEMA MG 10 (2001; R 2007) Energy Management Guide for

Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

NEMA MG 11 (1977; R 2007) Energy Management Guide for

Selection and Use of Single Phase Motors

NEMA RN 1 (2005) Standard for Polyvinyl Chloride (PVC)

Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit

NEMA ST 20 (1992; R 1997) Standard for Dry-Type

Transformers for General Applications

NEMA TC 14 (2002) Standard for Reinforced Thermosetting

Resin Conduit (RTRC) and Fittings

NEMA TC 2 (2003) Standard for Electrical Polyvinyl

Chloride (PVC) Tubing and Conduit

NEMA TC 3 (2004) Standard for Polyvinyl Chloride PVC

Fittings for Use With Rigid PVC Conduit and Tubing

SECTION 26 20 00 Page 4

NEMA TP 1 (2002) Guide for Determining Energy

Efficiency for Distribution Transformers

NEMA VE 1 (2002) Standard for Metallic Cable Tray

Systems

NEMA WD 1 (1999; R 2005) Standard for General

Requirements for Wiring Devices

NEMA WD 6 (2002; R 2008) Standard for Wiring Devices -

Dimensional Requirements

NEMA Z535.4 (2007; Errata 2007) Product Safety Signs and

Labels

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2007; AMD 1 2008) National Electrical Code -

2008 Edition

NFPA 70E (2008) Electrical Safety in the Workplace

NFPA 780 (2007) Standard for the Installation of

Lightning Protection Systems

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

TIA J-STD-607-A (2002) Commercial Building Grounding

(Earthing) and Bonding Requirements for Telecommunications

TIA/EIA-568-B.1 (2001 Addendums 2001, 2003, 2003, 2003, 2004, 2007) Commercial Building Telecommunications Cabling Standard - Part 1: General Requirements

TIA/EIA-569-A (1998; Addenda 2000, 2001) Commercial

Building Standards for Telecommunications Pathways and Spaces

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910.147 Control of Hazardous Energy (Lock Out/Tag

Out)

UNDERWRITERS LABORATORIES (UL)

UL 1 (2005; Rev thru Jul 2007) Standard for

Flexible Metal Conduit

UL 1010 (2006) Receptacle-Plug Combinations for Use in Hazardous (Classified) Locations

UL 1063 (2006) Standard for Safety Machine-Tools

Wires and Cables

SECTION 26 20 00 Page 5

UL 1242 (2006; Rev thru Jul 2007) Standard for Electrical Intermediate Metal Conduit -- Steel

UL 1449 (2006) Surge Protective Devices

UL 1561 (1999; Rev thru Sep 2005) Dry-Type General

Purpose and Power Transformers

UL 1569 (1999; Rev thru Nov 2006) Metal-Clad Cables

UL 1699 (1999; Rev thru May 2003) Arc-Fault Circuit-

Interrupters

UL 198M (2003; Rev thru Oct 2007) Mine-Duty Fuses

UL 20 (2000 ; Rev thru Dec 2004) Standard for

General-Use Snap Switches

UL 2043 (2008) Fire Test for Heat and Visible Smoke

Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces

UL 360 (2003; Rev thru Jul 2007) Liquid-Tight

Flexible Steel Conduit

UL 4 (2004) Armored Cable

UL 44 (2005; Rev thru Nov 2005) Thermoset-Insulated

Wires and Cables

UL 467 (2007) Standard for Grounding and Bonding

Equipment

UL 486A-486B (2003; Rev thru Aug 2006) Standard for Wire

Connectors

UL 486C (2004; Rev thru Aug 2006) Standard for

Splicing Wire Connectors

UL 489 (2002; Rev thru Jun 2006) Standard for

Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 498 (2001; Rev thru Nov 2007) Attachment Plugs and Receptacles

UL 5 (2004; Rev thru May 2007) Surface Metal

Raceways and Fittings

UL 50 (2007) Standard for Enclosures for Electrical

Equipment

UL 506 (2000; Rev thru May 2006) Standard for

Specialty Transformers

SECTION 26 20 00 Page 6

UL 508 (1999; Rev thru Sep 2008) Standard for Industrial Control Equipment

UL 510 (2005; Rev thru Aug 2005) Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape

UL 512 (1993; Rev thru Jan 2008) Fuseholders

UL 514A (2004; Rev thru Aug 2007) Standard for

Metallic Outlet Boxes

UL 514B (2004; Rev thru Aug 2007) Standard for

Conduit, Tubing and Cable Fittings

UL 514C (1996; Rev thru Jul 2008) Nonmetallic Outlet

Boxes, Flush-Device Boxes, and Covers

UL 5A (2003; Rev thru Aug 2008) Nonmetallic Surface

Raceways and Fittings

UL 6 (2007) Standard for Electrical Rigid Metal

Conduit-Steel

UL 651 (2005; Rev thru May 2007) Standard for

Schedule 40 and 80 Rigid PVC Conduit and Fittings

UL 67 (1993; Rev thru Jul 2008) Standard for

Panelboards

UL 674 (2003; Rev thru Oct 2007) Standard for

Electric Motors and Generators for Use in Division 1 Hazardous (Classified) Locations

UL 698 (2006) Industrial Control Equipment for

Hazardous (Classified) Locations

UL 6A (2000; Rev thru Jan 2004) Electrical Rigid

Metal Conduit - Aluminum, Red Brass, and Stainless Steel

UL 719 (2006; Rev thru Oct 2007) Nonmetallic-

Sheathed Cables

UL 797 (2007) Standard for Electrical Metallic

Tubing -- Steel

UL 817 (2001; Rev thru May 2007) Cord Sets and

Power-Supply Cords

UL 83 (20086) Standard for Thermoplastic-Insulated

Wires and Cables

UL 845 (2005; Rev thru Aug 2006) Standard for Motor

Control Centers

SECTION 26 20 00 Page 7

UL 854 (2004; Rev thru Oct 2007) Service-Entrance Cables

UL 857 (2001; Rev thru Nov 2002) Busways

UL 869A (2006) Reference Standard for Service

Equipment

UL 870 (1995; Rev thru Jul 2003) Standard for

Wireways, Auxiliary Gutters, and Associated Fittings

UL 877 (1993; Rev thru Nov 1999) Circuit Breakers and Circuit-Breaker Enclosures for Use in Hazardous (Classified) Locations

UL 886 (1994; Rev thru Nov 2005) Outlet Boxes and

Fittings for Use in Hazardous (Classified) Locations

UL 943 (2006; Rev thru Feb 2008) Ground-Fault

Circuit-Interrupters

UL 984 (1996; Rev thru Sept 2005) Hermetic

Refrigerant Motor-Compressors

1.2 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, shall be as defined in IEEE Std 100.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Panelboards; G

Transformers; G

Busway; G

Cable trays; G

Motor control centers; G

Include wiring diagrams and installation details of equipment indicating proposed location, layout and arrangement, control panels, accessories, piping, ductwork, and other items that must be shown to ensure a coordinated installation. Include diagrams and schematics or elementary diagrams of each electrical system;

SECTION 26 20 00 Page 8 internal wiring and field connection diagrams of each electrical device when published by the manufacturer; wiring diagrams of cabinets, panels, units, or separate mountings; interconnection diagrams that show the wiring between separate components of assemblies; field connection diagrams that show the termination of wiring routed between separate items of equipment; internal wiring diagrams of equipment showing wiring as actually provided for this project. Field wiring connections shall be clearly identified.

Detail drawings shall consist of equipment drawings, illustrations, schedules, instructions, diagrams, and other information necessary to define the installation. Detail drawings shall show the rating of items and systems and how the components of an item and system are assembled, function together, and how they will be installed on the project. Data and drawings for component parts of an item or system shall be coordinated and submitted as a unit. Data and drawings shall be coordinated and included in a single submission.

Multiple submissions for the same equipment or system are not acceptable except where prior approval has been obtained from the Contracting Officer. In such cases, a list of data to be submitted later shall be included with the first submission. Detail drawings shall show physical arrangement, construction details, connections, finishes, materials used in fabrication, provisions for conduit or busway entrance, access requirements for installation and maintenance, physical size, electrical characteristics, foundation and support details, and equipment weight. Drawings shall be drawn to scale and/or dimensioned. Optional items shall be clearly identified as included or excluded. If departures from the contract drawings are deemed necessary by the Contractor, complete details of such departures, including changes in related portions of the project and the reasons why, shall be submitted with the detail drawings. Approved departures shall be made at no additional cost to the Government

Wireways; G

Marking strips drawings; G

SD-03 Product Data

Steel or PVC Conduit; G

Submit manufacturer documentation indicating type of recovered materials and the percentage of such material that is (1) recovered and (2) postconsumer recycled content. Alternately, submit written justification of non-use per Section 01 62 35 RECYCLED / RECOVERED

MATERIALS.

Receptacles; G

Circuit breakers; G

Switches; G

Transformers; G

Enclosed circuit breakers; G

SECTION 26 20 00 Page 9

Polyphase Squirrel-cage Medium Induction Motors; G

Submit Manufacturer documentation demonstrating that the motor meets the premium efficiency rating requirements in accordance with

NEMA MG-1.

Motor controllers; G

Combination motor controllers; G

Manual motor starters; G

Metering; G

CATV outlets; G

Telecommunications Grounding Busbar; G

Surge protective devices; G

Submittals shall include performance and characteristic curves, and data composed of catalog cuts, brochures, circulars, specifications, product data, and printed information in sufficient detail and scope to verify compliance with the requirements of the contract documents. Provide a complete itemized listing of equipment and materials proposed for incorporation into the work.

Each entry shall include an item number, the quantity of items proposed, and the name of the manufacturer of each item.

SD-06 Test Reports

600-volt wiring test; G

Grounding system test; G

Transformer tests; G

Ground-fault receptacle test; G

SD-07 Certificates

Fuses; G

SD-09 Manufacturer's Field Reports

Transformer factory tests; G

SD-10 Operation and Maintenance Data

Electrical Systems, Data Package 5; G

Metering, Data Package 5; G

Submit operation and maintenance data in accordance with Section 01 78 23, OPERATION AND MAINTENANCE DATA and as specified herein.

Procedures shall include diagrams, instructions, and precautions

SECTION 26 20 00 Page 10 required to install, adjust, calibrate, and test devices and equipment.

SD-11 Closeout Submittals

Record Documentation; G

In addition to other requirements, provide in accordance with paragraph RECORD DOCUMENTATION.

1.4 QUALITY ASSURANCE

1.4.1 Fuses

Submit coordination data as specified in paragraph, FUSES of this section.

1.4.2 Regulatory Requirements

In each of the publications referred to herein, consider the advisory provisions to be mandatory, as though the word, "shall" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean the Contracting Officer. Equipment, materials, installation, and workmanship shall be in accordance with the mandatory and advisory provisions of NFPA 70 unless more stringent requirements are specified or indicated.

1.4.3 Standard Products

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship. Products shall have been in satisfactory commercial or industrial use for 2 years prior to bid opening. The 2-year period shall include applications of equipment and materials under similar circumstances and of similar size. The product shall have been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period. Where two or more items of the same class of equipment are required, these items shall be products of a single manufacturer;

however, the component parts of the item need not be the products of the same manufacturer unless stated in this section.

1.4.3.1 Alternative Qualifications

Products having less than a 2-year field service record will be acceptable if a certified record of satisfactory field operation for not less than 6000 hours, exclusive of the manufacturers' factory or laboratory tests, is furnished.

1.4.3.2 Material and Equipment Manufacturing Date

Products manufactured more than 3 years prior to date of delivery to site shall not be used, unless specified otherwise.

1.5 MAINTENANCE

1.5.1 Record Documentation

SECTION 26 20 00 Page 11

Record Drawings shall be provided as a record of the construction as installed. The drawings shall include all the information shown on the contract drawings, deviations, modifications, and changes from the contract drawings, however minor. The as-built drawings shall be kept at the job site and updated daily. Drawings shall be in AUTOCAD (.dwg) format using the AUTOCAD 2008 or earlier. The as-built drawings shall be a full-sized set of prints marked to reflect all deviations, changes, and modifications.

The as-built drawings shall be complete and show the location, size, dimensions, part identification, and other information. Additional sheets may be added. The as-built drawings shall be jointly inspected for accuracy and completeness by the Contractor's quality control representative and by the Contracting Officer prior to the submission of each monthly pay estimate. Upon completion of the work, the Contractor shall submit three full sized sets of the marked prints to the Contracting Officer for approval. If upon review, the as-built drawings are found to contain errors and/or omissions, they will be returned to the Contractor for correction.

The Contractor shall correct and return the as-built drawings to the Contracting Officer for approval within ten calendar days from the time the drawings are returned to the Contractor

1.5.2 Electrical Systems

Submit two complete hard copies and one electronic copy in Adobe Acrobat (.pdf) format on CD or DVD of operation and maintenance manuals for electrical systems that provide basic data relating to the design, operation, and maintenance of the electrical distribution system for the building. This shall include:

a. Single line diagram of the "as-built" building electrical system.

b. Schematic diagram of electrical control system (other than HVAC, covered elsewhere).

c. Manufacturers' operating and maintenance manuals on active electrical equipment.

1.6 WARRANTY

The equipment items shall be supported by service organizations which are reasonably convenient to the equipment installation in order to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

1.7 SEISMIC REQUIREMENTS

Seismic details shall conform to Section 13 48 00, SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT and to Section 26 05 48.00 10, SEISMIC PROTECTION

FOR ELECTRICAL EQUIPMENT.

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

Materials, equipment, and devices shall, as a minimum, meet requirements of UL, where UL standards are established for those items, and requirements of

NFPA 70.

SECTION 26 20 00 Page 12

2.2 CONDUIT AND FITTINGS

Shall conform to the following:

2.2.1 Rigid Metallic Conduit

2.2.1.1 Rigid, Threaded Zinc-Coated Steel Conduit

NEMA C80.1, UL 6.

2.2.1.2 Rigid Aluminum Conduit

NEMA C80.5, UL 6A.

2.2.2 Rigid Nonmetallic Conduit

PVC Type EPC-40 and EPC-80 in accordance with NEMA TC 2,UL 651, or fiberglass conduit, in accordance with NEMA TC 14.

2.2.3 Intermediate Metal Conduit (IMC)

UL 1242, zinc-coated steel only.

2.2.4 Electrical, Zinc-Coated Steel Metallic Tubing (EMT)

UL 797, NEMA C80.3.

2.2.5 Plastic-Coated Rigid Steel and IMC Conduit

NEMA RN 1, Type 40(40 mils thick).

2.2.6 Flexible Metal Conduit

UL 1.

2.2.6.1 Liquid-Tight Flexible Metal Conduit, Steel

UL 360.

2.2.7 Fittings for Metal Conduit, EMT, and Flexible Metal Conduit

UL 514B. Ferrous fittings shall be cadmium- or zinc-coated in accordance with UL 514B.

2.2.7.1 Fittings for Rigid Metal Conduit and IMC

Threaded-type. Split couplings unacceptable.

2.2.7.2 Fittings for EMT

Steel or Die cast compression type.

2.2.8 Fittings for Rigid Nonmetallic Conduit

NEMA TC 3 for PVC, and UL 514B.

SECTION 26 20 00 Page 13

2.2.9 Steel or PVC Conduit

Steel and PVC conduit materials shall conform to EPA requirements in accordance with Section 01 62 35 RECYCLED / RECOVERED MATERIALS.

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

UL 5, two-piece painted steel, totally enclosed, snap-cover type. Provide multiple outlet-type raceway with grounding-type receptacle where indicated.

Receptacles shall be as specified herein and shall be spaced and wired as stated in the Delivery or Task Order.

2.3.2 Surface Nonmetallic Raceway

UL 5A, nonmetallic totally enclosed, snap-cover type. Provide multiple outlet-type raceway with grounding-type receptacle where indicated.

Receptacles shall be as specified herein and shall be spaced and wired as stated in the Delivery or Task Order.

2.4 BUSWAY

NEMA BU 1.1, UL 857. Buses shall be copper, with ratings as stated in the Delivery or Task Order, and shall include integral or internal ground bus.

Short circuit rating shall be root mean square (rms) symmetrical amperes minimum as indicated. Busway systems shall be suitable for the installed environment. Enclosures shall be steel. Hardware shall be plated or otherwise protected to resist corrosion. Joints shall be one-bolt type with through-bolts, which can be checked for tightness without de-energizing system. Maximum hot spot temperature rise at any point in busway at continuous rated load shall not exceed 55 degrees C above maximum ambient temperature of 40 degrees C in any position. Provide internal barriers to prevent movement of superheated gases. Contractor shall coordinate proper voltage phasing of entire bus duct system, for example where busway interfaces with transformers, switchgear, switchboards, motor control centers, and other system components.

2.4.1 Feeder Busways

Provide ventilated, except that vertical busways within 6 feet of floors shall be unventilated, low-impedance busway. Bus bars shall be fully covered with insulating material, except at stabs. Entire busway system shall be polarized.

2.4.2 Plug-In Busways

Unventilated type. Plug-in units shall be circuit breaker-type or handle-operated, switch type, equipped with high interrupting-capacity, current-limiting fuses as stated in the Delivery or Task Order. Bus bars shall be covered with insulating material throughout, except at joints and other connection points. A hook stick of suitable length shall be provided for operating plug-in units from the floor.

2.5 CABLE TRAYS

SECTION 26 20 00 Page 14

NEMA VE 1. Cable trays shall form a wireway system, and shall be of nominal depth as indicated. 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. Edges, fittings, and hardware shall be finished free from burrs and sharp edges. Fittings shall have not less than load-carrying ability of straight tray sections and shall have manufacturer's minimum standard radius. Radius of bends shall be as indicated.

2.5.1 Trough-Type Cable Trays

Provide width as stated in the Delivery or Task Order.

2.5.2 Ladder-Type Cable Trays

Provide with width and rung spacing as stated in the Delivery or Task Order.

2.5.3 Channel-Type Cable Trays

Provide with width as stated in the Delivery or Task Order. Trays shall be one-piece construction having slots spaced not more than 4 1/2 inches on centers.

2.5.4 Cantilever

Cantilever-type, center-hung cable trays may be provided at the Contractor's option in lieu of other cable tray types specified.

2.6 OPEN TELECOMMUNICATIONS CABLE SUPPORT

2.6.1 Open Top Cable Supports

Provide open top cable supports in accordance with UL 2043. Open top cable supports shall be as indicated.

2.6.2 Closed Ring Cable Supports

Provide closed ring cable supports in accordance with UL 2043. Closed ring cable supports shall be as indicated.

2.7 OUTLET BOXES AND COVERS

UL 514A, cadmium- or zinc-coated, if ferrous metal. UL 514C, if nonmetallic.

2.7.1 Floor Outlet Boxes

Boxes shall be adjustable and concrete tight. Each outlet shall consist of nonmetallic or cast-metal body with threaded openings for conduits, adjustable ring, and cover plate with threaded plug as stated in the Delivery or Task Order. Telecommunications outlets shall be as stated in the Delivery or Task Order. Receptacle outlets shall be as stated in the Delivery or Task Order and as specified herein. Provide gaskets where necessary to ensure watertight installation.

2.7.2 Outlet Boxes for Telecommunications System

SECTION 26 20 00 Page 15

Provide standard type 4 11/16 inches square. Outlet boxes for wall-mounted telecommunications outlets shall be 4 by 2 1/8. Depth of boxes shall be large enough to allow manufacturers' recommended conductor bend radii.

2.8 CABINETS, JUNCTION BOXES, AND PULL BOXES

Volume greater than 100 cubic inches, UL 50, hot-dip, zinc-coated, if sheet steel.

2.9 WIRES AND CABLES

Wires and cables shall meet applicable requirements of NFPA 70 and UL for type of insulation, jacket, and conductor specified or indicated. Wires and cables manufactured more than 12 months prior to date of delivery to site shall not be used.

2.9.1 Conductors

Conductors No. 8 AWG and larger diameter shall be stranded. Conductors No.

10 AWG and smaller diameter shall be solid, except that conductors for remote control, alarm, and signal circuits, classes 1, 2, and 3, shall be stranded unless specifically indicated otherwise. Conductor sizes and capacities shown are based on copper, unless indicated otherwise. All conductors shall be copper.

2.9.1.1 Aluminum Conductors

Aluminum conductors shall not be used.

2.9.1.2 Minimum Conductor Sizes

Minimum size for branch circuits shall be No. 12 AWG; for Class 1 remote-control and signal circuits, No. 14 AWG; for Class 2 low-energy, remote-control and signal circuits, No. 16 AWG; and for Class 3 low-energy, remote-control, alarm and signal circuits, No. 22 AWG.

2.9.2 Color Coding

Provide for service, feeder, branch, control, and signaling circuit conductors. Color shall be green for grounding conductors and white for neutrals; except where neutrals of more than one system are installed in same raceway or box, other neutrals shall be white with a different colored (not green) stripe for each. Color of ungrounded conductors in different voltage systems shall be as follows:

a. 208/120 volt, three-phase

(1) Phase A - black

(2) Phase B - red

(3) Phase C - blue

b. 480/277 volt, three-phase

(1) Phase A - brown

SECTION 26 20 00 Page 16

(2) Phase B - orange

(3) Phase C - yellow

c. 120/240 volt, single phase: Black and red

2.9.3 Insulation

Unless specified or indicated otherwise or required by NFPA 70, power and lighting wires shall be 600-volt, Type THWN/THHN conforming to UL 83 or Type RHW conforming to UL 44, except that grounding wire may be type TW conforming to UL 83; remote-control and signal circuits shall be Type TW or TF, conforming to UL 83. Where lighting fixtures require 90-degree Centigrade (C) conductors, provide only conductors with 90-degree C insulation or better.

2.9.4 Bonding Conductors

ASTM B 1, solid bare copper wire for sizes No. 8 AWG and smaller diameter;

ASTM B 8, Class B, stranded bare copper wire for sizes No. 6 AWG and larger diameter.

2.9.4.1 Telecommunications Bonding Backbone (TBB)

Provide a copper conductor TBB in accordance with TIA J-STD-607-A. The TBB shall be a minimum No. 6 AWG and be sized at 2 kcmil per linear foot of conductor length up to a maximum size of 3/0 AWG.

2.9.4.2 Bonding Conductor for Telecommunications

Provide a copper conductor Bonding Conductor for Telecommunications between the telecommunications main grounding busbar (TMGB) and the electrical service ground in accordance with TIA J-STD-607-A. The bonding conductor for telecommunications shall be sized the same as the TBB.

2.9.5 Service Entrance Cables

Service Entrance (SE) and Underground Service Entrance (USE) Cables, UL 854.

2.9.6 Nonmetallic Sheathed Cable

UL 719, Type NM or NMC.

2.9.7 Wire and Cable for 400 Hertz (Hz) Circuits

Insulated copper conductors.

2.9.8 Metal-Clad Cable

UL 1569; NFPA 70, Type MC cable.

2.9.9 Armored Cable

UL 4; NFPA 70, Type AC cable.

2.9.10 Mineral-Insulated, Metal-Sheathed Cable

SECTION 26 20 00 Page 17

UL listed; NFPA 70, Type MI cable. Sheathing containing asbestos fibers shall not be used.

2.9.11 Flat Conductor Cable

UL listed; NFPA 70, Type FCC.

2.9.12 Cable Tray Cable or Power Limited Tray Cable

UL listed; type TC or PLTC.

2.9.13 Cord Sets and Power-Supply Cords

UL 817.

2.10 SPLICES AND TERMINATION COMPONENTS

UL 486A-486B for wire connectors and UL 510 for insulating tapes.

Connectors for No. 10 AWG and smaller diameter wires shall be insulated, pressure-type in accordance with UL 486A-486B or UL 486C (twist-on splicing connector). Provide solderless terminal lugs on stranded conductors.

2.11 DEVICE PLATES

Provide UL listed, one-piece device plates for outlets to suit the devices installed. For metal outlet boxes, plates on unfinished walls shall be of zinc-coated sheet steel or cast metal having round or beveled edges. For nonmetallic boxes and fittings, other suitable plates may be provided.

Plates on finished walls shall be nylon or lexan, minimum 0.03 inch wall thickness. Plates shall be same color as receptacle or toggle switch with which they are mounted. Plates on finished walls shall be satin finish stainless steel or brushed-finish aluminum, minimum 0.03 inch thick. Screws shall be machine-type with countersunk heads in color to match finish of plate. Sectional type device plates will not be permitted. Plates installed in wet locations shall be gasketed and UL listed for "wet locations."

2.12 SWITCHES

2.12.1 Toggle Switches

NEMA WD 1, UL 20,type as stated in the Delivery or Task Order, totally enclosed with bodies of thermoplastic or thermoset plastic and mounting strap with grounding screw. Handles shall be thermoplastic, color as stated in the Delivery or Task Order. Wiring terminals shall be screw-type, side-wired or of the solderless pressure type having suitable conductor-release arrangement. Contacts shall be silver-cadmium and contact arm shall be one-piece copper alloy. Switches shall be rated quiet-type ac only, 120/277 volts, with current rating and number of poles indicated.

2.12.2 Switch with Red Pilot Handle

NEMA WD 1. Provide pilot lights that are integrally constructed as a part of the switch's handle. The pilot light shall be red and shall illuminate whenever the switch is closed or "on". The pilot lighted switch shall be rated 20 amps and 120 volts or 277 volts as indicated. Provide the circuit's neutral conductor to each switch with a pilot light.

SECTION 26 20 00 Page 18

2.12.3 Breakers Used as Switches

For 120- and 277-Volt fluorescent fixtures, mark breakers "SWD" in accordance with UL 489.

2.12.4 Disconnect Switches

NEMA KS 1. Provide heavy duty-type switches where indicated, where switches are rated higher than 240 volts, and for double-throw switches. Fused switches shall utilize Class R fuseholders and fuses, unless indicated otherwise. Switches serving as motor-disconnect means shall be horsepower rated. Provide switches in NEMA 1 or 3R enclosure as indicated, per NEMA

ICS 6.

2.13 FUSES

NEMA FU 1. Provide complete set of fuses for each fusible switch, panel and control center. 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 voltage rating not less than circuit voltage.

2.13.1 Fuseholders

Provide in accordance with UL 512.

2.13.2 Cartridge Fuses, Current Limiting Type (Class R)

UL 198M, Class RK-1, RK-5, time-delay type as indicated. Associated fuseholders shall be Class R only.

2.13.3 Cartridge Fuses, High-Interrupting Capacity, Current Limiting Type (Classes J, L, and CC)

UL 198M, Class J for zero to 600 amperes, Class L for 601 to 6,000 amperes, and Class CC for zero to 30 amperes.

2.13.4 Cartridge Fuses, Current Limiting Type (Class T)

UL 198M, Class T for zero to 1,200 amperes, 300 volts; and zero to 800 amperes, 600 volts.

2.14 RECEPTACLES

UL 498, heavy-duty, grounding-type. Hospital grade where stated in the Delivery or Task Order. Ratings and configurations shall be as indicated.

Bodies shall be color as stated in the Delivery or Task Order, per NEMA WD

1. Face and body shall be thermoplastic supported on a metal mounting strap. Dimensional requirements shall be per NEMA WD 6. Provide screw-type, side-wired wiring terminals or of the solderless pressure type having suitable conductor-release arrangement. Connect grounding pole to mounting strap. The receptacle shall contain triple-wipe power contacts and double or triple-wipe ground contacts.

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2.14.1 Switched Duplex Receptacles

Provide separate terminals for each ungrounded pole. Top receptacle shall be switched when installed.

2.14.2 Weatherproof Receptacles

Provide in cast metal box with gasketed, weatherproof, cast-metal cover plate and gasketed cap over each receptacle opening. Provide caps with a spring-hinged flap. Receptacle shall be UL listed for use in "wet locations with plug in use."

2.14.3 Ground-Fault Circuit Interrupter Receptacles

UL 943, duplex type for mounting in standard outlet box. Device shall be capable of detecting current leak of 6 milliamperes or greater and tripping per requirements of UL 943 for Class A GFCI devices. Provide screw-type, side-wired wiring terminals or pre-wired (pigtail) leads.

2.14.4 Special Purpose Receptacles

Provide special purpose receptacles in ratings indicated.

2.14.5 Plugs

Provide heavy-duty, rubber-covered multi-wire cord of required size, install plugs thereon, and attach to equipment. Plugs shall be UL listed with receptacles, complete with grounding blades. Where equipment is not available, turn over plugs and cord assemblies to the Government.

2.14.6 Range Receptacles

NEMA 14-50 configuration, flush mounted for housing units, rated 50 amperes, 125/250 volts. Furnish one matching plug with receptacle.

2.14.7 Dryer Receptacles

NEMA 14-30 configuration, rated 30 amperes, 125/250 volts. Furnish one matching plug with each receptacle.

2.14.8 Tamper-Resistant Receptacles

Provide duplex receptacle with mechanical sliding shutters that prevent the insertion of small objects into its contact slots.

2.15 PANELBOARDS

UL 67 and UL 50 having a short-circuit current rating as indicated, 10,000 amperes symmetrical minimum. Panelboards for use as service disconnecting means shall additionally conform to UL 869A. Panelboards shall be circuit breaker-equipped unless indicated otherwise. Design shall be such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL. "Specific breaker placement" is required in panelboards to match the breaker placement indicated in the panelboard schedule on the drawings. Use of "Subfeed Breakers" is not acceptable unless specifically indicated otherwise. Main breaker shall be

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"separately" mounted "above" or "below" branch breakers. Where "space only" is indicated, make provisions for future installation of breakers.

Directories shall indicate load served by each circuit in panelboard.

Directories shall also indicate source of service to panelboard (e.g., Panel PA served from Panel MDP). Provide new directories for existing panels modified by this project as indicated. Type directories and mount in holder behind transparent protective covering. Panelboards shall be listed and labeled for their intended use. Panelboard shall have nameplates in accordance with paragraph FIELD FABRICATED NAMEPLATES.

2.15.1 Enclosure

Enclosures shall meet the requirements of UL 50. All cabinets shall be fabricated from sheet steel of not less than No. 10 gauge if flush-mounted or mounted outdoors, and not less than No. 12 gauge if surface-mounted indoors, with full seam-welded box ends. Cabinets mounted outdoors or flush-mounted shall be hot-dipped galvanized after fabrication. Cabinets shall be painted in accordance with paragraph PAINTING. Outdoor cabinets shall be of NEMA 3R raintight with conduit hubs welded to the cabinet or with a removable steel plate 1/4 inch thick in the bottom for field drilling for conduit connections. Front edges of cabinets shall be form-flanged or fitted with structural shapes welded or riveted to the sheet steel, for supporting the panelboard front. All cabinets shall be so fabricated that no part of any surface on the finished cabinet shall deviate from a true plane by more than 1/8 inch. Holes shall be provided in the back of indoor surface-mounted cabinets, with outside spacers and inside stiffeners, for mounting the cabinets with a 1/2 inch clear space between the back of the cabinet and the wall surface. Flush doors shall be mounted on hinges that expose only the hinge roll to view when the door is closed. Each door shall be fitted with a combined catch and lock, except that doors over 24 inches long shall be provided with a three-point latch having a knob with a T-handle, and a cylinder lock. Two keys shall be provided with each lock, and all locks shall be keyed alike. Finished-head cap screws shall be provided for mounting the panelboard fronts on the cabinets.

2.15.2 Panelboard Buses

Panelboards shall have copper buses. Support bus bars on bases independent of circuit breakers. Main buses and back pans shall be designed so that breakers may be changed without machining, drilling, or tapping. Provide isolated neutral bus in each panel for connection of circuit neutral conductors. Provide separate ground bus identified as equipment grounding bus per UL 67 for connecting grounding conductors; bond to steel cabinet.

In addition to equipment grounding bus, provide second "isolated" ground bus, where indicated.

2.15.2.1 Panelboard Neutrals for Non-Linear Loads

UL listed, and panelboard type shall have been specifically UL heat rise tested for use on non-linear loads. Panelboard shall be heat rise tested in accordance with UL 67, except with the neutral assembly installed and carrying 200 percent of the phase bus current during testing. Verification of the testing procedure shall be provided upon request. Two neutral assemblies paralleled together with cable is not acceptable. Nameplates for panelboard rated for use on non-linear loads shall be marked "SUITABLE FOR NON-LINEAR LOADS"and shall be in accordance with paragraph FIELD FABRICATED

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NAMEPLATES. Provide a neutral label with instructions for wiring the neutral of panelboards rated for use on non-linear loads.

2.15.3 Circuit Breakers

UL 489, thermal magnetic-type or solid state-type having a minimum short-circuit current rating equal to the short-circuit current rating of the panelboard in which the circuit breaker shall be mounted. Breaker terminals shall be UL listed as suitable for type of conductor provided. Where indicated on the drawings, provide circuit breakers with shunt trip devices.

All main, feeder, and branch circuit breakers shall be bolted to the buss.

Series rated circuit breakers and plug-in circuit breakers are unacceptable.

2.15.3.1 Multipole Breakers

Provide common trip-type with single operating handle. Breaker design shall be such that 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 A, B, and C, respectively.

2.15.3.2 Circuit Breaker With GFCI

UL 943 and NFPA 70. Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect and trip on current imbalance of 6 milliamperes or greater per requirements of UL 943 for Class A GFCI devices, for personnel protection, and 20 milliamperes or greater per requirements of UL 943 for Class B GFCI per equipment protection.

2.15.3.3 Circuit Breakers for HVAC Equipment

Circuit breakers for HVAC equipment having motors (group or individual) shall be marked for use with HACR type and UL listed as HACR type.

2.15.3.4 Arc-Fault Circuit-Interrupters

UL 489, UL 1699 and NFPA 70. Molded case circuit breaker shall be rated as indicated. Two pole arc-fault circuit-interrupters shall be rated 120/240 volts. The provision of (two) one pole circuit breakers for shared neutral circuits in lieu of (one) two pole circuit breaker is unacceptable. Provide with "push-to-test" button.

2.15.4 Fusible Switches for Panelboards

NEMA KS 1, hinged door-type. Switches serving as motor disconnect means shall be horsepower rated.

2.15.5 400 Hz Panelboard and Breakers

Panelboards and breakers for use on 400 Hz systems shall be "400 Hz" rated and labeled.

2.16 ENCLOSED CIRCUIT BREAKERS

UL 489. Individual molded case circuit breakers with voltage and continuous current ratings, number of poles, overload trip setting, and short circuit current interrupting rating as indicated. Enclosure type as indicated.

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2.17 MOTOR SHORT-CIRCUIT PROTECTOR (MSCP)

2.17.1 General

Motor short-circuit protectors shall conform to UL 508 and UL 489 and shall be provided as shown. Protectors shall be used only as part of a combination motor controller which provides coordinated motor branch-circuit overload and short-circuit protection, and shall be rated in accordance with the requirements of NFPA 70.

2.17.2 Construction

Motor short-circuit protector bodies shall be constructed of high temperature, dimensionally stable, long life, non-hygroscopic materials.

Protectors shall fit special MSCP mounting clips and shall not be interchangeable with any commercially available fuses. Protectors shall have 100 percent one-way interchangeability within the A-Y letter designations. All ratings shall be clearly visible.

2.17.3 Ratings

Voltage ratings shall be not less than the applicable circuit voltage.

Letter designations shall be A through Y for motor controller Sizes 0, 1, 2, 3, 4, and 5, with 100,000 amperes interrupting capacity rating. Letter designations shall correspond to controller sizes as follows:

CONTROLLER SIZE MSCP DESIGNATION

NEMA 0 A-N

NEMA 1 A-P

NEMA 2 A-S

NEMA 3 A-U

NEMA 4 A-W

NEMA 5 A-Y

2.18 TRANSFORMERS

NEMA ST 20, general purpose, dry-type, self-cooled, ventilated, with copper windings. Provide transformers in NEMA 1 or 3R enclosure as stated in the Delivery or Task Order. Transformer shall have 220 degrees C insulation system for transformers 15 kVA and greater, and shall have 180 degrees C insulation for transformers rated 10 kVA and less, with temperature rise not exceeding 150 degrees C under full-rated load in maximum ambient of 40 degrees C. Transformer of 150 degrees C temperature rise shall be capable of carrying continuously 100 percent of nameplate kVA without exceeding insulation rating. Transformers shall be quiet type with maximum sound level at least 3 decibels less than NEMA standard level for transformer ratings indicated

2.18.1 Specified Transformer Efficiency

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Transformers, indicated and specified with: 480V primary, 80 degrees C or 115 degrees C temperature rise, kVA ratings of 37.5 to 100 for single phase or 30 to 500 for three phase, shall be energy efficient type. Minimum efficiency, based on factory test results, shall not be less than NEMA Class 1 efficiency as defined by NEMA TP 1.

2.18.2 Transformers With Non-Linear Loads

Transformer insulation shall be a UL recognized 220 degrees C system.

Neither the primary nor the secondary temperature shall exceed 220 degrees C at any point in the coils while carrying their full rating of non-sinusoidal load. Transformers are to be UL listed and labeled for K-Factor rating as indicated in accordance with UL 1561. Transformers evaluated by the UL K- Factor evaluation shall be listed for 80 degrees C average temperature rise only. Transformers with K-Factor ratings with temperature rise of 150 degrees C rise shall not be acceptable. K-Factor rated transformers shall have an impedance range of 3 percent to 5 percent, and shall have a minimum reactance of 2 percent to prevent excessive neutral current when supplying loads with large amounts of third harmonic.

2.19 MOTORS

NEMA MG 1, except fire pump motors shall be as specified in Section 21 30 00 FIRE PUMPS; hermetic-type sealed motor compressors shall also comply with UL

984. Provide the size in terms of HP, or kVA, or full-load current, or a combination of these characteristics, and other characteristics, of each motor as indicated or specified. Determine specific motor characteristics to ensure provision of correctly sized starters and overload heaters.

Motors for operation on 208-volt, 3-phase circuits shall have terminal voltage rating of 200 volts, and those for operation on 480-volt, 3-phase circuits shall have terminal voltage rating of 460 volts. Motors shall be designed to operate at full capacity with voltage variation of plus or minus 10 percent of motor voltage rating. Unless otherwise indicated, motors rated 1 HP and above shall be continuous duty type and shall be provided with a NEMA rated standard magnetic starter. Do not provide magnetic starters based on IEC ratings.

Where fuse protection is specifically recommended by the equipment manufacturer, provide fused switches in lieu of non-fused switches

2.19.1 High Efficiency Single-Phase Motors

Single-phase fractional-horsepower alternating-current motors shall be high efficiency types corresponding to the applications listed in NEMA MG 11. In exception, for motor-driven equipment with a minimum seasonal or overall efficiency rating, such as a SEER rating, provide equipment with motor to meet the overall system rating indicated.

2.19.2 Premium Efficiency Polyphase Motors

Polyphase motors shall be selected based on high efficiency characteristics relative to typical characteristics and applications as listed in NEMA MG

10. In addition, continuous rated, polyphase squirrel-cage medium induction motors shall meet the requirements for premium efficiency electric motors in accordance with NEMA MG 1, including the NEMA full load efficiency ratings.

In exception, for motor-driven equipment with a minimum seasonal or overall

SECTION 26 20 00 Page 24 efficiency rating, such as a SEER rating, provide equipment with motor to meet the overall system rating indicated.

2.19.3 Motor Sizes

Provide size for duty to be performed, not exceeding the full-load nameplate current rating when driven equipment is operated at specified capacity under most severe conditions likely to be encountered. When motor size provided differs from size indicated or specified, make adjustments to wiring, disconnect devices, and branch circuit protection to accommodate equipment actually provided. Provide controllers for motors rated 1-hp and above with electronic phase-voltage monitors designed to protect motors from phase-loss, undervoltage, and overvoltage. Provide protection for motors from immediate restart by a time adjustable restart relay.

2.19.4 Wiring and Conduit

Provide internal wiring for components of packaged equipment as an integral part of the equipment. Provide power wiring and conduit for field-installed equipment, and motor control equipment forming part of motor control centers or switchgear assemblies, the conduit and wiring connecting such centers, assemblies, or other power sources to equipment as specified herein. Power wiring and conduit shall conform to the requirements specified herein.

Control wiring shall be provided under, and conform to the requirements of the section specifying the associated equipment.

2.20 MOTOR CONTROLLERS

UL 508, NEMA ICS 1, and NEMA ICS 2, except fire pump controllers shall be as specified in Section 21 30 00 FIRE PUMPS. Controllers shall have thermal overload protection in each phase and shall have one spare normally open and one spare normally closed auxiliary contact. Provide controllers for motors rated 1-hp and above with electronic phase-voltage monitors designed to protect motors from phase-loss, undervoltage, and overvoltage. Provide protection for motors from immediate restart by a time adjustable restart relay. Magnetic-type motor controllers shall have undervoltage protection when used with momentary-contact pushbutton stations or switches and shall have undervoltage release when used with maintained-contact pushbutton stations or switches. When used with pressure, float, or similar automatic-type or maintained-contact switch, controller shall have hand/off/automatic selector switch. Connections to selector switch shall be such that only normal automatic regulatory control devices are bypassed when switch is in "hand" position. Safety control devices, such as low and high pressure cutouts, high temperature cutouts, and motor overload protective devices, shall be connected in motor control circuit in "hand" and "automatic" positions. Control circuit connections to hand/off/automatic selector switch or to more than one automatic regulatory control device shall be made in accordance with indicated or manufacturer's approved wiring diagram.

Selector switch shall have means for locking in any position. For each motor not in sight of controller or where controller disconnecting means is not in sight of motor location and driven machinery location, controller disconnecting means shall be capable of being locked in open position. As an alternative, provide a manually operated, lockable, nonfused switch which disconnects motor from supply source within sight of motor. Overload protective devices shall provide adequate protection to motor windings; be thermal inverse-time-limit type; and include manual reset-type pushbutton on outside of motor controller case. Cover of combination motor controller and

SECTION 26 20 00 Page 25 manual switch or circuit breaker shall be interlocked with operating handle of switch or circuit breaker so that cover cannot be opened unless handle of switch or circuit breaker is in "off" position. Minimum short circuit withstand rating of combination motor controller shall be in rms symmetrical amperes as stated in the Delivery or Task Order. Provide controllers in hazardous locations with classifications as indicated.

2.20.1 Control Wiring

All control wire shall be stranded tinned copper switchboard wire with 600-volt flame-retardant insulation Type SIS meeting UL 44, or Type MTW meeting UL 1063, and shall pass the VW-1 flame tests included in those standards.

Hinge wire shall have Class K stranding. Current transformer secondary leads shall be not smaller than No. 10 AWG. The minimum size of control wire shall be No. 14 AWG. Power wiring for 480-volt circuits and below shall be of the same type as control wiring and the minimum size shall be No. 12 AWG. Special attention shall be given to wiring and terminal arrangement on the terminal blocks to permit the individual conductors of each external cable to be terminated on adjacent terminal points.

2.20.2 Control Circuit Terminal Blocks

NEMA ICS 4. Control circuit terminal blocks for control wiring shall be molded or fabricated type with barriers, rated not less than 600 volts. The terminals shall be removable binding, fillister or washer head screw type, or of the stud type with contact and locking nuts. The terminals shall be not less than No. 10 in size and shall have sufficient length and space for connecting at least two indented terminals for 10 AWG conductors to each terminal.