16402N Interior Distribution System.pdf

USACE / NAVFAC / AFCESA / NASA UFGS-26 20 00 (July 2007) Preparing Activity: NAVFAC Replacing without change UFGS-16402 (April 2006)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated March 2008

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

07/07

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

1.4.1 Fuses

1.4.2 Regulatory Requirements

1.4.3 Standard Products

1.4.3.1 Alternative Qualifications

1.4.3.2 Material and Equipment Manufacturing Date

1.5 MAINTENANCE

1.5.1 Electrical Systems

1.6 WARRANTY

1.7 SEISMIC REQUIREMENTS

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.2 CONDUIT AND FITTINGS

2.2.1 Rigid Metallic Conduit

2.2.1.1 Rigid, Threaded Zinc-Coated Steel Conduit

2.2.1.2 Rigid Aluminum Conduit

2.2.2 Rigid Nonmetallic Conduit

2.2.3 Intermediate Metal Conduit (IMC)

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

2.2.5 Plastic-Coated Rigid Steel and IMC Conduit

2.2.6 Flexible Metal Conduit

2.2.6.1 Liquid-Tight Flexible Metal Conduit, Steel

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

2.2.7.1 Fittings for Rigid Metal Conduit and IMC

2.2.7.2 Fittings for EMT

2.2.8 Fittings for Rigid Nonmetallic Conduit

2.2.9 Liquid-Tight Flexible Nonmetallic Conduit

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

SECTION 26 20 00 Page 1

2.3.2 Surface Nonmetallic Raceway

2.4 BUSWAY

2.4.1 Feeder Busways

2.4.2 Plug-In Busways

2.5 CABLE TRAYS

2.5.1 Basket-Type Cable Trays

2.5.2 Trough-Type Cable Trays

2.5.3 Ladder-Type Cable Trays

2.5.4 Channel-Type Cable Trays

2.5.5 Solid Bottom-Type Cable Trays

2.5.6 Cantilever

2.6 OPEN TELECOMMUNICATIONS CABLE SUPPORT

2.6.1 Open Top Cable Supports

2.6.2 Closed Ring Cable Supports

2.7 OUTLET BOXES AND COVERS

2.7.1 Floor Outlet Boxes

2.7.2 Outlet Boxes for Telecommunications System

2.7.3 Clock Outlet for Use in Other Than Wired Clock System

2.8 CABINETS, JUNCTION BOXES, AND PULL BOXES

2.9 WIRES AND CABLES

2.9.1 Conductors

2.9.1.1 Equipment Manufacturer Requirements

2.9.1.2 Aluminum Conductors

2.9.1.3 Minimum Conductor Sizes

2.9.2 Color Coding

2.9.3 Insulation

2.9.4 Bonding Conductors

2.9.4.1 Telecommunications Bonding Backbone (TBB)

2.9.4.2 Bonding Conductor for Telecommunications

2.9.5 Service Entrance Cables

2.9.6 Nonmetallic Sheathed Cable

2.9.7 Wire and Cable for 400 Hertz (Hz) Circuits

2.9.8 Metal-Clad Cable

2.9.9 Armored Cable

2.9.10 Mineral-Insulated, Metal-Sheathed Cable

2.9.11 Flat Conductor Cable

2.9.12 Cable Tray Cable or Power Limited Tray Cable

2.9.13 Cord Sets and Power-Supply Cords

2.10 SPLICES AND TERMINATION COMPONENTS

2.11 DEVICE PLATES

2.12 SWITCHES

2.12.1 Toggle Switches

2.12.2 Switch with Red Pilot Handle

2.12.3 Breakers Used as Switches

2.12.4 Disconnect Switches

2.13 FUSES

2.13.1 Fuseholders

2.13.2 Cartridge Fuses, Current Limiting Type (Class R)

2.13.3 Cartridge Fuses, High-Interrupting Capacity, Current Limiting

Type (Classes J, L, and CC)

2.13.4 Cartridge Fuses, Current Limiting Type (Class T)

2.14 RECEPTACLES

2.14.1 Switched Duplex Receptacles

2.14.2 Weatherproof Receptacles

2.14.3 Ground-Fault Circuit Interrupter Receptacles

2.14.4 Special Purpose Receptacles

2.14.5 Plugs

2.14.6 Range Receptacles

2.14.7 Dryer Receptacles

SECTION 26 20 00 Page 2

2.14.8 Tamper-Resistant Receptacles

2.15 PANELBOARDS

2.15.1 Enclosure

2.15.2 Panelboard Buses

2.15.2.1 Panelboard Neutrals for Non-Linear Loads

2.15.3 Circuit Breakers

2.15.3.1 Multipole Breakers

2.15.3.2 Circuit Breaker With[ GFCI][ GFI]

2.15.3.3 Circuit Breakers for HVAC Equipment

2.15.3.4 Arc-Fault Circuit-Interrupters

2.15.4 Fusible Switches for Panelboards

2.15.5 400 Hz Panelboard and Breakers

2.16 RESIDENTIAL LOAD CENTERS

2.16.1 RLC Buses

2.16.2 Circuit Breakers

2.16.2.1 Multipole Breakers

2.16.2.2 Circuit Breaker With[ GFCI][ GFI]

2.16.2.3 Arc-Fault Circuit-Interrupters

2.17 LOAD CENTERS FOR HOUSING UNITS

2.17.1 Panelboard Buses

2.17.2 Circuit Breakers

2.17.2.1 Multipole Breakers

2.17.2.2 Arc-Fault Circuit-Interrupters

2.18 ENCLOSED CIRCUIT BREAKERS

2.19 MOTOR SHORT-CIRCUIT PROTECTOR (MSCP)

2.20 TRANSFORMERS

2.20.1 Specified Transformer Efficiency

2.20.2 Transformers With Non-Linear Loads

2.21 MOTORS

2.21.1 High Efficiency Single-Phase Motors

2.21.2 Premium Efficiency Polyphase Motors

2.21.3 Motor Sizes

2.21.4 Wiring and Conduit

2.22 MOTOR CONTROLLERS

2.22.1 Control Wiring

2.22.2 Control Circuit Terminal Blocks

2.22.2.1 Types of Terminal Blocks

2.22.3 Control Circuits

2.22.4 Enclosures for Motor Controllers

2.22.5 Multiple-Speed Motor Controllers and Reversible Motor

Controllers

2.22.6 Pushbutton Stations

2.22.7 Pilot and Indicating Lights

2.22.8 Reduced-Voltage Controllers

2.23 MANUAL MOTOR STARTERS (MOTOR RATED SWITCHES)

2.23.1 Pilot Lights

2.24 MOTOR CONTROL CENTERS

2.24.1 Bus Systems

2.24.1.1 Horizontal and Main Buses

2.24.1.2 Vertical Bus

2.24.1.3 Ground Bus

2.24.1.4 Neutral Bus

2.24.2 Motor Disconnecting Devices and Controllers

2.24.3 Combination Motor Controllers

2.24.4 Space Heaters

2.25 LOCKOUT REQUIREMENTS

2.26 TELECOMMUNICATIONS SYSTEM

2.27 COMMUNITY ANTENNA TELEVISION (CATV) SYSTEM

2.27.1 CATV Outlets

SECTION 26 20 00 Page 3

2.27.2 CATV Faceplates

2.27.3 Backboards

2.28 GROUNDING AND BONDING EQUIPMENT

2.28.1 Ground Rods

2.28.2 Ground Bus

2.28.3 Telecommunications [and CATV]Grounding Busbar

2.29 HAZARDOUS LOCATIONS

2.30 MANUFACTURER'S NAMEPLATE

2.31 FIELD FABRICATED NAMEPLATES

2.32 WARNING SIGNS

2.33 FIRESTOPPING MATERIALS

2.34 WIREWAYS

2.35 METERING

2.36 METER BASE ONLY

2.37 SURGE PROTECTIVE DEVICES

2.38 FACTORY APPLIED FINISH

2.39 SOURCE QUALITY CONTROL

2.39.1 Transformer Factory Tests

2.40 COORDINATED POWER SYSTEM PROTECTION

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Underground Service

3.1.2 Overhead Service

3.1.3 Hazardous Locations

3.1.4 Service Entrance Identification

3.1.4.1 Labels

3.1.5 Wiring Methods

3.1.5.1 Pull Wire

3.1.5.2 Metal Clad Cable

3.1.5.3 Armored Cable

3.1.5.4 Flat Conductor Cable

3.1.6 Conduit Installation

3.1.6.1 Restrictions Applicable to Aluminum Conduit

3.1.6.2 Restrictions Applicable to EMT

3.1.6.3 Restrictions Applicable to Nonmetallic Conduit

3.1.6.4 Restrictions Applicable to Flexible Conduit

3.1.6.5 Service Entrance Conduit, Overhead

3.1.6.6 Service Entrance Conduit, Underground

3.1.6.7 Underground Conduit Other Than Service Entrance

3.1.6.8 Conduit Interior to Buildings for 400 Hz Circuits

3.1.6.9 Conduit for Circuits Rated Greater Than 600 Volts

3.1.6.10 Conduit Installed Under Floor Slabs

3.1.6.11 Conduit Through Floor Slabs

3.1.6.12 Conduit Installed in Concrete Floor Slabs

3.1.6.13 Stub-Ups

3.1.6.14 Conduit Support

3.1.6.15 Directional Changes in Conduit Runs

3.1.6.16 Locknuts and Bushings

3.1.6.17 Flexible Connections

3.1.6.18 Telecommunications and Signal System Pathway

3.1.6.19 Community Antenna Television (CATV) System Conduits

3.1.7 Busway Installation

3.1.8 Cable Tray Installation

3.1.9 Telecommunications Cable Support Installation

3.1.10 Boxes, Outlets, and Supports

3.1.10.1 Boxes

3.1.10.2 Pull Boxes

SECTION 26 20 00 Page 4

3.1.10.3 Extension Rings

3.1.11 Mounting Heights

3.1.12 Nonmetallic Sheathed Cable Installation

3.1.13 Mineral Insulated, Metal Sheathed (Type MI) Cable Installation

3.1.14 Conductor Identification

3.1.14.1 Marking Strips

3.1.15 Splices

3.1.15.1 Splices of Aluminum Conductors

3.1.16 Terminating Aluminum Conductors

3.1.16.1 Termination to Copper Bus

3.1.16.2 Termination to Aluminum Bus

3.1.17 Covers and Device Plates

3.1.18 Electrical Penetrations

3.1.19 Grounding and Bonding

3.1.19.1 Ground Rods

3.1.19.2 Grounding Connections

3.1.19.3 Ground Bus

3.1.19.4 Resistance

3.1.19.5 Telecommunications System

3.1.20 Equipment Connections

3.1.21 Elevator

3.1.22 Government-Furnished Equipment

3.1.23 Repair of Existing Work

3.1.23.1 Workmanship

3.1.23.2 Existing Concealed Wiring to be Removed

3.1.23.3 Removal of Existing Electrical Distribution System

3.1.23.4 Continuation of Service

3.1.24 Watthour Meters

3.1.25 Surge Protective Devices

3.2 FIELD FABRICATED NAMEPLATE MOUNTING

3.3 WARNING SIGN MOUNTING

3.4 FIELD APPLIED PAINTING

3.5 FIELD QUALITY CONTROL

3.5.1 Devices Subject to Manual Operation

3.5.2 600-Volt Wiring Test

3.5.3 Transformer Tests

3.5.4 Ground-Fault Receptacle Test

3.5.5 Grounding System Test

3.5.6 Watthour Meter

-- End of Section Table of Contents --

SECTION 26 20 00 Page 5

USACE / NAVFAC / AFCESA / NASA UFGS-26 20 00 (July 2007) Preparing Activity: NAVFAC Replacing without change UFGS-16402 (April 2006)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated March 2008

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

07/07

NOTE: This guide specification covers the requirements for the procurement, installation, and testing of electrical wiring systems for construction projects.

Telecommunications cabling is covered in Section

27 10 00, BUILDING TELECOMMUNICATIONS CABLING

SYSTEM. These wiring systems primarily involve voltages of 1,000 volts and less and mainly involve interior systems. When voltages greater than 1,000 volts are brought into a facility, consult and use Section 33 71 02.00 20, UNDERGROUND TRANSMISSION AND

DISTRIBUTION; L-16303N, UNDERGROUND ELECTRICAL WORK;

Section 26 11 13, SECONDARY UNIT SUBSTATIONS; and Section 26 12 19.10, PAD-MOUNTED TRANSFORMERS for Navy projects and Section 33 71 01, ELECTRICAL DISTRIBUTION SYSTEM, AERIAL; Section 33 70 02.00 10, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND; and Section 26 11 14.00 10, MAIN ELECTRIC SUPPLY STATION AND SUBSTATION on Army projects as required.

Requirements for materials and procedures for special or unusual design should be added as necessary to fit specific projects.

Edit this guide specification for project specific requirements by adding, deleting, or revising text.

For bracketed items, choose applicable items(s) or insert appropriate information.

Remove information and requirements not required in respective project, whether or not brackets are present.

Comments and suggestion on this specification are welcome and should be directed to the technical proponent of the specification. A listing of the technical proponents, including their organization designation and telephone number, is on the Internet.

SECTION 26 20 00 Page 6

NOTE: The following information shall be shown on the project drawings:

1. Location of equipment

2. Single-line diagrams elevations, limiting dimensions, and equipment ratings which are not covered in the specifications

3. Remote indicating or control requirements.

PART 1 GENERAL

1.1 REFERENCES

NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.

Use the Reference Wizard's Check Reference feature when you add a RID outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates.

References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.

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

SECTION 26 20 00 Page 7

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2007; Errata 2007) National Electrical Safety Code

IEEE Std 100 (2000) The Authoritave 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 (2001) 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)

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) 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

SECTION 26 20 00 Page 8

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) 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

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) 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) National Electrical Code - 2008 Edition

NFPA 70E (2004; AMD 2004) Electrical Safety in the Workplace

SECTION 26 20 00 Page 9

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

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 1660 (2004; Rev thru Jan 2005) Liquid-Tight Flexible Nonmetallic Conduit

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 (1996; Rev thru Jun 2001) Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories

SECTION 26 20 00 Page 10

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

UL 508 (1999; Rev thru Jul 2005) Standard for Industrial Control Equipment

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

UL 512 (1993; Rev thru Mar 1999) 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 Mar 2007) Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers

UL 5A (2003) Nonmetallic Surface Raceways and Fittings

UL 6 (2007) Standard for Electrical Rigid Metal Conduit-Steel

SECTION 26 20 00 Page 11

UL 651 (2005; Rev thru May 2007) Standard for Schedule 40 and 80 Rigid PVC Conduit and Fittings

UL 67 (1993; Rev thru Apr 2006) 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 (2003; Rev thru Apr 2006) Standard for Thermoplastic-Insulated Wires and Cables

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

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) Ground-Fault Circuit-Interrupters

UL 984 (1996; Rev thru Sept 2005) Hermetic Refrigerant Motor-Compressors

SECTION 26 20 00 Page 12

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

NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control.

A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractor’s Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.

For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the "G" designation to indicate the approving authority.

Codes for Army projects using the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District Office (Engineering Division or other organization in the District Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office. Codes following the "G" typically are not used for Navy, Air Force, and NASA projects.

Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.

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

submittals not having a "G" designation are[ for Contractor Quality Control approval][ 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][; G, [_____]]

Transformers[; G][; G, [_____]]

Busway[; G][; G, [_____]]

Cable trays[; G][; G, [_____]]

SECTION 26 20 00 Page 13

Motor control centers[; G][; 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. Wiring diagrams shall identify circuit terminals and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Drawings shall indicate adequate clearance for operation, maintenance, and replacement of operating equipment devices.

Wireways[; G][; G, [_____]]

[Load centers for housing units[; G][; G, [_____]]]

Marking strips drawings[; G][; G, [_____]]

SD-03 Product Data

Receptacles[; G][; G, [_____]]

Circuit breakers[; G][; G, [_____]]

Switches[; G][; G, [_____]]

Transformers[; G][; G, [_____]]

Enclosed circuit breakers[; G][; G, [_____]]

Motor controllers[; G][; G, [_____]]

[Combination motor controllers[; G][; G, [_____]]]

[Load centers for housing units[; G][; G, [_____]]]

Manual motor starters[; G][; G, [_____]]

[Residential load centers[; G][; G, [_____]]]

[Metering[; G][; G, [_____]]]

[Meter base only[; G][; G, [_____]]]

CATV outlets[; G][; G, [_____]]

Telecommunications Grounding Busbar[; G][; G, [_____]]

Surge protective devices[; G][; G, [_____]]

Submittals shall include performance and characteristic curves.

SD-06 Test Reports

600-volt wiring test[; G][; G, [_____]]

Grounding system test[; G][; G, [_____]]

Transformer tests[; G][; G, [_____]]

SECTION 26 20 00 Page 14

Ground-fault receptacle test[; G][; G, [_____]]

SD-07 Certificates

Fuses[; G][; G, [_____]]

SD-09 Manufacturer's Field Reports

Transformer factory tests

[ SD-10 Operation and Maintenance Data

NOTE: Delete SD-10 and its subparagraph on LANTNAVFACENGCOM projects unless "metering" or other special equipment is added to the section which requires O&M manuals.

Electrical Systems, Data Package 5[; G][; G, [_____]]

[Metering, Data Package 5[; G][; G, [_____]]]

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

]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.

SECTION 26 20 00 Page 15

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

NOTE: Delete subparagraph on LANTNAVFACENGCOM projects unless "metering" or other special equipment is added to the section which requires O&M manuals.

[1.5.1 Electrical Systems

Submit 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

NOTE: Do not use this paragraph for Navy projects.

When directed to meet Seismic Requirements, Section 13080 and Section 16070A) must be edited to suit the project and be included in the contract documents.

Edit the following paragraph and include it in the project specification. When a Government designer is the Engineer of Record, provide seismic requirements on the drawings.

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]][ be as indicated].

SECTION 26 20 00 Page 16

]PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

NOTE: Choose the last bracketed sentence for Army projects.

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.

2.2 CONDUIT AND FITTINGS

NOTE: For Navy projects, do not use Electrical Nonmetallic Tubing (ENT) without specific written approval from the cognizant electrical design branch manager.

Malleable iron seal electrical fittings shall be used in fuel valve pits and similar locations where fittings are exposed to potential freeze thaw environments. Nonmetallic fittings have failed in these environments.

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

NOTE: Do not use fiberglass in buildings. With advanced approval, for acceptable reasons, it may be used for service entrance or below grade use.

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.

SECTION 26 20 00 Page 17

2.2.5 Plastic-Coated Rigid Steel and IMC Conduit

NEMA RN 1, Type 40( one millimeter (40 mils) 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

NOTE: Use steel for SOUTHNAVFACENGCOM projects.

[Steel][Die cast] compression type.

2.2.8 Fittings for Rigid Nonmetallic Conduit

NOTE: Do not use fiberglass in buildings. With advanced approval, for acceptable reasons, it may be used for service entrance or below grade use.

NEMA TC 3 for PVC[ and NEMA TC 14 for fiberglass], and UL 514B.

2.2.9 Liquid-Tight Flexible Nonmetallic Conduit

NOTE: Do not use liquid-tight flexible nonmetallic conduits in Continental United States (CONUS). In overseas locations, only use when allowed by the Authority Having Jurisdiction.

UL 1660.

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 minimum of one every [455] [_____] mm [18] [_____] inches.][ Alternate receptacles shall be wired on different circuits.]

SECTION 26 20 00 Page 18

2.3.2 Surface Nonmetallic Raceway

NOTE: Designer should coordinate with the Authority Having Jurisdiction responsible for the construction contract regarding the use of this wiring method in the project.

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 minimum of one every [455] [_____] mm [18] [_____] inches.][ Alternate receptacles shall be wired on different circuits.]

2.4 BUSWAY

NOTE: Phase sequence of voltages, orientation, etc., should be indicated on the drawings for existing transformers, switchboards, switchgear, motor control centers, etc.

NEMA BU 1.1, UL 857. Buses shall be[ copper][ or][ aluminum]. Busways shall be rated [_____] volts, [_____] continuous current amperes, three-phase,[ three-][ four-]wire, and include integral or internal[ 50-percent] ground bus. Short circuit rating shall be[ [_____] root mean square (rms) symmetrical amperes minimum][ as indicated].[ Busway systems shall be suitable for use indoors.] Enclosures shall be[ steel][ aluminum] [ metallic]. 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 deenergizing 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 1830 mm 6 feet of floors shall be unventilated,][ unventilated, totally enclosed] 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[ fusible, handle-operated, switch type, horsepower-rated][ circuit breaker-type][ handle-operated, switch type, equipped with high interrupting-capacity, current-limiting fuses]. 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.].

SECTION 26 20 00 Page 19

2.5 CABLE TRAYS

NOTE: Show cable tray layout on the drawings. When using multiple types and sizes, indicate size and type of cable trays on the drawings. When using "as indicated" option, insure information required is shown on the drawings.

NEMA VE 1. Cable trays shall form a wireway system, and shall be of nominal[ [75] [100] [150] mm ([ 3][ 4][ 6] inch) [3] [4] [6] inch] depth[ as indicated]. Cable trays shall be constructed of[ aluminum][ copper-free aluminum][ 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 [305] [610] [915] mm ([ 12][ 24][ 36] inches) [12] [24] [36] inches.][ Radius of bends shall be as indicated.]

2.5.1 Basket-Type Cable Trays

NOTE: Basket cable tray is a fabricated structure consisting of wire mesh bottom and side rails.

Provide[ size as indicated][ of nominal[ 50,][ 100,][ 150,][ 200,][ 300,][ 450,][ and][ 600] mm ([2,][ 4,][ 6,][ 8,][ 12,][ 18,][ and][ 24] inch)[ 2,][ 4,][ 6,][ 8,][ 12,][ 18,][ and][ 24] inch width and [ 25,][ 50,][ and][ 100] mm ([1,][ 2,][ and][ 4] inch)[ 1,][ 2,][ and][ 4] inch depth] with maximum wire mesh spacing of 50 by 100 mm (2 by 4 inch) 2 by 4 inch.

2.5.2 Trough-Type Cable Trays

NOTE: Trough or ventilated cable tray is a fabricated structure consisting of integral or separate longitudinal rails and a bottom having openings sufficient for the passage of air and utilizing 75% or less of the plan area of the surface to support cables.

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760] [915] mm ([ 6][ 12][ 18][ 24][ 30][ 36] inch) [6] [12] [18] [24] [30] [36] inch width].

2.5.3 Ladder-Type Cable Trays

NOTE: Ladder cable tray is a fabricated structure consisting of two longitudinal side rails connected by individual transverse members (rungs).

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760] [915] mm ([6] [12] [18] [24] [30] [36] inch) [6] [12] [18] [24] [30] [36] inch

SECTION 26 20 00 Page 20 width] with maximum rung spacing of [150] [225] [305] [455] mm ([6][9][12][18]) [6] [9] [12] [18] inches.

2.5.4 Channel-Type Cable Trays

NOTE: Channel cable tray is a fabricated structure consisting of a one-piece ventilated-bottom or solid-bottom channel section, not exceeding 152 mm (6 inches)6 inches in width.

Provide [ size as indicated][ of nominal [75] [100] [150] mm ([3][4][6] inch) [3] [4] [6] inch width]. Trays shall be one-piece construction having slots spaced not more than 115 mm (4 1/2 inches) 4 1/2 inches on centers.

2.5.5 Solid Bottom-Type Cable Trays

NOTE: Solid bottom or non-ventilated cable tray is a fabricated structure consisting of a bottom without ventilation openings within integral or separate longitudinal side rails.

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760] [915] mm ([6][12][18][24][30][36] inch) [6][12][18][24][30][36] inch width].

Solid covers[ shall][ shall not] be provided.

[2.5.6 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

NOTE: Do not use for Navy projects. Navy does not allow the use of open-top cable supports (J-supports) or closed ring cable supports (D-rings) for telecommunications pathway.

2.6.1 Open Top Cable Supports

Provide open top cable supports in accordance with UL 2043. Open top cable supports shall be[[ galvanized][ zinc-coated] steel][ 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[[ galvanized][ zinc-coated] steel][ as indicated].

]2.7 OUTLET BOXES AND COVERS

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

SECTION 26 20 00 Page 21

2.7.1 Floor Outlet Boxes

Boxes shall be[ adjustable][ nonadjustable] and concrete tight. Each outlet shall consist of[ nonmetallic][ or][ cast-metal] body with threaded openings,[ or sheet-steel body with knockouts] for conduits,[ adjustable ][, ][ brass flange] ring, and cover plate with [19][25][31.75][53.92] mm ([3/4][1][1 1/4][2 1/8] inch) [3/4][1][1 1/4][2 1/8] inch threaded plug.

Telecommunications outlets shall consist of[ surface-mounted, horizontal][ flush], aluminum or stainless steel housing with a receptacle as specified and[ 25 mm (one inch) one inch bushed side opening][ 19 mm (3/4 inch) 3/4 inch top opening]. Receptacle outlets shall consist of[ surface-mounted, horizontal][ flush] aluminum or stainless steel housing with duplex-type receptacle as specified herein. Provide gaskets where necessary to ensure watertight installation.[ Provide plugs with installation instructions to the Contracting Officer for[ 5][ ____] percent of outlet boxes for the capping of outlets upon removal of service fittings.]

2.7.2 Outlet Boxes for Telecommunications System

NOTE: When using "as indicated" option, ensure information required is shown on the drawings.

Choose 100 mm (4 inch) square boxes for single gang, four outlet, copper telecommunications configurations that do not have provision for fiber optic cabling. Choose 120 mm (4 11/16 inch) square boxes for 35 mm (1 1/4 inch) conduit installations and for outlet boxes that have or may require fiber optic cabling. Larger boxes are required to meet bend radii requirements for fiber optic cable.

Provide standard type[ 100 mm square by 54 mm deep (4 inches square by 2 1/8 inches deep)][ 120 mm square by 54 mm deep (4 11/16 inches square by 2 1/8 inches)][ 4 inches square by 2 1/8 inches deep][ 4 11/16 inches square by 2 1/8 inches deep].[ Outlet boxes for wall-mounted telecommunications outlets shall be 100 by 54 by 54 mm (4 by 2 1/8 by 2 1/8 inches) 4 by 2 1/8 by 2 1/8 inches deep.] Depth of boxes shall be large enough to allow manufacturers' recommended conductor bend radii.[ Outlet boxes for fiber optic telecommunication outlets shall include a minimum 10 mm (3/8 inch) 3/8 inch deep single or two gang plaster ring as shown and installed using a minimum 27 mm (1 inch) 1 inch conduit system.][ Outlet boxes for handicapped telecommunications station shall be 100 by 54 by 54 mm (4 by 2 1/8 by 2 1/8 inches) 4 by 2 1/8 by 2 1/8 inches deep.]

[2.7.3 Clock Outlet for Use in Other Than Wired Clock System

NOTE: Battery-operated clocks are Navy standard.

Retain this paragraph only under special conditions.

Provide outlet box with plastic cover, where required, and single receptacle with clock outlet plate. Receptacle shall be recessed sufficiently within box to allow complete insertion of standard cap, flush with plate. Suitable clip or support for hanging clock shall be secured to top plate. Material and finish of plate shall be as specified in paragraph DEVICE PLATES of this section.

SECTION 26 20 00 Page 22

]2.8 CABINETS, JUNCTION BOXES, AND PULL BOXES

Volume greater than 1640 mL 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

NOTE: 1. For Navy projects, unless directed otherwise, do not specify the use of aluminum conductors for interior distribution circuits of 600 VAC or less.

2. The use of aluminum conductors in mission critical facilities, dormitories, officers' housing, and transient living facilities is limited to service entrance conductors only, sizes No. 4 AWG and larger.

NOTE: In overseas locations, for conductors No. 10 AWG and smaller diameter, consideration may be given to the use of stranded wires, if suitable terminal devices can be applied which enable proper connection. Also, stranded wires in sizes No. 10 AWG and smaller diameter may be required for projects involving uninterrupted power supply (UPS) installations.

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 ampacities shown are based on copper, unless indicated otherwise.[ All conductors shall be copper.][ Conductors indicated to be No. 6 AWG or smaller diameter shall be copper. Conductors indicated to be No. 4 AWG and larger diameter shall be either copper or aluminum, unless type of conductor material is specifically indicated, or specified, or required by equipment manufacturer.]

[2.9.1.1 Equipment Manufacturer Requirements

NOTE: Use this paragraph only if aluminum conductors are allowed.

When manufacturer's equipment requires copper conductors at the terminations or requires copper conductors to be provided between components of equipment, provide copper conductors or splices, splice

SECTION 26 20 00 Page 23 boxes, and other work required to satisfy manufacturer's requirements.

]2.9.1.2 Aluminum Conductors

NOTE: In certain instances it may be necessary to require compact stranding, i.e., when outside diameter of cable shall be limited. When necessary, specify the following: "Conductors shall be compact stranded utilizing method of stranding specified in ASTM B 400; however, conductor material shall be as specified herein."

Aluminum conductors shall be AA-8000 series electrical grade aluminum alloy conductors. Type EC/1350 aluminum is not acceptable. Should Contractor choose to provide aluminum for conductors No. 4 AWG and larger diameter, Contractor shall be responsible for increasing conductor size to have same ampacity as copper size indicated; increasing conduit and pull box sizes to accommodate larger size aluminum conductors in accordance with NFPA 70;

ensuring that pulling tension rating of aluminum conductor is sufficient;

providing panelboards[ and motor control centers] that are UL listed for use with aluminum, and so labeled; relocating equipment, modifying equipment terminations, resizing equipment; and resolving problems that are direct results of providing aluminum conductors in lieu of copper.

2.9.1.3 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

(2) Phase B - orange

(3) Phase C - yellow

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

SECTION 26 20 00 Page 24

[d. On three-phase, four-wire delta system, high leg shall be orange, as required by NFPA 70.]

2.9.3 Insulation

NOTE: Be sure conduit fill calculations are based on largest diameter insulation type allowed.

Designer may select other insulation types which may be more suitable for a particular project. For rewiring project where existing conduit is to be utilized, specify types THHN and THWN. Designer should use THWN values (75 degrees C) for ampacities of THWN/THHN.

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[ XHHW][ or][ 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)

NOTE: A Telecommunication Bonding Backbone (TBB) is required between the telecommunications main grounding busbar (TMGB) and all telecommunications grounding busbars (TGBs). A TBB is not required for installation with only a single TGB or TMGB.

Sizing of the TBB TBB length linear m (ft) TBB Size (AWG) less than 4 (13) 6 4 - 6 (14 - 20) 4 6 - 8 (21 - 26) 3 8 - 10 (27 - 33) 2 10 - 13 (34 - 41) 1 13 - 16 (42 - 52) 1/0 16 - 20 (53 - 66) 2/0 greater than 20 (66) 3/0

Choose the second bracketed options where lightning protection system is provided in the job and specified in other sections.

Choose insulated TBB when pathway is a dissimilar metal than copper.

Provide a copper conductor TBB in accordance with TIA J-STD-607-A. The TBB

SECTION 26 20 00 Page 25 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.[ Provide insulated TBB with insulation as specified in the paragraph INSULATION and meeting the fire ratings of its pathway.]

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

NOTE: Type MC cable is UL listed and NFPA 70 recognized for most common building applications.

Review NFPA 70. MC cable does not protect conductors as well as rigid conduit but is more flexible to install and relocate. For Navy projects, designer shall consult with NAVFAC cognizant EFD/EFA electrical design branch manager and obtain written approval before specifying this wiring method.

UL 1569; NFPA 70, Type MC cable.

][2.9.9 Armored Cable

NOTE: Type AC cable has more restricted applications than MC cable but offers the same advantages. Review NFPA 70. For Navy projects, consult with cognizant EFD/EFA electrical design branch manager and obtain written approval before specifying AC cable. Do not use for EFA CHES projects without written approval.

UL 4; NFPA 70, Type AC cable.

][2.9.10 Mineral-Insulated, Metal-Sheathed Cable

NOTE: Type MI cable is used for low temperature, high temperature, hazardous locations, life safety, SECTION 26 20 00 Page 26 and heating applications. Refer to NFPA 70.

Drawings shall clearly show the MI cable. If MI cable utilized in hazardous areas is likely to be subject to high voltage surges, consider the use of surge suppressors in electrical panels serving the load from outside of the hazardous area. Locate suppressors in appropriately rated enclosures within the hazardous area only if there is no other option. MI cable is not available in ratings above 600 volts.

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

][2.9.11 Flat Conductor Cable

NOTE: Type FCC cable has been listed by UL and recognized by NFPA 70 for under carpet tile applications. Review NFPA 70. FCC cable is available off the shelf for power and telecommunications transmission applications.

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

NOTE: Include this paragraph when equipment utilizing cord sets is permanently connected to boxes in lieu of use of plug and receptacles.

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

NOTE: Use last three sentences of paragraph for brig facilities only.

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.[

SECTION 26 20 00 Page 27

Plates on finished walls shall be nylon or lexan, minimum 0.792 mm 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 0.792 mm 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."[ Device plates in areas normally accessible to prisoners shall be brown or ivory finish nylon-device plates rated for high abuse. Test device plates for compliance with UL 514A and UL 514C for physical strength. Attach device plates with spanner head bolts.]

2.12 SWITCHES

2.12.1 Toggle Switches

NOTE: Do not use solderless pressure type toggle switches on Navy projects.

NEMA WD 1, UL 20,[ single pole][, double pole][, three-way][, and four-way], totally enclosed with bodies of thermoplastic or thermoset plastic and mounting strap with grounding screw. Handles shall be[ white][ ivory][ brown] thermoplastic. 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.