Attachment 8 - SECTION 26 20 00 INTERIOR DISTRIBUTION SYSTEM.pdf

USACE / NAVFAC / AFCEC / NASA UFGS- 26 20 00 ( August 2019)

Change 3 - 11/ 21

Pr epar i ng Act i v i t y: NAVFAC Superseding UFGS- 26 20 00 ( Febr uar y 2014)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2022

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

08/ 19, CHG 3: 11/ 21

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

SECTION 26 20 00 Page 1

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

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

2.9.2.1 Ground and Neutral Conductors

2.9.2.2 Ungrounded Conductors

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 Split Duplex Receptacles

2.14.2 Weatherproof Receptacles

2.14.3 Ground-Fault Circuit Interrupter Receptacles

SECTION 26 20 00 Page 2

2.14.4 Special Purpose Receptacles

2.14.5 Plugs

2.14.6 Range Receptacles

2.14.7 Dryer Receptacles

2.14.8 Tamper-Resistant Receptacles

2.14.9 Arc-Fault Circuit Interrupter 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 Ground-Fault Circuit Interrupter

2.15.3.3 Arc-Fault Circuit Interrupters

2.15.4 Fusible Switches for Panelboards

2.15.5 400 Hz Panelboard and Breakers

2.15.6 Branch Circuit Monitoring Panelboards

2.15.7 Lighting Control Panelboards

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 Ground-Fault Circuit Interrupter

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 and Single-Phase 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 Combination Motor Controllers

SECTION 26 20 00 Page 3

2.24.3 Space Heaters

2.25 LOCKOUT REQUIREMENTS

2.26 TELECOMMUNICATIONS SYSTEM

2.27 COMMUNITY ANTENNA TELEVISION (CATV) SYSTEM

2.27.1 CATV Outlets

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 Secondary Bonding 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 Underground Conduit

3.1.6.6 Conduit Interior to Buildings for 400 Hz Circuits

3.1.6.7 Conduit for Circuits Rated Greater Than 600 Volts

3.1.6.8 Conduit Installed Under Floor Slabs

3.1.6.9 Conduit Through Floor Slabs

3.1.6.10 Conduit Installed in Concrete Floor Slabs

3.1.6.11 Stub-Ups

3.1.6.12 Conduit Support

3.1.6.13 Directional Changes in Conduit Runs

3.1.6.14 Locknuts and Bushings

3.1.6.15 Flexible Connections

3.1.6.16 Telecommunications and Signal System Pathway

3.1.6.17 Community Antenna Television (CATV) System Conduits

3.1.7 Busway Installation

3.1.8 Cable Tray Installation

3.1.9 Telecommunications Cable Support Installation

SECTION 26 20 00 Page 4

3.1.10 Boxes, Outlets, and Supports

3.1.10.1 Boxes

3.1.10.2 Pull Boxes

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 Arc-Fault Receptacle Test

3.5.6 Grounding System Test

3.5.7 Watthour Meter

3.5.8 Phase Rotation Test

-- End of Section Table of Contents --

SECTION 26 20 00 Page 5

USACE / NAVFAC / AFCEC / NASA UFGS- 26 20 00 ( August 2019)

Change 3 - 11/ 21

Pr epar i ng Act i v i t y: NAVFAC Superseding UFGS- 26 20 00 ( Febr uar y 2014)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2022

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

08/ 19, CHG 3: 11/ 21

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or t he pr ocur ement , i nst al l at i on, and t est i ng of el ect r i cal wi r i ng syst ems f or const r uct i on pr oj ect s.

Tel ecommuni cat i ons cabl i ng i s cover ed i n Sect i on

27 10 00 BUI LDI NG TELECOMMUNI CATI ONS CABLI NG

SYSTEM. These wi r i ng syst ems pr i mar i l y i nvol ve vol t ages of 1, 000 vol t s and l ess and mai nl y i nvol ve i nt er i or syst ems. When vol t ages gr eat er t han 1, 000 vol t s ar e br ought i nt o a f aci l i t y , consul t and use Section 26 11 16 SECONDARY UNI T SUBSTATI ONS; Sect i on 26 12 21 SI NGLE- PHASE PAD- MOUNTED TRANSFORMERS; and Section 33 71 01 OVERHEAD TRANSMI SSI ON AND DI STRI BUTI ON. Al so consul t Sect i on 33 71 02, UNDERGROUND ELECTRI CAL DI STRI BUTI ON and Sect i on

26 11 14. 00 10 MAI N ELECTRI C SUPPLY STATI ON AND

SUBSTATI ON. Add r equi r ement s f or mat er i al s and pr ocedur es f or speci al or unusual desi gn as necessar y t o f i t speci f i c pr oj ect s.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

SECTION 26 20 00 Page 6

NOTE: Ensur e t he f ol l owi ng i nf or mat i on i s shown on t he pr oj ect dr awi ngs:

1. Locat i on of equi pment

2. Si ngl e- l i ne di agr ams el evat i ons, l i mi t i ng di mensi ons, and equi pment r at i ngs whi ch ar e not cover ed i n t he speci f i cat i ons

3. Remot e i ndi cat i ng or cont r ol r equi r ement s.

PART 1 GENERAL

1.1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

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

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C12.1 (2014; Errata 2016) Electric Meters - Code for Electricity Metering

ASTM INTERNATIONAL (ASTM)

ASTM B1 (2013) Standard Specification for Hard-Drawn Copper Wire

ASTM B8 (2011; R 2017) Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

SECTION 26 20 00 Page 7

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 81 (2012) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

IEEE 100 (2000; Archived) The Authoritative Dictionary of IEEE Standards Terms

IEEE C2 (2017; Errata 1-2 2017; INT 1 2017) National Electrical Safety Code

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2021) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL CONTRACTORS ASSOCIATION (NECA)

NECA NEIS 1 (2015) Standard for Good Workmanship in Electrical Construction

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI C12.7 (2014) Requirements for Watthour Meter Sockets

ANSI C80.1 (2020) American National Standard for Electrical Rigid Steel Conduit (ERSC)

ANSI C80.3 (2020) American National Standard for Electrical Metallic Tubing (EMT)

ANSI C80.5 (2020) American National Standard for Electrical Rigid Aluminum Conduit

NEMA 250 (2020) Enclosures for Electrical Equipment (1000 Volts Maximum)

NEMA BU 1.1 (2010) General Instructions for Proper Handling, Installation, Operation and Maintenance of Busway Rated 600 V or Less

NEMA FU 1 (2012) Low Voltage Cartridge Fuses

NEMA ICS 1 (2000; R 2015) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 2 (2000; R 2020) Industrial Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 3 (2005; R 2010) Medium-Voltage Controllers Rated 2001 to 7200 V AC

NEMA ICS 4 (2015) Application Guideline for Terminal Blocks

SECTION 26 20 00 Page 8

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NEMA KS 1 (2013) Enclosed and Miscellaneous Distribution Equipment Switches (600 V Maximum)

NEMA MG 1 (2018) Motors and Generators

NEMA MG 10 (2017) Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

NEMA MG 11 (1977; R 2012) Energy Management Guide for Selection and Use of Single Phase Motors

NEMA RN 1 (2005; R 2013) Polyvinyl-Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit

NEMA ST 20 (2014) Dry-Type Transformers for General Applications

NEMA TC 2 (2020) Standard for Electrical Polyvinyl Chloride (PVC) Conduit

NEMA TC 3 (2021) Polyvinyl Chloride (PVC) Fittings for Use With Rigid PVC Conduit and Tubing

NEMA TC 14 (2002) Standard for Reinforced Thermosetting Resin Conduit (RTRC) and Fittings

NEMA VE 1 (2017) Metal Cable Tray Systems

NEMA WD 1 (1999; R 2020) Standard for General Color Requirements for Wiring Devices

NEMA WD 6 (2016) Wiring Devices Dimensions Specifications

NEMA Z535.4 (2011; R 2017) Product Safety Signs and Labels

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020; TIA

20-1; TIA 20-2; TIA 20-3; TIA 20-4)

National Electrical Code

NFPA 70E (2021) Standard for Electrical Safety in the Workplace

NFPA 780 (2020) Standard for the Installation of Lightning Protection Systems

SECTION 26 20 00 Page 9

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

TIA-568.1 (2020e) Commercial Building Telecommunications Infrastructure Standard

TIA-569 (2019e) Telecommunications Pathways and Spaces

TIA-607 (2019d) Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises

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

10 CFR 431 Energy Efficiency Program for Certain Commercial and Industrial Equipment

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

29 CFR 1910.303 Electrical, General

UNDERWRITERS LABORATORIES (UL)

UL 1 (2005; Reprint Jan 2020) UL Standard for Safety Flexible Metal Conduit

UL 4 (2004; Reprint Mar 2021) UL Standard for Safety Armored Cable

UL 5 (2016; Reprint Aug 2020) UL Standard for Safety Surface Metal Raceways and Fittings

UL 5A (2015; Reprint Aug 2020) Nonmetallic Surface Raceways and Fittings

UL 6 (2007; Reprint Sep 2019) UL Standard for Safety Electrical Rigid Metal Conduit-Steel

UL 6A (2008; Reprint Mar 2021) UL Standard for Safety Electrical Rigid Metal Conduit - Aluminum, Red Brass, and Stainless Steel

UL 20 (2018; Reprint Jan 2021) UL Standard for Safety General-Use Snap Switches

UL 44 (2018; Reprint May 2021) UL Standard for Safety Thermoset-Insulated Wires and Cables

UL 50 (2015) UL Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations

UL 67 (2018; Reprint Jul 2020) UL Standard for Safety Panelboards

UL 83 (2017; Reprint Mar 2020) UL Standard for Safety Thermoplastic-Insulated Wires and Cables

SECTION 26 20 00 Page 10

UL 248-4 (2010; Reprint Apr 2019) Low-Voltage Fuses

- Part 4: Class CC Fuses

UL 248-8 (2011; Reprint Aug 2020) Low-Voltage Fuses

- Part 8: Class J Fuses

UL 248-10 (2011; Reprint Aug 2020) Low-Voltage Fuses

- Part 10: Class L Fuses

UL 248-12 (2011; Reprint Aug 2020) Low Voltage Fuses

- Part 12: Class R Fuses

UL 248-15 (2018) Low-Voltage Fuses - Part 15: Class T Fuses

UL 360 (2013; Reprint Aug 2021) UL Standard for Safety Liquid-Tight Flexible Metal Conduit

UL 467 (2013; Reprint Jun 2017) UL Standard for Safety Grounding and Bonding Equipment

UL 486A-486B (2018; Reprint May 2021) UL Standard for Safety Wire Connectors

UL 486C (2018; Reprint May 2021) UL Standard for Safety Splicing Wire Connectors

UL 489 (2016; Rev 2019) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 498 (2017; Reprint Sep 2021) UL Standard for Safety Attachment Plugs and Receptacles

UL 506 (2017) UL Standard for Safety Specialty Transformers

UL 508 (2018; Reprint Jul 2021) UL Standard for Safety Industrial Control Equipment

UL 510 (2020) UL Standard for Safety Polyvinyl Chloride, Polyethylene and Rubber Insulating Tape

UL 514A (2013; Reprint Aug 2017) UL Standard for Safety Metallic Outlet Boxes

UL 514B (2012; Reprint May 2020) Conduit, Tubing and Cable Fittings

UL 514C (2014; Reprint Feb 2020) UL Standard for Safety Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers

UL 651 (2011; Reprint Mar 2020) UL Standard for Safety Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings

SECTION 26 20 00 Page 11

UL 674 (2011; Reprint Dec 2020) UL Standard for Safety Electric Motors and Generators for Use in Hazardous (Classified) Locations

UL 719 (2015; Reprint Jul 2021) UL Standard for Safety Nonmetallic-Sheathed Cables

UL 797 (2007; Reprint Mar 2021) UL Standard for Safety Electrical Metallic Tubing -- Steel

UL 817 (2015; Reprint Sep 2021) UL Standard for Safety Cord Sets and Power-Supply Cords

UL 845 (2021) UL Standard for Safety Motor Control Centers

UL 854 (2020) Standard for Service-Entrance Cables

UL 857 (2009; Reprint Apr 2021) UL Standard for Safety Busways

UL 869A (2006; Reprint Jun 2020) Reference Standard for Service Equipment

UL 870 (2016; Reprint Mar 2019) UL Standard for Safety Wireways, Auxiliary Gutters, and Associated Fittings

UL 943 (2016; Reprint Feb 2018) UL Standard for Safety Ground-Fault Circuit-Interrupters

UL 984 (1996; Reprint Sep 2005) Hermetic Refrigerant Motor-Compressors

UL 1063 (2017) UL Standard for Safety Machine-Tool Wires and Cables

UL 1203 (2013; Reprint Mar 2021) UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations

UL 1242 (2006; Reprint Aug 2020) Standard for Electrical Intermediate Metal Conduit -- Steel

UL 1283 (2017) UL Standard for Safety Electromagnetic Interference Filters

UL 1449 (2021) UL Standard for Safety Surge Protective Devices

UL 1561 (2011; Reprint Jun 2015) Dry-Type General Purpose and Power Transformers

UL 1569 (2018) UL Standard for Safety Metal-Clad Cables

UL 1660 (2019) Liquid-Tight Flexible Nonmetallic

SECTION 26 20 00 Page 12

Conduit

UL 1699 (2017; Reprint Nov 2020) UL Standard for Safety Arc-Fault Circuit-Interrupters

UL 2043 (2013) Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces

UL 4248-1 (2017) UL Standard for Safety Fuseholders

- Part 1: General Requirements

UL 4248-12 (2018) UL Standard for Safety Fuseholders

- Part 12: Class R

1.2 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, are as defined in

IEEE 100 .

1.3 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t , and cor r espondi ng submi t t al i t ems i n t he t ext , t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect . The Gui de Speci f i cat i on t echni cal edi t or s have cl assi f i ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a " G" t o an i t em i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For Ar my pr oj ect s, f i l l i n t he empt y br acket s f ol l owi ng t he " G" c l assi f i cat i on, wi t h a code of up t o t hr ee char act er s t o i ndi cat e t he appr ovi ng aut hor i t y. Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

The " S" c l assi f i cat i on i ndi cat es submi t t al s r equi r ed as pr oof of compl i ance f or sust ai nabi l i t y Gui di ng Pr i nci pl es Val i dat i on or Thi r d Par t y Cer t i f i cat i on and as descr i bed i n Sect i on 01 33 00 SUBMI TTAL

PROCEDURES.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce, and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

SECTION 26 20 00 Page 13

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are [for Contractor Quality Control approval.][for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.] Submit the following 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[, [_____]]

Wireways ; G[, [_____]]

[ Load Centers for Housing Units ; G[, [_____]]

] Marking Strips Drawings; G[, [_____]]

SD-03 Product Data

Receptacles ; G[, [_____]]

Circuit Breakers ; G[, [_____]]

Switches ; G[, [_____]]

Transformers ; G[, [_____]]

Enclosed Circuit Breakers ; G[, [_____]]

Motor Controllers ; G[, [_____]]

[ Combination Motor Controllers ; G[, [_____]]

][ Load Centers for Housing Units ; G[, [_____]]

] Manual Motor Starters ; G[, [_____]]

[ Residential Load Centers ; G[, [_____]]

][ Metering ; G[, [_____]]

][ Meter Base Only ; G[, [_____]]

] CATV Outlets ; G[, [_____]]

Secondary Bonding Busbar ; G[, [_____]]

Surge Protective Devices ; G[, [_____]]

SECTION 26 20 00 Page 14

Cable Trays ; G[, [_____]]

[ SD-05 Design Data

Cable Tray Design ; G[, [_____]]

] SD-06 Test Reports

600-volt Wiring Test ; G[, [_____]]

Grounding System Test ; G[, [_____]]

Transformer Tests ; G[, [_____]]

Ground-fault Receptacle Test ; G[, [_____]]

Arc-fault Receptacle Test ; G[, [_____]]

SD-07 Certificates

Fuses ; G[, [_____]]

SD-09 Manufacturer's Field Reports

Transformer Factory Tests

[ SD-10 Operation and Maintenance Data

NOTE: Coor di nat e wi t h opt i ons under par agr aphs MAI NTENANCE" and METERI NG.

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

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

]] 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, "must" 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. Provide equipment, materials, installation, and workmanship in accordance with NFPA 70 unless more stringent requirements are specified or indicated. NECA NEIS 1 shall be considered the minimum standard for workmanship.

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 and:

SECTION 26 20 00 Page 15

a. Have been in satisfactory commercial or industrial use for 2 years prior to bid opening including applications of equipment and materials under similar circumstances and of similar size.

b. Have been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period.

c. Where two or more items of the same class of equipment are required, provide 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 are not acceptable.

1.5 MAINTENANCE

NOTE: Sel ect t he opt i on bel ow onl y i f t he syst em i s consi der ed compl ex and t her e i s a need f or det ai l ed syst em i nf or mat i on.

[ 1.5.1 Electrical Systems

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

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

Provide equipment items supported by service organizations that 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

SECTION 26 20 00 Page 16

NOTE: Do not use t hi s par agr aph f or Navy pr oj ect s.

When di r ect ed t o meet sei smi c r equi r ement s, edi t Sections 13 48 73 SEI SMI C CONTROL FOR MECHANI CAL EQUI PMENT and 26 05 48. 00 10 SEI SMI C PROTECTI ON FOR ELECTRI CAL EQUI PMENT t o sui t t he pr oj ect and i ncl ude i n t he cont r act document s. Edi t t he f ol l owi ng par agr aph and i ncl ude i t i n t he pr oj ect speci f i cat i on. When a Gover nment desi gner i s t he Engi neer of Recor d, pr ovi de sei smi c r equi r ement s on t he dr awi ngs.

Provide seismic details[ conforming to[ Section 13 48 73 SEISMIC CONTROL FOR MECHANICAL EQUIPMENT][ and to][ Section 26 05 48.00 10 SEISMIC PROTECTION FOR ELECTRICAL EQUIPMENT]][ as indicated].

] PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

As a minimum, meet requirements of UL, where UL standards are established for those items, and requirements of NFPA 70 for all materials, equipment, and devices.

2.2 CONDUIT AND FITTINGS

NOTE: The Uses Per mi t t ed ar e as modi f i ed by UFC 3- 520- 01 ( See Tabl e 3- 1) , " I nt er i or El ect r i cal Syst ems. " The Uses Not Per mi t t ed ar e as speci f i ed i n NFPA 70 and when r est r i ct ed by ot her UFCs f or speci f i c t ypes of bui l di ngs, such as medi cal f aci l i t i es. Do not use f l exi bl e met al condui t i n damp and wet l ocat i ons and f or pumps. Do not use El ect r i cal Nonmet al l i c Tubi ng ( ENT) .

Use mal l eabl e i r on seal el ect r i cal f i t t i ngs i n f uel val ve pi t s and si mi l ar l ocat i ons wher e f i t t i ngs ar e exposed t o pot ent i al f r eeze t haw envi r onment s.

Nonmet al l i c f i t t i ngs have f ai l ed i n t hese environments.

Conform to the following:

2.2.1 Rigid Metallic Conduit

2.2.1.1 Rigid, Threaded Zinc-Coated Steel Conduit

ANSI C80.1 , UL 6 .

2.2.1.2 Rigid Aluminum Conduit

ANSI 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].

SECTION 26 20 00 Page 17

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 , ANSI C80.3 .

2.2.5 Plastic-Coated Rigid Steel and IMC Conduit

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

2.2.6 Flexible Metal Conduit

UL 1 , limited to 1829 mm 6 feet .

2.2.6.1 Liquid-Tight Flexible Metal Conduit, Steel

UL 360 , limited to 1829 mm 6 feet .

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

UL 514B . Ferrous fittings: 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: Moi st ur e absor bed wi t hi n di e- cast f i t t i ngs may cause t hem t o det er i or at e mor e r api dl y t han st eel f i t t i ngs. Ut i l i ze st eel f i t t i ngs i n damp or wet l ocat i ons, or when r equest ed by Act i v i t y on I nst al l at i ons and Bases t hat have hi gh ambi ent humi di t y envi r onment s.

[Die Cast][Steel] compression type.

2.2.8 Fittings for Rigid Nonmetallic Conduit

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 l i qui d- t i ght f l exi bl e nonmet al l i c condui t s i n Cont i nent al Uni t ed St at es ( CONUS) . I n over seas l ocat i ons, onl y use when speci f i cal l y al l owed by t he Aut hor i t y Havi ng Jur i sdi ct i on.

UL 1660 .

SECTION 26 20 00 Page 18

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

NOTE: UFC 3- 520- 01 aut hor i zes t he use of sur f ace met al r aceway onl y f or bui l di ng i mpr ovement s, r enovat i ons or f or appl i cat i ons wher e a var i et y of cor d- and- pl ug connect ed equi pment wi l l be ut i l i zed i n a l i mi t ed space, such as i n some ar eas of medi cal f aci l i t i es, shops, and l abor at or i es. Aut hor i zed f or use on acoust i c- r at ed wal l s t o l i mi t t he number of penet r at i ons and mai nt ai n acoust i cal i nt egr i t y.

Typi cal appl i cat i ons i ncl ude spaces such as Sensi t i ve Compar t ment ed I nf or mat i on Faci l i t i es ( SCI F) and Speci al Access Pr ogr am Faci l i t i es ( SAPF) .

UL 5 , two-piece painted steel, totally enclosed, snap-cover type.[ Provide multiple outlet-type raceway with grounding-type receptacle where indicated. Provide receptacles as specified herein, spaced a minimum of one every [455] [_____] mm [18] [_____] inches .][ Wire alternate receptacles on different circuits.]

2.3.2 Surface Nonmetallic Raceway

NOTE: The UFC 3- 520- 01 def i ni t i on of " subj ect t o physi cal damage" pr ohi bi t s t he use of nonmet al l i c wi r eways f or ext er i or appl i cat i ons i nst al l ed l ess than 2. 4 met er s 8 f eet above f i ni shed gr ade or 2. 4 meters 8 f eet above f l oor el evat i on f or r aceways on el evat ed pl at f or ms, l oadi ng docks, or st ai r wel l s.

Coor di nat e wi t h t he Aut hor i t y Havi ng Jur i sdi ct i on r esponsi bl e f or t he const r uct i on cont r act r egar di ng t he use of t hi s wi r i ng met hod i n t he pr oj ect .

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

Provide receptacles as specified herein, spaced a minimum of one every [455] [_____] mm [18] [_____] inches .][ Wire alternate receptacles on different circuits.]

2.4 BUSWAY

NOTE: Ensur e phase sequence of vol t ages and or i ent at i on ar e i ndi cat ed on t he dr awi ngs f or exi st i ng t r ansf or mer s, swi t chboar ds, swi t chgear , and mot or cont r ol cent er s.

NEMA BU 1.1 , UL 857 . Provide the following:

a. Buses: [ copper][ or ][ aluminum].

b. Busways: rated [_____] volts, [_____] continuous current amperes, three-phase,[ three-][ four-]wire, and include integral or internal[

SECTION 26 20 00 Page 19

50-percent] ground bus.

c. Short circuit rating: [ [_____] root mean square (rms) symmetrical amperes minimum][ as indicated].

[ d. Busway systems: suitable for use indoors.

] e. Enclosures: [ steel] [ aluminum] [ metallic].

f. Hardware: plated or otherwise protected to resist corrosion.

g. Joints: one-bolt type with through-bolts, which can be checked for tightness without de-energizing system.

h. Maximum hot spot temperature rise at any point in busway at continuous rated load: do not exceed 55 degrees C above maximum ambient temperature of 40 degrees C in any position.

i. Internal barriers to prevent movement of superheated gases.

j. 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 must be unventilated,][ unventilated, totally enclosed] low-impedance busway. Provide bus bars fully covered with insulating material, except at stabs. Provide an entirely polarized busway system.

2.4.2 Plug-In Busways

Unventilated type. Provide the following:

a. Plug-in units: [ fusible, handle-operated, switch type, horsepower-rated][ circuit breaker-type][ handle-operated, switch type, equipped with high interrupting-capacity, current-limiting fuses].

b. Bus bars: covered with insulating material throughout, except at joints and other connection points.

[ c. A hook stick of suitable length for operating plug-in units from the floor.

] 2.5 CABLE TRAYS

NOTE: I ndi cat e cabl e t r ay l ayout on t he dr awi ngs.

When mul t i pl e t ypes and si zes ar e used, i ndi cat e s i ze and t ype of cabl e t r ays on t he dr awi ngs. When usi ng " as i ndi cat ed" opt i on, ensur e i nf or mat i on r equi r ed i s shown on t he dr awi ngs.

NEMA VE 1. Provide the following:

[ Submit cable tray design , including dimensional layout, load and seismic

SECTION 26 20 00 Page 20 calculations, and fill calculations. Dimensional layout includes cable spacings, cable tray splices, and supports. Fill calculations include an index of cables for each section and identification of the lb/ft, cross sectional area, and insulation voltage class for each cable.

] a. Cable trays: form a wireway system, with a nominal[ [75] [100] [150] mm [3] [4] [6] inch ] depth[ as indicated].

b. Cable trays: constructed of[ aluminum][ copper-free aluminum][ steel that has been zinc-coated after fabrication].

c. Cable trays: include splice and end plates, dropouts, and miscellaneous hardware.

d. Edges, fittings, and hardware: finished free from burrs and sharp edges.

e. Fittings: ensure not less than load-carrying ability of straight tray sections and have manufacturer's minimum standard radius.

f. Radius of bends: [ [305] [610] [915] mm [12] [24] [36] inches .][ as indicated.]

2.5.1 Basket-Type Cable Trays

NOTE: Basket cabl e t r ay i s a f abr i cat ed st r uct ur e consi st i ng of wi r e mesh bot t om and si de r ai l s.

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

2.5.2 Trough-Type Cable Trays

NOTE: Tr ough or vent i l at ed cabl e t r ay i s a f abr i cat ed st r uct ur e consi st i ng of i nt egr al or separ at e l ongi t udi nal r ai l s and a bot t om havi ng openi ngs suf f i c i ent f or t he passage of ai r and ut i l i z i ng 75 per cent or l ess of t he pl an ar ea of t he sur f ace t o suppor t cabl es.

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760] [915] mm [6] [12] [18] [24] [30] [36] inch width].[ Cable tray must be suitable for use as an equipment grounding conductor.]

2.5.3 Ladder-Type Cable Trays

NOTE: Ladder cabl e t r ay i s a f abr i cat ed st r uct ur e consi st i ng of t wo l ongi t udi nal s i de r ai l s connect ed by i ndi v i dual t r ansver se member s ( r ungs) .

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760]

SECTION 26 20 00 Page 21

[915] mm [6] [12] [18] [24] [30] [36] inch width] with maximum rung spacing of [150] [225] [305] [455] mm [6] [9] [12] [18] inches .[ Cable tray must be suitable for use as an equipment grounding conductor.]

2.5.4 Channel-Type Cable Trays

NOTE: Channel cabl e t r ay i s a f abr i cat ed st r uct ur e consi st i ng of a one- pi ece vent i l at ed- bot t om or sol i d- bot t om channel sect i on, not exceedi ng 152 mm 6 inches i n wi dt h.

Provide[ size as indicated][ of nominal [75] [100] [150] mm [3] [4] [6] inch width]. Provide trays with one-piece construction having slots spaced not more than 115 mm 4 1/2 inches on centers.[ Cable tray must be suitable for use as an equipment grounding conductor.]

2.5.5 Solid Bottom-Type Cable Trays

NOTE: Sol i d bot t om or non- vent i l at ed cabl e t r ay i s a f abr i cat ed st r uct ur e consi st i ng of a bot t om wi t hout vent i l at i on openi ngs wi t hi n i nt egr al or separ at e l ongi t udi nal s i de r ai l s.

Provide[ size as indicated][ of nominal [150] [305] [455] [610] [760] [915] mm [6][12][18][24][30][36] inch width].[ Provide solid covers.][ Do not provide solid covers.]

[ 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: Ut i l i ze open t el ecommuni cat i ons cabl e suppor t s ( J- Hooks / J- Suppor t s / D- r i ngs) onl y as speci f i cal l y per mi t t ed i n UFC 3- 580- 01, Tel ecommuni cat i ons, Bui l di ng Cabl i ng Syst em.

2.6.1 Open Top Cable Supports

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

2.6.2 Closed Ring Cable Supports

Provide closed ring cable supports in accordance with UL 2043 . Provide[[ galvanized][ zinc-coated][ stainless] steel] closed ring cable supports[ as indicated].

SECTION 26 20 00 Page 22

] 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

Provide the following:

a. Boxes: [ adjustable][ nonadjustable] and concrete tight.

b. Each outlet: consisting 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 threaded plug.

c. Telecommunications outlets: consisting of[ surface-mounted, horizontal][ flush], aluminum or stainless steel housing with a receptacle as specified and[ 25 mm one inch bushed side opening][ 19 mm 3/4 inch top opening].

d. Receptacle outlets: consisting of[ surface-mounted, horizontal][ flush] aluminum or stainless steel housing with duplex-type receptacle as specified herein.

e. Provide gaskets where necessary to ensure watertight installation.

[ f. 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 usi ng " as i ndi cat ed" opt i on, ensur e i nf or mat i on r equi r ed i s shown on t he dr awi ngs.

Choose 100 mm 4 i nch squar e boxes f or s i ngl e gang, f our out l et , copper t el ecommuni cat i ons conf i gur at i ons t hat do not have pr ovi s i on f or f i ber opt i c cabl i ng. Choose 120 mm 4 11/ 16 i nch squar e boxes f or 35 mm 1 1/ 4 i nch condui t i nst al l at i ons and f or out l et boxes t hat have or may r equi r e f i ber opt i c cabl i ng. Lar ger boxes ar e r equi r ed t o meet bend r adi i r equi r ement s f or f i ber opt i c cabl e.

Provide the following:

a. Standard type [ 100 mm square by 54 mm deep][ 120 mm square by 54 mm deep] [ 4 inches square by 2 1/8 inches deep][ 4 11/16 inches square by 2 1/8 inches deep] .

[ b. Outlet boxes for wall-mounted telecommunications outlets: 100 by 54 by 54 mm 4 by 2 1/8 by 2 1/8 inches deep.

] c. Depth of boxes: large enough to allow manufacturers' recommended conductor bend radii.

[ d. Outlet boxes for fiber optic telecommunication outlets: include a

SECTION 26 20 00 Page 23 minimum 10 mm 3/8 inch deep single or two gang plaster ring as shown and installed using a minimum 27 mm one inch conduit system.

][ e. Outlet boxes for handicapped telecommunications station: 100 by 54 by 54 mm 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: Bat t er y- oper at ed cl ocks ar e Navy st andar d.

Ret ai n t hi s par agr aph onl y under speci al condi t i ons.

Provide the following:

a. Outlet box with plastic cover, where required, and single receptacle with clock outlet plate.

b. Receptacle: recessed sufficiently within box to allow complete insertion of standard cap, flush with plate.

c. Suitable clip or support for hanging clock: secured to top plate.

d. Material and finish of plate: as specified in paragraph DEVICE PLATES of this section.

] 2.8 CABINETS, JUNCTION BOXES, AND PULL BOXES

UL 50 ; volume greater than 1640 mL 100 cubic inches , NEMA Type 1 enclosure; sheet steel, hot-dip, zinc-coated. Where exposed to wet, damp, or corrosive environments, NEMA Type [3R][4X][_____][as indicated].

2.9 WIRES AND CABLES

Provide wires and cables in accordance applicable requirements of NFPA 70 and UL for type of insulation, jacket, and conductor specified or indicated. Do not use wires and cables manufactured more than 12 months prior to date of delivery to site.

2.9.1 Conductors

NOTE: UFC 3- 520- 01 al l ows t he use of al umi num conduct or s of equi val ent ampaci t y i nst ead of copper f or #4 AWG and l ar ger s i zes. I f onl y copper i s desi r ed f or t hese appl i cat i ons, sel ect t he br acket ed opt i on bel ow. The second br acket ed opt i on f ol l ows t he UFC gui dance.

NOTE: I n over seas l ocat i ons, f or conduct or s No. 10 AWG and smal l er di amet er , gi ve consi der at i on t o t he use of st r anded wi r es, i f sui t abl e t er mi nal devi ces can be appl i ed whi ch enabl e pr oper connect i on.

Al so, st r anded wi r es i n s i zes No. 10 AWG and smal l er di amet er may be r equi r ed f or pr oj ect s i nvol v i ng uni nt er r upt ed power suppl y ( UPS) i nst al l at i ons.

SECTION 26 20 00 Page 24

Provide the following:

a. Conductor sizes and capacities shown are based on copper, unless indicated otherwise.

b. Conductors No. 8 AWG and larger diameter: stranded.

c. Conductors No. 10 AWG and smaller diameter: solid.

d. Conductors for remote control, alarm, and signal circuits, classes 1, 2, and 3: stranded unless specifically indicated otherwise.

e. [All conductors: copper.][Conductors indicated to be No. 6 AWG or smaller diameter: copper. Conductors indicated to be No. 4 AWG and larger diameter: 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 t hi s par agr aph onl y i f al umi num conduct or s ar e al l owed.

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 boxes, and other work required to satisfy manufacturer's requirements.

][ 2.9.1.2 Aluminum Conductors

NOTE: I n cer t ai n i nst ances i t may be necessar y t o r equi r e compact st r andi ng, i . e. , when out si de di amet er of cabl e must be l i mi t ed. When necessar y, speci f y t he f ol l owi ng: " Pr ovi de conduct or s wi t h compact st r anded ut i l i z i ng met hod of st r andi ng speci f i ed i n ASTM B400/ B400M; however , pr ovi de conduct or mat er i al as speci f i ed her ei n. "

Provide aluminum conductors of AA-8000 series electrical grade aluminum alloy conductors. Type EC/1350 aluminum is not acceptable. If Contractor chooses to provide aluminum for conductors No. 4 AWG and larger diameter, Contractor is 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

Provide minimum conductor size in accordance with the following:

SECTION 26 20 00 Page 25

a. Branch circuits: No. 12 AWG.

b. Class 1 remote-control and signal circuits: No. 14 AWG.

c. Class 2 low-energy, remote-control and signal circuits: No. 16 AWG.

d. Class 3 low-energy, remote-control, alarm and signal circuits: No. 22

AWG.

e. Digital low voltage lighting control (DLVLC) system at 24 Volts or less: Category [5 UTP][_____] cables[ in EMT conduit][ in accordance with DLVLC system manufacturer requirements].

2.9.2 Color Coding

Provide color coding for service, feeder, branch, control, and signaling circuit conductors.

2.9.2.1 Ground and Neutral Conductors

Provide color coding of ground and neutral conductors as follows:

a. Grounding conductors: Green.

b. Neutral conductors: White.

c. Exception, where neutrals of more than one system are installed in same raceway or box, other neutrals color coding: white with a different colored (not green) stripe for each.

2.9.2.2 Ungrounded Conductors

Provide color coding of ungrounded conductors in different voltage systems 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

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

] 2.9.3 Insulation

SECTION 26 20 00 Page 26

NOTE: Be sur e condui t f i l l cal cul at i ons ar e based on l ar gest di amet er i nsul at i on t ype al l owed.

Desi gner may sel ect ot her i nsul at i on t ypes whi ch may be mor e sui t abl e f or a par t i cul ar pr oj ect . For r ewi r i ng pr oj ect wher e exi st i ng condui t i s t o be ut i l i zed, speci f y t ypes THHN and THWN.

Conduct or s must be si zed f or ampaci t y at 60 degr ees C or 75 degr ees C as r equi r ed i n accor dance wi t h Sect i on 110. 14 of NFPA 70 f or t he l owest t er mi nat i on val ue i n t he c i r cui t ; however , ambi ent t emper at ur e cor r ect i on may be based on t he act ual conduct or i nsul at i on t emper at ur e r at i ng per NFPA 70 Sect i on

110. 14. Thi s r equi r ement al so appl i es t o f eeder s pr ot ect ed by 100 per cent r at ed ci r cui t br eaker s.

Unless specified or indicated otherwise or required by NFPA 70 , provide power and lighting wires rated for 600-volts,[ 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: Type TW or TF, conforming to UL 83 . Where equipment or devices require 90-degree Centigrade (C) conductors, provide only conductors with 90-degree C insulation or better.

2.9.4 Bonding Conductors

ASTM B1, solid bare copper wire for sizes No. 8 AWG and smaller diameter;

ASTM B8, Class B, stranded bare copper wire for sizes No. 6 AWG and larger diameter.

2.9.4.1 Telecommunications Bonding Backbone (TBB)

NOTE: A Tel ecommuni cat i on Bondi ng Backbone ( TBB) i s r equi r ed bet ween t he Pr i mar y Bondi ng Busbar ( PBB) and al l Secondar y Bondi ng Busbar s ( SBBs) . A TBB i s not r equi r ed f or i nst al l at i on wi t h onl y a s i ngl e SBB or PBB.

Si zi ng of t he TBB

TBB l engt h l i near m f t TBB Si ze ( AWG) l ess t han 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

SECTION 26 20 00 Page 27

16 - 20 53 - 66 2/0 gr eat er t han 20 66 3/0

Choose t he second br acket ed opt i ons wher e l i ght ni ng pr ot ect i on syst em i s pr ovi ded i n t he j ob and speci f i ed i n ot her sect i ons.

Choose i nsul at ed TBB when pat hway i s a di ssi mi l ar met al t han copper . See TI A- 607- D Sect i on 6. 3. 1 t hr ough 6. 3. 6 f or f ur t her i nf or mat i on.

Provide a copper conductor TBB in accordance with TIA-607 with No. 6 AWG minimum size, and sized at 2 kcmil per linear foot of conductor length up to a maximum size of 750 kcmil.[ 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 (PBB) and the electrical service ground in accordance with TIA-607 . Size the bonding conductor for telecommunications 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…