AM4_Specifications_30_Jul_18.pdf

UD 2.4 - Package 3, Jordan 463243DORMITORY

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 00 00.00 20

BASIC ELECTRICAL MATERIALS AND METHODS Revised by Amendment 0004

07/06

PART 1 GENERAL

1.1 REFERENCES

1.2 RELATED REQUIREMENTS

1.3 DEFINITIONS

1.4 ELECTRICAL CHARACTERISTICS

1.5 ADDITIONAL SUBMITTALS INFORMATION

1.5.1 Shop Drawings (SD-02)

1.5.2 Product Data (SD-03)

1.6 QUALITY ASSURANCE

1.6.1 Regulatory Requirements

1.6.2 Standard Products

1.6.2.1 Alternative Qualifications

1.6.2.2 Material and Equipment Manufacturing Date

1.7 WARRANTY

1.8 POSTED OPERATING INSTRUCTIONS

1.9 MANUFACTURER'S NAMEPLATE

1.10 FIELD FABRICATED NAMEPLATES

1.11 WARNING SIGNS

1.12 ELECTRICAL REQUIREMENTS

1.13 INSTRUCTION TO GOVERNMENT PERSONNEL

PART 2 PRODUCTS

2.1 FACTORY APPLIED FINISH

PART 3 EXECUTION

3.1 FIELD APPLIED PAINTING

3.2 FIELD FABRICATED NAMEPLATE MOUNTING

3.3 WARNING SIGN MOUNTING

-- End of Section Table of Contents --

SECTION 26 00 00.00 20 Page 1 W912ER18R0007 Amendment 0004

SECTION 26 00 00.00 20

BASIC ELECTRICAL MATERIALS AND METHODS

Revised by Amendment 0004

07/06

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM D709 (2016) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

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

IEEE C2 (2017) National Electrical Safety Code

IEEE C57.12.28 (2014) Standard for Pad-Mounted Equipment

- Enclosure Integrity

IEEE C57.12.29 (2014) Standard for Pad-Mounted Equipment

- Enclosure Integrity for Coastal Environments

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2014) Enclosures for Electrical Equipment (1000 Volts Maximum)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017) National Electrical Code

1.2 RELATED REQUIREMENTS

This section applies to all sections of Division 26 and 33, ELECTRICAL and UTILITIES, of this project specification unless specified otherwise in the individual sections. This section has been incorporated into, and thus, does not apply to, and is not referenced in the following sections.

Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM Section 27 10 00 BUILDING TELECOMMUNICATIONS CABLING SYSTEM Section 33 82 00 TELECOMMUNICATIONS OUTSIDE PLANT (OSP)

All electrical equipment and material shall be in compliance with either IEC (International Electrotechnical Commission), UL, BS (Britsh Standards), DIN (German Standards) or CE (Conformité Européene Standards), and shall be designed and tested to operate at 380/220V, 3 phase, 4 wire, SECTION 26 00 00.00 20 Page 2

50 Hz secondary and 11 kV, 3 phase, 50 Hz primary voltages. All electrical equipment shall be in compliance with either UL, BS (Britsh Standards), DIN (German Standards) or CE (Conformité Européene Standards)

1.3 DEFINITIONS

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

b. The technical sections referred to herein are those specification sections that describe products, installation procedures, and equipment operations and that refer to this section for detailed description of submittal types.

c. The technical paragraphs referred to herein are those paragraphs in PART 2 - PRODUCTS and PART 3 - EXECUTION of the technical sections that describe products, systems, installation procedures, equipment, and test methods.

1.4 ELECTRICAL CHARACTERISTICS

Electrical characteristics for this project shall be 11 kV primary, three phase, three wire, 50 Hz, and 380/220 volts secondary, three phase, four wire, 50 Hz. Final connections to the power distribution system at the transformer shall be made by the Contractor.

1.5 ADDITIONAL SUBMITTALS INFORMATION

Submittals required in other sections that refer to this section must conform to the following additional requirements as applicable.

1.5.1 Shop Drawings (SD-02)

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.

1.5.2 Product Data (SD-03)

Submittal shall include performance and characteristic curves.

1.6 QUALITY ASSURANCE

1.6.1 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.

SECTION 26 00 00.00 20 Page 3

1.6.2 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 the technical section.

1.6.2.1 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.

1.6.2.2 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.

1.7 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.

1.8 POSTED OPERATING INSTRUCTIONS

Provide for each system and principal item of equipment as specified in the technical sections for use by operation and maintenance personnel.

The operating instructions shall include the following:

a. Wiring diagrams, control diagrams, and control sequence for each principal system and item of equipment.

b. Start up, proper adjustment, operating, lubrication, and shutdown procedures.

c. Safety precautions.

d. The procedure in the event of equipment failure.

e. Other items of instruction as recommended by the manufacturer of each system or item of equipment.

Print or engrave operating instructions and frame under glass or in approved laminated plastic. Post instructions where directed. For operating instructions exposed to the weather, provide weather-resistant materials or weatherproof enclosures. Operating instructions shall not fade when exposed to sunlight and shall be secured to prevent easy removal

SECTION 26 00 00.00 20 Page 4 or peeling.

1.9 MANUFACTURER'S NAMEPLATE

Each item of equipment shall have a nameplate bearing the manufacturer's name, address, model number, and serial number securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable.

1.10 FIELD FABRICATED NAMEPLATES

ASTM D709. Provide laminated plastic nameplates for each equipment enclosure, relay, switch, and device; as specified in the technical sections or as indicated on the drawings. Each nameplate inscription shall identify the function and, when applicable, the position.

Nameplates shall be melamine plastic, 3 mm thick, white with black center core. Surface shall be matte finish. Corners shall be square.

Accurately align lettering and engrave into the core. Minimum size of nameplates shall be 25 by 65 mm. Lettering shall be a minimum of 6.35 mm high normal block style.

1.11 WARNING SIGNS

Provide warning signs for the enclosures of electrical equipment including substations, pad-mounted transformers, pad-mounted switches, generators, and switchgear having a nominal rating exceeding 600 volts.

a. When the enclosure integrity of such equipment is specified to be in accordance with IEEE C57.12.28 or IEEE C57.12.29 , such as for pad-mounted transformers and pad-mounted SF6 switches, provide self-adhesive warning signs on the outside of the high voltage compartment door(s). Sign shall be a decal and shall have nominal dimensions of 178 by 255 mm with the legend "DANGER HIGH VOLTAGE" printed in two lines of nominal 50 mm high letters. The word "DANGER" shall be in white letters on a red background and the words "HIGH VOLTAGE" shall be in black letters on a white background. Decal shall be Panduit No. PPSO710D72 or approved equal.

b. When such equipment is guarded by a fence, mount signs on the fence.

Provide metal signs having nominal dimensions of 355 by 255 mm with the legend "DANGER HIGH VOLTAGE KEEP OUT" printed in three lines of nominal 75 mm high white letters on a red and black field.

1.12 ELECTRICAL REQUIREMENTS

Electrical installations shall conform to IEEE C2 , NFPA 70 , and requirements specified herein.

1.13 INSTRUCTION TO GOVERNMENT PERSONNEL

Where specified in the technical sections, furnish the services of competent instructors to give full instruction to designated Government personnel in the adjustment, operation, and maintenance of the specified systems and equipment, including pertinent safety requirements as required. Instructors shall be thoroughly familiar with all parts of the installation and shall be trained in operating theory as well as practical operation and maintenance work. Instruction shall be given during the first regular work week after the equipment or system has been accepted and turned over to the Government for regular operation. The number of

SECTION 26 00 00.00 20 Page 5 man-days (8 hours per day) of instruction furnished shall be as specified in the individual section.

PART 2 PRODUCTS

2.1 FACTORY APPLIED FINISH

Electrical equipment shall have factory-applied painting systems which shall, as a minimum, meet the requirements of NEMA 250 corrosion-resistance test.

PART 3 EXECUTION

3.1 FIELD APPLIED PAINTING

Paint electrical equipment as required to match finish of adjacent surfaces or to meet the indicated or specified safety criteria. Painting shall be as specified in Section 09 90 00 PAINTS AND COATINGS .

3.2 FIELD FABRICATED NAMEPLATE MOUNTING

Provide number, location, and letter designation of nameplates as indicated. Fasten nameplates to the device with a minimum of two sheet-metal screws or two rivets.

3.3 WARNING SIGN MOUNTING

Provide the number of signs required to be readable from each accessible side, but space the signs a maximum of 9 meters apart.

-- End of Section --

SECTION 26 00 00.00 20 Page 6

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM Revised by Amendment 0004

02/14

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 WARRANTY

1.6 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

2.2.6.2 Communication Conduit

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

2.4 CABLE TRAYS

2.4.1 Electrical

2.4.1.1 Trough-Type Cable Trays

2.4.1.2 Ladder-Type Cable Trays

2.4.2 Communications Cable Trays

2.5 OUTLET BOXES AND COVERS

2.5.1 Floor Outlet Boxes

2.6 CABINETS, JUNCTION BOXES, AND PULL BOXES

2.7 WIRES AND CABLES

2.7.1 Conductors

2.7.1.1 Aluminum Conductors

SECTION 26 20 00 Page 1

2.7.1.2 Minimum Conductor Sizes

2.7.2 Color Coding

2.7.2.1 Ground and Neutral Conductors

2.7.2.2 Ungrounded Conductors

2.7.3 Insulation

2.7.4 Bonding Conductors

2.7.5 Service Entrance Cables

2.7.6 Nonmetallic Sheathed Cable

2.8 SPLICES AND TERMINATION COMPONENTS

2.9 DEVICE PLATES

2.10 SWITCHES

2.10.1 Toggle Switches

2.10.2 Switch with Red Pilot Handle

2.10.3 Disconnect Switches

2.11 FUSES

2.11.1 Fuseholders

2.11.2 Cartridge Fuses, Current Limiting Type (Class R)

2.11.3 Cartridge Fuses, High-Interrupting Capacity, Current Limiting

Type (Classes J, L, and CC)

2.11.4 Cartridge Fuses, Current Limiting Type (Class T)

2.12 RECEPTACLES

2.12.1 Weatherproof Receptacles

2.12.2 Ground-Fault Circuit Interrupter Receptacles

2.12.3 Special Purpose Receptacles

2.12.4 Dryer Receptacles

2.13 PANELBOARDS

2.13.1 Enclosure

2.13.2 Panelboard Buses

2.13.3 Circuit Breakers

2.13.3.1 Multipole Breakers

2.13.3.2 Circuit Breaker With Ground-Fault Circuit Interrupter

2.13.3.3 Circuit Breakers for HVAC Equipment

2.13.3.4 Arc-Fault Circuit Interrupters

2.14 RESIDENTIAL LOAD CENTERS

2.14.1 RLC Buses

2.14.2 Circuit Breakers

2.14.2.1 Multipole Breakers

2.14.2.2 Circuit Breaker With Ground-Fault Circuit Interrupter

2.14.2.3 Arc-Fault Circuit-Interrupters

2.15 LOAD CENTERS FOR HOUSING UNITS

2.15.1 Panelboard Buses

2.15.2 Circuit Breakers

2.15.2.1 Multipole Breakers

2.15.2.2 Arc-Fault Circuit-Interrupters

2.16 MOTOR SHORT-CIRCUIT PROTECTOR (MSCP)

2.17 TRANSFORMERS

2.17.1 Specified Transformer Efficiency

2.18 MOTORS

2.18.1 High Efficiency Single-Phase Motors

2.18.2 Premium Efficiency Polyphase Motors

2.18.3 Motor Sizes

2.18.4 Wiring and Conduit

2.19 MOTOR CONTROLLERS

2.19.1 Control Wiring

2.19.2 Control Circuit Terminal Blocks

2.19.2.1 Types of Terminal Blocks

2.19.3 Control Circuits

2.19.4 Enclosures for Motor Controllers

2.19.5 Multiple-Speed Motor Controllers and Reversible Motor

SECTION 26 20 00 Page 2

Controllers

2.19.6 Pushbutton Stations

2.19.7 Pilot and Indicating Lights

2.19.8 Reduced-Voltage Controllers

2.20 MANUAL MOTOR STARTERS (MOTOR RATED SWITCHES)

2.20.1 Pilot Lights

2.21 GROUNDING AND BONDING EQUIPMENT

2.21.1 Ground Rods

2.21.2 Ground Bus

2.22 MANUFACTURER'S NAMEPLATE

2.23 FIELD FABRICATED NAMEPLATES

2.24 WARNING SIGNS

2.25 FIRESTOPPING MATERIALS

2.26 WIREWAYS

2.27 METERING

2.28 METER BASE ONLY

2.29 SURGE PROTECTIVE DEVICES

2.30 FACTORY APPLIED FINISH

2.31 SOURCE QUALITY CONTROL

2.31.1 Transformer Factory Tests

2.32 COORDINATED POWER SYSTEM PROTECTION

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Underground Service

3.1.2 Hazardous Locations

3.1.3 Service Entrance Identification

3.1.3.1 Labels

3.1.4 Wiring Methods

3.1.4.1 Pull Wire

3.1.5 Conduit Installation

3.1.5.1 Restrictions Applicable to Aluminum Conduit

3.1.5.2 Restrictions Applicable to EMT

3.1.5.3 Restrictions Applicable to Nonmetallic Conduit

3.1.5.4 Restrictions Applicable to Flexible Conduit

3.1.5.5 Underground Conduit

3.1.5.5.1 Electrical

3.1.5.5.2 Communications Underground Conduit

3.1.5.6 Conduit Installed Under Floor Slabs

3.1.5.7 Conduit Through Floor Slabs

3.1.5.8 Conduit Installed in Concrete Floor Slabs

3.1.5.9 Stub-Ups

3.1.5.10 Conduit Support

3.1.5.11 Directional Changes in Conduit Runs

3.1.5.12 Locknuts and Bushings

3.1.5.13 Flexible Connections

3.1.6 Cable Tray Installation

3.1.7 Boxes, Outlets, and Supports

3.1.7.1 Boxes

3.1.7.2 Pull Boxes

3.1.7.3 Extension Rings

3.1.8 Mounting Heights

3.1.9 Conductor Identification

3.1.9.1 Marking Strips

3.1.10 Splices

3.1.10.1 Aluminum Conductors

3.1.11 Covers and Device Plates

3.1.12 Electrical Penetrations

SECTION 26 20 00 Page 3

3.1.13 Grounding and Bonding

3.1.13.1 Ground Rods

3.1.13.2 Grounding Connections

3.1.13.3 Ground Bus

3.1.13.4 Resistance

3.1.14 Equipment Connections

3.1.15 Repair of Existing Work

3.1.15.1 Workmanship

3.1.15.2 Existing Concealed Wiring to be Removed

3.1.15.3 Removal of Existing Electrical Distribution System

3.1.15.4 Continuation of Service

3.1.16 Watthour Meters

3.1.17 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 4

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

Revised by Amendment 0004

02/14

PART 1 GENERAL

1.1 REFERENCES

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

AMERICAN NATIONAL STANDARDS INSTITUTE/TELECOMMUNICATIONS INDUSTRY

ASSOCIATION /ELECTRONICS INDUSTRY ASSOCIATION (ANSI/TIA/EIA)

TIA/EIA-568 (2009 c) AND addendums, Generic Telecommunications Cabling for Customer Premises.

TIA/EIA 569 (2015 d) Telecommunications Pathways and Spaces

TIA/EIA 606 (2007 a) Administration Standard for Commercial Telecommunications Infrastructure

TIA/EIA 607 (2015 c) Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises

ASTM INTERNATIONAL (ASTM)

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

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

ASTM D709 (2016) Standard Specification for Laminated Thermosetting Materials

BRITISH STANDARDS INSTITUTE (BS)

BS 1363-2 (Jan 1995, Amd 1) 13 A Plugs, socket-outlets & adaptors - Specification for 13A switched and un-switched socket-outlets

BS 7671 (Requirements for Electrical Installation, 1997, Amd 2)

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 100 (2000; Archived) The Authoritative

SECTION 26 20 00 Page 5

Dictionary of IEEE Standards Terms

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

IEEE C2 (2017) National Electrical Safety Code

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2013) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

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

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

ANSI C80.1 (2005) American National Standard for Electrical Rigid Steel Conduit (ERSC)

ANSI C80.3 (2015) American National Standard for Electrical Metallic Tubing (EMT)

ANSI C80.5 (2015) American National Standard for Electrical Rigid Aluminum Conduit

NEMA 250 (2014) Enclosures for Electrical Equipment (1000 Volts Maximum)

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 2005; Errata 2008) Industrial Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 4 (2015) Terminal Blocks

NEMA ICS 6 (1993; R 2011) Industrial Control and Systems: Enclosures

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

NEMA MG 1 (2016) Motors and Generators

NEMA MG 10 (2013) Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

SECTION 26 20 00 Page 6

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 (1992; R 1997) Standard for Dry-Type Transformers for General Applications

NEMA TC 2 (2013) Standard for Electrical Polyvinyl Chloride (PVC) Conduit

NEMA TC 3 (2015) 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 (2009) Standard for Metal Cable Tray Systems

NEMA WD 1 (1999; R 2015) Standard for General Color Requirements for Wiring Devices

NEMA Z535.4 (2011) American National Standard for Product Safety Signs and Labels

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017) National Electrical Code

NFPA 70E (2015; ERTA 1 2015) Standard for Electrical Safety in the Workplace

UNDERWRITERS LABORATORIES (UL)

UL 1 (2005; Reprint Jul 2012) Standard for Flexible Metal Conduit

UL 1063 (2006; Reprint Jul 2012) Machine-Tool Wires and Cables

UL 1242 (2006; Reprint Mar 2014) Standard for Electrical Intermediate Metal Conduit -- Steel

UL 1449 (2014; Reprint Mar 2016) UL Standard for Safety Surge Protective Devices

UL 1660 (2014) Liquid-Tight Flexible Nonmetallic Conduit

UL 1699 (2006; Reprint Nov 2013) Arc-Fault Circuit-Interrupters

UL 198M (2003; Reprint Feb 2013) Standard for Mine-Duty Fuses

SECTION 26 20 00 Page 7

UL 360 (2013; Reprint Jan 2015) Liquid-Tight Flexible Steel Conduit

UL 4248-1 (2007; Reprint Oct 2013) UL Standard for Safety Fuseholders - Part 1: General Requirements

UL 4248-12 (2007; Reprint Dec 2012) UL Standard for Safety Fuseholders - Part 12: Class R

UL 44 (2014; Reprint Feb 2015) Thermoset-Insulated Wires and Cables

UL 467 (2013) Grounding and Bonding Equipment

UL 486A-486B (2013; Reprint Jan 2016) Wire Connectors

UL 486C (2013; Reprint Jan 2016) Splicing Wire Connectors

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

UL 5 (2016) UL Standard for Safety Surface Metal Raceways and Fittings

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

UL 506 (2008; Reprint Oct 2013) Specialty Transformers

UL 508 (1999; Reprint Oct 2013) Industrial Control Equipment

UL 510 (2005; Reprint Jul 2013) Polyvinyl Chloride, Polyethylene and Rubber Insulating Tape

UL 514A (2013) Metallic Outlet Boxes

UL 514B (2012; Reprint Nov 2014) Conduit, Tubing and Cable Fittings

UL 514C (2014; Reprint Dec 2014) Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers

UL 6 (2007; Reprint Nov 2014) Electrical Rigid Metal Conduit-Steel

UL 651 (2011; Reprint Jun 2016) UL Standard for Safety Schedule 40 and 80 Rigid PVC Conduit and Fittings

UL 67 (2009; Reprint Dec 2016) UL Standard for

SECTION 26 20 00 Page 8

Safety Panelboards

UL 6A (2008; Reprint Nov 2014) Electrical Rigid Metal Conduit - Aluminum, Red Brass, and Stainless Steel

UL 719 (2006; Reprint Apr 2013) Nonmetallic-Sheathed Cables

UL 797 (2007; Reprint Dec 2012) Electrical Metallic Tubing -- Steel

UL 83 (2014) Thermoplastic-Insulated Wires and Cables

UL 854 (2004; Reprint Nov 2014) Standard for Service-Entrance Cables

UL 869A (2006) Reference Standard for Service Equipment

UL 870 (2016) UL Standard for Safety Wireways, Auxiliary Gutters, and Associated Fittings

UL 943 (2016) UL Standard for Safety Ground-Fault Circuit-Interrupters

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

1.2 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, are as defined in IEEE 100 , TIA/EIA-568 and TIA/EIA 606 .

1.3 SUBMITTALS

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

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00.

SD-02 Shop Drawings

Panelboards; G M

Transformers; G M

Busway; G M

Cable trays; G M

Motor control centers; G M

Include wiring diagrams and installation details of equipment

SECTION 26 20 00 Page 9 indicating proposed location, layout and arrangement, control panels, accessories, piping, ductwork, and other items that must be shown to ensure a coordinated installation. Identify circuit terminals on wiring diagrams and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Indicate on the drawings adequate clearance for operation, maintenance, and replacement of operating equipment devices.

Communication system conduit installation/routing; G M

Wireways; G M

Load centers for housing units; G M

Marking strips drawings; G M

SD-03 Product Data

Receptacles

Circuit breakers

Switches

Transformers

Enclosed circuit breakers

Motor controllers

Combination motor controllers

Load centers for housing units

Manual motor starters

Residential load centers

Metering

Surge protective devices

Communication system conduit; G M

Communication metal boxes; G M

Communication system ground bars; G M

SD-06 Test Reports

600-volt wiring test; G M

Grounding system test; G M

Transformer tests; G M

Ground-fault receptacle test; G M

SECTION 26 20 00 Page 10

SD-07 Certificates

Fuses

SD-09 Manufacturer's Field Reports

Transformer factory tests

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" or "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 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 and:

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 WARRANTY

Provide equipment items supported by service organizations that are reasonably convenient to the equipment installation in order to render

SECTION 26 20 00 Page 11 satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

1.6 SEISMIC REQUIREMENTS

Provide seismic details conforming to Section 13 48 00, SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT and to Section 26 05 48.00 10, SEISMIC

PROTECTION FOR ELECTRICAL EQUIPMENT.

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

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

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 .

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 thick).

2.2.6 Flexible Metal Conduit

UL 1 .

2.2.6.1 Liquid-Tight Flexible Metal Conduit, Steel

UL 360 .

2.2.6.2 Communication Conduit

All communication conduit to be UL listed (or other internationally recognized/certified body) as a grounding conductor.

SECTION 26 20 00 Page 12

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

Steelcompression type.

2.2.8 Fittings for Rigid Nonmetallic Conduit

NEMA TC 3 for PVC and UL 514B .

2.2.9 Liquid-Tight Flexible Nonmetallic Conduit

UL 1660 .

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

UL 5 , two-piece painted steel, totally enclosed, snap-cover type.

2.4 CABLE TRAYS

2.4.1 Electrical

NEMA VE 1. Provide the following:

a. Cable trays: form a wireway system, with a nominal 150 mm depth.

b. Cable trays: constructed of aluminumthat 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.

2.4.1.1 Trough-Type Cable Trays

Provide of nominal 305 mm width.

2.4.1.2 Ladder-Type Cable Trays

Provide of nominal 305 mm width with maximum rung spacing of 150 mm.

2.4.2 Communications Cable Trays

Refer to Section 27 05 28 36 40, Cable trays.

SECTION 26 20 00 Page 13

2.5 OUTLET BOXES AND COVERS

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

2.5.1 Floor Outlet Boxes

Provide the following:

a. Boxes: nonadjustable and concrete tight.

b. Each outlet: consisting of cast-metal body with threaded openings, for conduits, and cover plate with 19 mm threaded plug.

c. Receptacle outlets: consisting of flush aluminum or stainless steel housing with duplex-type receptacle as specified herein.

d. 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.

2.6 CABINETS, JUNCTION BOXES, AND PULL BOXES

Volume greater than 1640 mL, UL 50 , hot-dip, zinc-coated, if sheet steel.

Refer to Section 27 10 00 BUILDING TELECOMMUNICATIONS CABLING SYSTEM for communications cabinets.

2.7 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.

2.7.1 Conductors

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.

2.7.1.1 Aluminum Conductors

Shall not be used.

SECTION 26 20 00 Page 14

2.7.1.2 Minimum Conductor Sizes

Provide minimum conductor size in accordance with the following:

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.

2.7.2 Color Coding

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

2.7.2.1 Ground and Neutral Conductors

Provide color coding of ground and neutral conductors as follows:

a. Grounding conductors: Yellow/Green Green .

b. Neutral conductors: Blue 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.

2.7.2.2 Ungrounded Conductors

Provide color coding per Local Codes.

Voltage: 380/220 Volt, Three-Phase , Four Wire, 50 Hz

(1) Phase A - brown

(2) Phase B - black

(3) Phase C - gray

(4) Neutral - blue

(5) Ground/Earth - yellow/green

2.7.3 Insulation

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 , 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 lighting fixtures require 90-degree Centigrade (C) conductors, provide only conductors with 90-degree C insulation or better.

2.7.4 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

SECTION 26 20 00 Page 15 diameter. Communication system bonding shall be in accordance with

TIA/EIA 607 .

2.7.5 Service Entrance Cables

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

2.7.6 Nonmetallic Sheathed Cable

UL 719 , Type NM or NMC.

2.8 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: insulated, pressure-type in accordance with UL 486A-486B or UL 486C (twist-on splicing connector). Provide solderless terminal lugs on stranded conductors.

2.9 DEVICE PLATES

Provide the following:

a. UL listed, one-piece device plates for outlets to suit the devices installed.

b. For metal outlet boxes, plates on unfinished walls: zinc-coated sheet steel or cast metal having round or beveled edges.

c. For nonmetallic boxes and fittings, other suitable plates may be provided.

d. Plates on finished walls: satin finish stainless steel or brushed-finish aluminum, minimum 0.792 mm thick.

f. Screws: machine-type with countersunk heads in color to match finish of plate.

g. Sectional type device plates are not be permitted.

h. Plates installed in wet locations: gasketed and UL listed for "wet locations."

i. Communication plates are detailed in Section 27 10 00 BUILDING

TELECOMMUNICATIONS CABLING SYSTEM.

2.10 SWITCHES

2.10.1 Toggle Switches

Shall be in compliance with British Standards: BS 1363-2 and BS 7671 .

Include the following:

a. Handles: ivory thermoplastic.

b. Wiring terminals: screw-type, side-wired.

c. Contacts: silver-cadmium and contact arm - one-piece copper alloy.

SECTION 26 20 00 Page 16

d. Switches: rated quiet-type ac only, 220 volts, with current rating and number of poles indicated.

2.10.2 Switch with Red Pilot Handle

NEMA WD 1. Provide the following:

a. Pilot lights that are integrally constructed as a part of the switch's handle.

b. Pilot light color: red and illuminate whenever the switch is closed or "on".

c. Pilot lighted switch: rated 20 amps and 220 volts or 277 volts as indicated.

d. The circuit's neutral conductor to each switch with a pilot light.

2.10.3 Disconnect Switches

NEMA KS 1. Provide heavy duty-type switches where indicated, where switches are rated higher than 240 volts, and for double-throw switches.

Utilize Class R fuseholders and fuses for fused switches, unless indicated otherwise. Provide horsepower rated for switches serving as the motor-disconnect means. Provide switches in NEMA enclosure per NEMA ICS 6 .

2.11 FUSES

NEMA FU 1. Provide complete set of fuses for each fusible switch panel and control center. Coordinate time-current characteristics curves of fuses serving motors or connected in series with circuit breakers or other circuit protective devices for proper operation. Submit coordination data for approval. Provide fuses with a voltage rating not less than circuit voltage.

2.11.1 Fuseholders

Provide in accordance with UL 4248-1 .

2.11.2 Cartridge Fuses, Current Limiting Type (Class R)

UL 198M , Class time-delay type. Provide only Class R associated fuseholders in accordance with UL 4248-12 .

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

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

2.11.4 Cartridge Fuses, Current Limiting Type (Class T)

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

2.12 RECEPTACLES

Provide the following:

SECTION 26 20 00 Page 17

a. BS 1363-2 grounding-type.

b. Ratings and configurations: 13 amp minimum.

c. Bodies: ivory as per NEMA WD 1.

d. Face and body: thermoplastic supported on a metal mounting strap.

e. Dimensional requirements: per British Standards: BS 1363-2 and BS 7671 ..

f. Screw-type, side-wired wiring terminals or of the solderless pressure type having suitable conductor-release arrangement.

g. Grounding pole connected to mounting strap.

h. The receptacle: containing triple-wipe power contacts and double or triple-wipe ground contacts.

2.12.1 Weatherproof Receptacles

Provide receptacles, UL listed for use in "wet locations". Include cast metal box with gasketed, hinged, lockable and weatherproof while-in-use, die-cast metal/aluminum cover plate.

2.12.2 Ground-Fault Circuit Interrupter Receptacles

UL 943 , duplex type for mounting in standard outlet box. Provide device capable of detecting current leak of 30 milliamperes or greater and tripping per requirements of UL 943 for Class A ground-fault circuit interrupter devices. Provide screw-type, side-wired wiring terminals or pre-wired (pigtail) leads.

2.12.3 Special Purpose Receptacles

Furnish one matching plug with each receptacle.

2.12.4 Dryer Receptacles

IEC 60309, IP44 configuration, rated 32 amperes, 220/250 volts. Furnish one matching plug with each receptacle.

2.13 PANELBOARDS

Provide panelboards in accordance with the following:

a. UL 67 and UL 50 having a short-circuit current rating of 10,000 amperes symmetrical minimum.

b. Panelboards for use as service disconnecting means: additionally conform to UL 869A .

c. Panelboards: circuit breaker-equipped.

d. Designed such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL.

d. Use of "Subfeed Breakers" is not acceptable unless specifically

SECTION 26 20 00 Page 18 indicated otherwise.

e. Main breaker: "separately" mounted "above" branch breakers.

f. Where "space only" is indicated, make provisions for future installation of breakers.

g. Directories: indicate load served by each circuit in panelboard.

h. Directories: indicate source of service to panelboard (e.g., Panel PA served from Panel MDP).

i . Type directories and mount in holder behind transparent protective covering.

j. Panelboards: listed and labeled for their intended use.

2.13.1 Enclosure

Provide panelboard enclosure in accordance with the following:

a. UL 50 .

b. Cabinets mounted outdoors or flush-mounted: hot-dipped galvanized after fabrication.

c. Cabinets: painted in accordance with paragraph PAINTING.

d. Outdoor cabinets: NEMA 3R raintight with conduit hubs welded to the cabinet.

e. Front edges of cabinets: form-flanged or fitted with structural shapes welded or riveted to the sheet steel, for supporting the panelboard front.

f. All cabinets: fabricated such that no part of any surface on the finished cabinet deviates from a true plane by more than 3 mm.

g. Holes: provided in the back of indoor surface-mounted cabinets, with outside spacers and inside stiffeners, for mounting the cabinets with a 15 mm clear space between the back of the cabinet and the wall surface.

h. Flush doors: mounted on hinges that expose only the hinge roll to view when the door is closed.

i. Each door: fitted with a combined catch and lock, except that doors over 600 mm long provided with a three-point latch having a knob with a T-handle, and a cylinder lock.

j. Keys: two provided with each lock, with all locks keyed alike.

k. Finished-head cap screws: provided for mounting the panelboard fronts on the cabinets.

2.13.2 Panelboard Buses

Support bus bars on bases independent of circuit breakers. Design main buses and back pans so that breakers may be changed without machining, SECTION 26 20 00 Page 19 drilling, or tapping. Provide isolated neutral bus in each panel for connection of circuit neutral conductors. Provide separate ground bus identified as equipment grounding bus per UL 67 for connecting grounding conductors; bond to steel cabinet.

2.13.3 Circuit Breakers

UL 489 , thermal magnetic-type having a minimum short-circuit current rating equal to the short-circuit current rating of the panelboard in which the circuit breaker will be mounted. Breaker terminals: UL listed as suitable for type of conductor provided. Series rated circuit breakers and plug-in circuit breakers are unacceptable.

2.13.3.1 Multipole Breakers

Provide common trip-type with single operating handle. Design breaker such that overload in one pole automatically causes all poles to open.

Maintain phase sequence throughout each panel so that any three adjacent breaker poles are connected to Phases A, B, and C, respectively.

2.13.3.2 Circuit Breaker With Ground-Fault Circuit Interrupter

UL 943 and NFPA 70 . Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect and trip on current imbalance of 6 milliamperes or greater per requirements of UL 943 for Class A ground-fault circuit interrupter.

2.13.3.3 Circuit Breakers for HVAC Equipment

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

Series rated circuit breakers and plug-in circuit breakers are not acceptable.

2.13.3.4 Arc-Fault Circuit Interrupters

UL 489 , UL 1699 and NFPA 70 . Molded case circuit breakers: rated as indicated. Two pole arc-fault circuit-interrupters: rated 240 volts.

The provision of (two) one pole circuit breakers for shared neutral circuits in lieu of (one) two pole circuit breaker is unacceptable.

Provide with "push-to-test" button.

2.14 RESIDENTIAL LOAD CENTERS

Provide residential load centers (RLCs) in accordance with the following:

a. UL 67 and UL 50 .

b. RLCs for use as service disconnecting means: additionally conform to

UL 869A .

c. Circuit breaker equipped. Series rated circuit breakers and plug-in circuit breakers are not acceptable.

d. Designed such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL.

SECTION 26 20 00 Page 20

e. Where "space only" is indicated, make provisions for future installation of breakers sized as indicated.

f. Provide printed directories.

2.14.1 RLC Buses

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

2.14.2 Circuit Breakers

UL 489 , thermal magnetic-type with interrupting capacity of 10,000 minimum amperes rms symmetrical. Breaker terminals: UL listed as suitable for the type of conductor provided.

2.14.2.1 Multipole Breakers

Provide common trip-type with single operating handle. Provide a breaker design such that overload in one pole automatically causes all poles to open. Maintain phase sequence throughout each panel so that any two adjacent breaker poles are connected to alternate phases in sequence.

2.14.2.2 Circuit Breaker With Ground-Fault Circuit Interrupter

UL 943 and NFPA 70 . Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect and trip on current imbalance of 6 milliamperes or greater per requirements of UL 943 for Class A ground-fault circuit interrupter devices.

2.14.2.3 Arc-Fault Circuit-Interrupters

UL 489 , UL 1699 and NFPA 70 . Molded case circuit breakers: rated as indicated. Two pole arc-fault circuit-interrupters: rated 240 volts.

The provision of (two) one pole circuit breakers for shared neutral circuits in lieu of (one) two pole circuit breaker is unacceptable.

Provide with "push-to-test" button.

2.15 LOAD CENTERS FOR HOUSING UNITS

Provide single-phase panelboards for housing units on this project in accordance with the following:

a. Load center type, circuit breaker equipped, conforming to UL 67 and

UL 50 .

b. Panelboards series short-circuit current rating: 22,000 amperes symmetrical minimum for the main breaker and the branch breakers.

c. Panelboards for use as service disconnecting means: additionally conform to UL 869A .

d. DDesigned such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as

SECTION 26 20 00 Page 21 required by UL.

e. "Specific breaker placement" is required in panelboards to match the breaker placement indicated in the panelboard schedule on the drawings.

f. Where "space only" is indicated, make provisions for future installation of breakers.

g. Provide cover with latching door.

h. Directories: indicate load served by each circuit in panelboard.

i. Directories: indicate source of service to panelboard (e.g., Panel PA served from panel MDP).

j. Type directories and mount behind in holder with transparent protective covering on inside of panel door.

2.15.1 Panelboard Buses

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

2.15.2 Circuit Breakers

UL 489 thermal magnetic type having a minimum short-circuit current rating equal to the short-circuit current rating of the panelboard in which the circuit breaker will be mounted. Breaker terminals: UL listed as suitable for type of conductor provided. Half-size and tandem breakers are not acceptable. Provide switch duty rated 20 ampere breakers.

Breakers must not require use of panel trim to secure them to the bus.

2.15.2.1 Multipole Breakers

Provide common trip-type with single operating handle. Design breaker such that overload in one pole automatically causes all poles to open.

Maintain phase sequence throughout each panel so that any two adjacent breaker poles are connected to Phases A and B respectively.

2.15.2.2 Arc-Fault Circuit-Interrupters

UL 489 , UL 1699 and NFPA 70 . Molded case circuit breakers: rated as indicated. Two pole arc-fault circuit-interrupters: rated 240 volts.

The provision of (two) one pole circuit breakers for shared neutral circuits in lieu of (one) two pole circuit breaker is unacceptable.

Provide with "push-to-test" button.

2.16 MOTOR SHORT-CIRCUIT PROTECTOR (MSCP)

Motor short-circuit protectors, also called motor circuit protectors (MCPs): UL 508 and UL 489 , and provided as shown. Provide MSCPs that consist of an adjustable instantaneous trip circuit breaker used only in conjunction with a combination motor controller which provides coordinated

SECTION 26 20 00 Page 22 motor branch-circuit overload and short-circuit protection. Rate MSCPs in accordance with the requirements of NFPA 70 .

2.17 TRANSFORMERS

Provide transformers in accordance with the following:

a. NEMA ST 20 , general purpose, dry-type, self-cooled, ventilated.

b. Provide transformers in NEMA 1 enclosure.

c. Transformer insulation system:

(1) 220 degrees C insulation system for transformers 15 kVA and greater, with temperature rise not exceeding 150 degrees C under full-rated load in maximum ambient of 40 degrees C.

(2) 180 degrees C insulation for transformers rated 10 kVA and less, with temperature rise not exceeding 150 degrees C under full-rated load in maximum ambient of 40 degrees C.

d. Transformer of 150 degrees C temperature rise: capable of carrying continuously 100 percent of nameplate kVA without exceeding insulation rating.

e. Transformers: quiet type with maximum sound level at least 3 decibels less than NEMA standard level for transformer ratings indicated.

2.17.1 Specified Transformer Efficiency

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

2.18 MOTORS

Provide motors in accordance with the following:

a. NEMA MG 1.

b. Hermetic-type sealed motor compressors: Also comply with UL 984 .

c. Provide the size in terms of kW, or kVA, or full-load current, or a combination of these characteristics, and other characteristics, of each motor as indicated or specified.

d. Determine specific motor characteristics to ensure provision of correctly sized starters and overload heaters.

e. Rate motors for operation on 380-volt, 3-phase circuits with a terminal voltage rating of 460 volts.

f. Use motors designed to operate at full capacity with voltage variation of plus or minus 10 percent of motor voltage rating.

SECTION 26 20 00 Page 23

g. Unless otherwise indicated, use continuous duty type motors if rated 745 Watts and above.

h.