26_20_00.pdf

UFGS

SECTION 26 20 00 Page 1

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

08/08

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 (ANSI)

ANSI C12.7 (2005) Requirements for Watthour Meter

Sockets

ASTM INTERNATIONAL (ASTM)

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

Hard-Drawn Copper Wire

ASTM B 8 (2004) Standard Specification for Concentric-

Lay-Stranded Copper Conductors, Hard, Medium-

Hard, or Soft

ASTM D 709 (2001; R 2007) Laminated Thermosetting

Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2007; Errata 2007) National Electrical

Safety Code

IEEE Std 100 (2000) The Authoritave Dictionary of IEEE

Standards Terms

IEEE Std 81 (1983) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface

Potentials of a Ground System (Part 1) Normal

Measurements

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2003) Acceptance Testing Specifications

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2003) Enclosures for Electrical Equipment

(1000 Volts Maximum)

NEMA BU 1.1 (2005) General Instructions for Proper

Handling, Installation, Operation, and

Maintenance of Busway Rated 600 Volts or Less

SECTION 26 20 00 Page 2

NEMA C12.1 (2001) Electric Meters; Code for Electricity

Metering

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

Conduit (ERSC)

NEMA C80.3 (2005) Standard for Electrical Metallic

Tubing (EMT)

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

Conduit (ERAC)

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

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

Control and Systems General Requirements

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

Standard for Industrial Control and Systems:

Controllers, Contractors, and Overload Relays

Rated Not More than 2000 Volts AC or 750

Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control Equipment

NEMA ICS 3 (2005) Standard for Industrial Control and

Systems: Medium Voltage Controllers Rated

2001 to 7200 Volts AC

NEMA ICS 4 (2005) Industrial Control and Systems:

Terminal Blocks

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

Controls and Systems Enclosures

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

Distribution Equipment Switches (600 Volts

Maximum)

NEMA MG 1 (2007) Standard for Motors and Generators

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

Selection and Use of Fixed Frequency Medium

AC Squirrel-Cage Polyphase Induction Motors

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

Selection and Use of Single Phase Motors

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

Externally Coated Galvanized Rigid Steel

Conduit and Intermediate Metal Conduit

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

Transformers for General Applications

NEMA TC 14 (2002) Standard for Reinforced Thermosetting

Resin Conduit (RTRC) and Fittings

SECTION 26 20 00 Page 3

NEMA TC 2 (2003) Standard for Electrical Polyvinyl

Chloride (PVC) Tubing and Conduit

NEMA TC 3 (2004) Standard for Polyvinyl Chloride PVC

Fittings for Use With Rigid PVC Conduit and

Tubing

NEMA TP 1 (2002) Guide for Determining Energy

Efficiency for Distribution Transformers

NEMA VE 1 (2002) Standard for Metallic Cable Tray

Systems

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

Requirements for Wiring Devices

NEMA WD 6 (2002) Standard for Wiring Devices -

Dimensional Requirements

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

Labels

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2007) National Electrical Code - 2008

Edition

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

Workplace

NFPA 780 (2007) Standard for the Installation of

Lightning Protection Systems

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

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

(Earthing) and Bonding Requirements for

Telecommunications

TIA/EIA-568-B.1 (2001 Addendums 2001, 2003, 2003, 2003, 2004, 2007) Commercial Building Telecommunications

Cabling Standard - Part 1: General

Requirements

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

Building Standards for Telecommunications

Pathways and Spaces

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

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

Out)

UNDERWRITERS LABORATORIES (UL)

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

Flexible Metal Conduit

SECTION 26 20 00 Page 4

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

UL 1063 (2006) Standard for Safety Machine-Tools

Wires and Cables

UL 1242 (2006; Rev thru Jul 2007) Standard for

Electrical Intermediate Metal Conduit --

Steel

UL 1449 (2006) Surge Protective Devices

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

Purpose and Power Transformers

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

UL 1660 (2004; Rev thru Jan 2005) Liquid-Tight

Flexible Nonmetallic Conduit

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

Interrupters

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

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

General-Use Snap Switches

UL 2043 (1996; Rev thru Jun 2001) Fire Test for Heat and Visible Smoke Release for Discrete

Products and Their Accessories Installed in

Air-Handling Spaces

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

Flexible Steel Conduit

UL 4 (2004) Armored Cable

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

UL 467 (2007) Standard for Grounding and Bonding

Equipment

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

Connectors

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

Splicing Wire Connectors

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

Molded-Case Circuit Breakers, Molded-Case

Switches and Circuit-Breaker Enclosures

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

SECTION 26 20 00 Page 5

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

Raceways and Fittings

UL 50 (2007) Standard for Enclosures for Electrical

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

Specialty Transformers

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

Industrial Control Equipment

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

UL 512 (1993; Rev thru Jan 2008) Fuseholders

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

Metallic Outlet Boxes

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

Conduit, Tubing and Cable Fittings

UL 514C (1996; Rev thru Mar 2007) Nonmetallic Outlet

Boxes, Flush-Device Boxes, and Covers

UL 5A (2003) Nonmetallic Surface Raceways and

Fittings

UL 6 (2007) Standard for Electrical Rigid Metal

Conduit-Steel

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

Schedule 40 and 80 Rigid PVC Conduit and

UL 67 (1993; Rev thru Apr 2006) Standard for

Panelboards

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

Electric Motors and Generators for Use in

Division 1 Hazardous (Classified) Locations

UL 698 (2006) Industrial Control Equipment for

Hazardous (Classified) Locations

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

Metal Conduit - Aluminum, Red Brass, and

Stainless Steel

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

Sheathed Cables

UL 797 (2007) Standard for Electrical Metallic

Tubing -- Steel

SECTION 26 20 00 Page 6

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

Power-Supply Cords

UL 83 (20086) Standard for Thermoplastic-Insulated

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

Control Centers

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

Cables

UL 857 (2001; Rev thru Nov 2002) Busways

UL 869A (2006) Reference Standard for Service

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

Wireways, Auxiliary Gutters, and Associated

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

Hazardous (Classified) Locations

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

Fittings for Use in Hazardous (Classified)

Locations

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

Circuit-Interrupters

UL 984 (1996; Rev thru Sept 2005) Hermetic

Refrigerant Motor-Compressors

1.2 DEFINITIONS

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

IEEE Std 100.

1.3 SUBMITTALS

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

submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section 01 33

00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Panelboards

Transformers

Busway

Cable trays

../01%2033%2000.doc ../01%2033%2000.doc

SECTION 26 20 00 Page 7

Motor control centers

Include wiring diagrams and installation details of equipment indicating proposed location, layout and arrangement, control panels, accessories, piping, ductwork, and other items that must be shown to ensure a coordinated installation. Wiring diagrams shall identify circuit terminals and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Drawings shall indicate adequate clearance for operation, maintenance, and replacement of operating equipment devices.

Wireways

Load centers for housing units

Marking strips drawings

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

Meter base only

CATV outlets

Telecommunications Grounding Busbar

Surge protective devices

Submittals shall include performance and characteristic curves.

SD-06 Test Reports

600-volt wiring test

Grounding system test

SECTION 26 20 00 Page 8

Transformer tests

Ground-fault receptacle test

SD-07 Certificates

Fuses

SD-09 Manufacturer's Field Reports

Transformer factory tests

SD-10 Operation and Maintenance Data

Electrical Systems, Data Package 5

Metering, Data Package 5

Submit operation and maintenance data in accordance with Section 01

78 23, OPERATION AND MAINTENANCE DATA and as specified herein.

1.4 QUALITY ASSURANCE

1.4.1 Fuses

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

1.4.2 Regulatory Requirements

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

1.4.3 Standard Products

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

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

../01%2078%2023.doc ../01%2078%2023.doc

SECTION 26 20 00 Page 9

1.4.3.1 Alternative Qualifications

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

1.4.3.2 Material and Equipment Manufacturing Date

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

1.5 MAINTENANCE

1.5.1 Electrical Systems

Submit operation and maintenance manuals for electrical systems that provide basic data relating to the design, operation, and maintenance of the electrical distribution system for the building. This shall include:

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

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

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

1.6 WARRANTY

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

1.7 SEISMIC REQUIREMENTS

Seismic details shall conform to Section 13 48 00, SEISMIC PROTECTION FOR

MISCELLANEOUS EQUIPMENT and to Section 26 05 48.00 10, SEISMIC PROTECTION

FOR ELECTRICAL EQUIPMENT be as indicated.

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

Materials, equipment, and devices shall, as a minimum, meet requirements of

UL, where UL standards are established for those items, and requirements of

NFPA 70.

2.2 CONDUIT AND FITTINGS

Shall conform to the following:

2.2.1 Rigid Metallic Conduit

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SECTION 26 20 00 Page 10

2.2.1.1 Rigid, Threaded Zinc-Coated Steel Conduit

NEMA C80.1, UL 6.

2.2.1.2 Rigid Aluminum Conduit

NEMA C80.5, UL 6A.

2.2.2 Rigid Nonmetallic Conduit

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

2.2.3 Intermediate Metal Conduit (IMC)

UL 1242, zinc-coated steel only.

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

UL 797, NEMA C80.3.

2.2.5 Plastic-Coated Rigid Steel and IMC Conduit

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

2.2.6 Flexible Metal Conduit

UL 1.

2.2.6.1 Liquid-Tight Flexible Metal Conduit, Steel

UL 360.

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

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

2.2.7.1 Fittings for Rigid Metal Conduit and IMC

Threaded-type. Split couplings unacceptable.

2.2.7.2 Fittings for EMT

Steel or Die cast compression type.

2.2.8 Fittings for Rigid Nonmetallic Conduit

NEMA TC 3 for PVC and UL 514B.

2.2.9 Liquid-Tight Flexible Nonmetallic Conduit

UL 1660.

SECTION 26 20 00 Page 11

2.3 SURFACE RACEWAY

2.3.1 Surface Metal Raceway

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

Receptacles shall be as specified herein and shall be spaced minimum of one every 18 inches. Alternate receptacles shall be wired on different circuits.

2.3.2 Surface Nonmetallic Raceway

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

Receptacles shall be as specified herein and shall be spaced minimum of one every 18 inches. Alternate receptacles shall be wired on different circuits.

2.4 BUSWAY

NEMA BU 1.1, UL 857. Buses shall be copper or aluminum. Busways shall be rated volts, continuous current amperes, three-phase, three- or four-wire, and include integral or internal 50-percent ground bus. Short circuit rating shall be root mean square (rms) symmetrical amperes minimum as indicated. Busway systems shall be suitable for use indoors. Enclosures shall be metallic. Hardware shall be plated or otherwise protected to resist corrosion. Joints shall be one-bolt type with through-bolts, which can be checked for tightness without deenergizing system. Maximum hot spot temperature rise at any point in busway at continuous rated load shall not exceed 55 degrees C above maximum ambient temperature of 40 degrees C in any position. Provide internal barriers to prevent movement of superheated gases. Contractor shall coordinate proper voltage phasing of entire bus duct system, for example where busway interfaces with transformers, switchgear, switchboards, motor control centers, and other system components.

2.4.1 Feeder Busways

Provide ventilated, except that vertical busways within 6 feet of floors shall be unventilated, unventilated, totally enclosed low-impedance busway.

Bus bars shall be fully covered with insulating material, except at stabs.

Entire busway system shall be polarized.

2.4.2 Plug-In Busways

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

2.5 CABLE TRAYS

NEMA VE 1. Cable trays shall form a wireway system, and shall be of nominal

6 inch depth as indicated. Cable trays shall be constructed of steel that has been zinc-coated after fabrication. Trays shall include splice and end plates, dropouts, and miscellaneous hardware. Edges, fittings, and hardware shall be finished free from burrs and sharp edges. Fittings shall have not

SECTION 26 20 00 Page 12 less than load-carrying ability of straight tray sections and shall have manufacturer's minimum standard radius. Radius of bends shall be 36 inches.

Radius of bends shall be as indicated.

2.5.1 Basket-Type Cable Trays

Provide size as indicated of nominal 18 inch width and 4 inch depth with maximum wire mesh spacing of 2 by 4 inch.

2.5.2 Trough-Type Cable Trays

Provide size as indicated of nominal 18 inch width.

2.5.3 Ladder-Type Cable Trays

Provide size as indicated of nominal 18 inch width with maximum rung spacing of 18 inches.

2.5.4 Channel-Type Cable Trays

Provide size as indicated of nominal 6 inch width. Trays shall be one-piece construction having slots spaced not more than 4 1/2 inches on centers.

2.5.5 Solid Bottom-Type Cable Trays

Provide size as indicated of nominal 18 inch width. Solid covers shall be provided.

2.5.6 Cantilever

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

2.6 OPEN TELECOMMUNICATIONS CABLE SUPPORT

2.6.1 Open Top Cable Supports

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

2.6.2 Closed Ring Cable Supports

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

2.7 OUTLET BOXES AND COVERS

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

2.7.1 Floor Outlet Boxes

Boxes shall be nonadjustable and concrete tight. Each outlet shall consist of nonmetallic or cast-metal body with threaded openings, or sheet-steel body with knockouts for conduits, adjustable, brass flange ring, and cover plate with 2 1/8 inch threaded plug. Telecommunications outlets shall consist of flush, aluminum or stainless steel housing with a receptacle as

SECTION 26 20 00 Page 13 specified and one inch bushed side opening 3/4 inch top opening. Receptacle outlets shall consist of flush aluminum or stainless steel housing with duplex-type receptacle as specified herein. Provide gaskets where necessary to ensure watertight installation. Provide plugs with installation instructions to the Contracting Officer for 5 percent of outlet boxes for the capping of outlets upon removal of service fittings.

2.7.2 Outlet Boxes for Telecommunications System

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

2.7.3 Clock Outlet for Use in Other Than Wired Clock System

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

2.8 CABINETS, JUNCTION BOXES, AND PULL BOXES

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

2.9 WIRES AND CABLES

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

2.9.1 Conductors

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

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

2.9.1.1 Equipment Manufacturer Requirements

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.

SECTION 26 20 00 Page 14

2.9.1.2 Aluminum Conductors

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

ensuring that pulling tension rating of aluminum conductor is sufficient;

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

2.9.1.3 Minimum Conductor Sizes

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

2.9.2 Color Coding

Provide for service, feeder, branch, control, and signaling circuit conductors. Color shall be green for grounding conductors and white for neutrals; except where neutrals of more than one system are installed in same raceway or box, other neutrals shall be white with a different colored

(not green) stripe for each. Color of ungrounded conductors in different voltage systems shall be as follows:

a. 208/120 volt, three-phase

(1) Phase A - black

(2) Phase B - red

(3) Phase C - blue

b. 480/277 volt, three-phase

(1) Phase A - brown

(2) Phase B - orange

(3) Phase C - yellow

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

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

2.9.3 Insulation

Unless specified or indicated otherwise or required by NFPA 70, power and lighting wires shall be 600-volt, Type THWN/THHN conforming to UL 83 or Type

XHHW or RHW conforming to UL 44, except that grounding wire may be type TW conforming to UL 83; remote-control and signal circuits shall be Type TW or

SECTION 26 20 00 Page 15

TF, conforming to UL 83. Where lighting fixtures require 90-degree

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

2.9.4 Bonding Conductors

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

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

2.9.4.1 Telecommunications Bonding Backbone (TBB)

Provide a copper conductor TBB in accordance with TIA J-STD-607-A. The TBB shall be a minimum No. 6 AWG and be sized at 2 kcmil per linear foot of conductor length up to a maximum size of 3/0 AWG. Provide insulated TBB with insulation as specified in the paragraph INSULATION and meeting the fire ratings of its pathway.

2.9.4.2 Bonding Conductor for Telecommunications

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

2.9.5 Service Entrance Cables

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

2.9.6 Nonmetallic Sheathed Cable

UL 719, Type NM or NMC.

2.9.7 Wire and Cable for 400 Hertz (Hz) Circuits

Insulated copper conductors.

2.9.8 Metal-Clad Cable

UL 1569; NFPA 70, Type MC cable.

2.9.9 Armored Cable

UL 4; NFPA 70, Type AC cable.

2.9.10 Mineral-Insulated, Metal-Sheathed Cable

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

2.9.11 Flat Conductor Cable

UL listed; NFPA 70, Type FCC.

2.9.12 Cable Tray Cable or Power Limited Tray Cable

UL listed; type TC or PLTC.

SECTION 26 20 00 Page 16

2.9.13 Cord Sets and Power-Supply Cords

UL 817.

2.10 SPLICES AND TERMINATION COMPONENTS

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

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

2.11 DEVICE PLATES

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

Plates on finished walls shall be nylon or lexan, minimum 0.03 inch wall thickness. Plates shall be same color as receptacle or toggle switch with which they are mounted. Plates on finished walls shall be satin finish stainless steel or brushed-finish aluminum, minimum 0.03 inch thick. Screws shall be machine-type with countersunk heads in color to match finish of plate. Sectional type device plates will not be permitted. Plates installed in wet locations shall be gasketed and UL listed for "wet locations." Device plates in areas normally accessible to prisoners shall be brown or ivory finish nylon-device plates rated for high abuse. Test device plates for compliance with UL 514A and UL 514C for physical strength.

Attach device plates with spanner head bolts.

2.12 SWITCHES

2.12.1 Toggle Switches

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

2.12.2 Switch with Red Pilot Handle

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

2.12.3 Breakers Used as Switches

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

SECTION 26 20 00 Page 17

2.12.4 Disconnect Switches

NEMA KS 1. Provide heavy duty-type switches where indicated, where switches are rated higher than 240 volts, and for double-throw switches. Fused switches shall utilize Class R fuseholders and fuses, unless indicated otherwise. Switches serving as motor-disconnect means shall be horsepower rated. Provide switches in NEMA 1,enclosure as indicated per NEMA ICS 6.

2.13 FUSES

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

2.13.1 Fuseholders

Provide in accordance with UL 512.

2.13.2 Cartridge Fuses, Current Limiting Type (Class R)

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

2.13.3 Cartridge Fuses, High-Interrupting Capacity, Current Limiting Type

(Classes J, L, and CC)

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

2.13.4 Cartridge Fuses, Current Limiting Type (Class T)

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

2.14 RECEPTACLES

UL 498, hard use, heavy-duty, UL 498, hospital grade, grounding-type.

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

2.14.1 Switched Duplex Receptacles

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

2.14.2 Weatherproof Receptacles

Provide in cast metal box with gasketed, weatherproof, cast-metal cover plate and gasketed cap over each receptacle opening. Provide caps with a

SECTION 26 20 00 Page 18 spring-hinged flap. Receptacle shall be UL listed for use in "wet locations with plug in use."

2.14.3 Ground-Fault Circuit Interrupter Receptacles

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

2.14.4 Special Purpose Receptacles

Receptacles serving are special purpose. Provide in ratings indicated.

2.14.5 Plugs

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

Government.

2.14.6 Range Receptacles

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

2.14.7 Dryer Receptacles

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

2.14.8 Tamper-Resistant Receptacles

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

2.15 PANELBOARDS

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

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

Directories shall indicate load served by each circuit in panelboard.

Directories shall also indicate source of service to panelboard (e.g., Panel

PA served from Panel MDP). Provide new directories for existing panels modified by this project as indicated. Type directories and mount in holder behind transparent protective covering. Panelboards shall be listed and

SECTION 26 20 00 Page 19 labeled for their intended use. Panelboard shall have nameplates in accordance with paragraph FIELD FABRICATED NAMEPLATES.

UL 67 and UL 50. Panelboards for use as service disconnecting means shall additionally conform to UL 869A. Panelboards shall be circuit breaker-equipped. Design shall be such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL. Where "space only" is indicated, make provisions for future installation of breaker sized as indicated. Directories shall indicate load served by each circuit of panelboard. Directories shall also indicate source of service (upstream panel, switchboard, motor control center, etc.)

to panelboard. Type directories and mount in holder behind transparent protective covering. Panelboard shall have nameplates in accordance with paragraph FIELD FABRICATED NAMEPLATES.

2.15.1 Enclosure

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

2.15.2 Panelboard Buses

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

2.15.2.1 Panelboard Neutrals for Non-Linear Loads

UL listed, and panelboard type shall have been specifically UL heat rise tested for use on non-linear loads. Panelboard shall be heat rise tested in accordance with UL 67, except with the neutral assembly installed and carrying 200 percent of the phase bus current during testing. Verification

SECTION 26 20 00 Page 20 of the testing procedure shall be provided upon request. Two neutral assemblies paralleled together with cable is not acceptable. Nameplates for panelboard rated for use on non-linear loads shall be marked "SUITABLE FOR

NON-LINEAR LOADS"and shall be in accordance with paragraph FIELD FABRICATED

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

2.15.3 Circuit Breakers

UL 489, solid state-type having a minimum short-circuit current rating equal to the short-circuit current rating of the panelboard in which the circuit breaker shall be mounted. Breaker terminals shall be UL listed as suitable for type of conductor provided. Where indicated on the drawings, provide circuit breakers with shunt trip devices. Series rated circuit breakers and plug-in circuit breakers without a self-contained bracket and not secured by a positive locking device requiring mechanical release for removal are unacceptable. Series rated circuit breakers and plug-in circuit breakers are unacceptable.

2.15.3.1 Multipole Breakers

Provide common trip-type with single operating handle. Breaker design shall be such that overload in one pole automatically causes all poles to open.

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

2.15.3.2 Circuit Breaker With GFCI or GFI

UL 943 and NFPA 70. Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect and trip on current imbalance of

6 milliamperes or greater per requirements of UL 943 for Class A GFCI or GFI devices, for personnel protection, and 20 milliamperes or greater per requirements of UL 943 for Class B GFCI or GFI per equipment protection.

2.15.3.3 Circuit Breakers for HVAC Equipment

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

2.15.3.4 Arc-Fault Circuit-Interrupters

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

2.15.4 Fusible Switches for Panelboards

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

2.15.5 400 Hz Panelboard and Breakers

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

SECTION 26 20 00 Page 21

2.16 RESIDENTIAL LOAD CENTERS

Provide residential load centers (RLCs), conforming to UL 67 and UL 50.

RLCs for use as service disconnecting means shall additionally conform to UL

869A. RLCs shall be circuit breaker equipped. Design shall be such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL. Where "space only" is indicated, make provisions for future installation of breakers sized as indicated.

Load centers shall have keyed locks. Printed directories shall be provided.

2.16.1 RLC Buses

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.

2.16.2 Circuit Breakers

UL 489, thermal magnetic-type with interrupting capacity as indicated of

10,000 minimum amperes rms symmetrical. Breaker terminals shall be UL listed as suitable for the type of conductor provided.

2.16.2.1 Multipole Breakers

Maintain phase sequence throughout each panel so that any two adjacent breaker poles are connected to alternate phases in sequence.

2.16.2.2 Circuit Breaker With GFCI or GFI

UL 943 and NFPA 70. Provide with "push-to-test" button, visible indication of tripped condition, and ability to detect and trip on current imbalance of

6 milliamperes or greater per requirements of UL 943 for Class A GFCI or GFI devices.

2.16.2.3 Arc-Fault Circuit-Interrupters

volts. The provision of (two) one pole circuit breakers for shared neutral

2.17 LOAD CENTERS FOR HOUSING UNITS

Single-phase panelboards for housing units on this project shall be load center type, circuit breaker equipped, conforming to UL 67 and UL 50.

Panelboards shall have a series short-circuit current rating of 22,000 amperes symmetrical minimum for the main breaker and the branch breakers.

Panelboards for use as service disconnecting means shall additionally conform to UL 869A. Design shall be such that individual breakers can be removed without disturbing adjacent units or without loosening or removing

SECTION 26 20 00 Page 22 supplemental insulation supplied as means of obtaining clearances as required by UL. "Specific breaker placement" is required in panelboards to match the breaker placement indicated in the panelboard schedule on the drawings. Where "space only" is indicated, make provisions for future installation of breakers. Provide cover with latching door. Directories shall indicate load served by each circuit in panelboard. Directories shall also indicate source of service to panelboard (e.g., Panel PA served from panel MDP). Type directories and mount behind transparent protective covering on inside of panel door in a manner approved by the Contracting

Officer.

2.17.1 Panelboard Buses

machining, drilling, or tapping. Bus bars shall be copper or aluminum, and shall be 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.

2.17.2 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 shall be UL listed as suitable for type of conductor provided. Half-size and tandem breakers are not acceptable. 15 and 20 ampere breakers shall be switch duty rated.

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

2.17.2.1 Multipole Breakers

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

2.17.2.2 Arc-Fault Circuit-Interrupters

volts. The provision of (two) one pole circuit breakers for shared neutral

2.18 ENCLOSED CIRCUIT BREAKERS

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

Provide solid neutral.

2.19 MOTOR SHORT-CIRCUIT PROTECTOR (MSCP)

Motor short-circuit protectors, also called motor circuit protectors (MCPs);

shall conform to UL 508 and UL 489 and shall be provided as shown. MSCPs shall consist of an adjustable instantaneous trip circuit breaker used only

SECTION 26 20 00 Page 23 in conjunction with a combination motor controller which provides coordinated motor branch-circuit overload and short-circuit protection.

MSCPs shall be rated in accordance with the requirements of NFPA 70.

2.20 TRANSFORMERS

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

Provide transformers in NEMA 3R enclosure. Transformer shall have 220 degrees C insulation system for transformers 15 kVA and greater, and shall have 180 degrees C insulation for transformers rated 10 kVA and less, with temperature rise not exceeding 150 degrees C under full-rated load in maximum ambient of 40 degrees C. Transformer of 150 degrees C temperature rise shall be capable of carrying continuously 100 percent of nameplate kVA without exceeding insulation rating. Transformer of 115 degrees C temperature rise shall be capable of carrying continuously 115 percent of nameplate kVA without exceeding insulation rating. Transformer of 80 degrees C temperature rise shall be capable of carrying continuously 130 percent of nameplate kVA without exceeding insulation rating. Transformers shall be quiet type with maximum sound level at least 3 decibels less than

NEMA standard level for transformer ratings indicated.

2.20.1 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, shall be energy efficient type. Minimum efficiency, based on factory test results, shall not be less than NEMA Class

1 efficiency as defined by NEMA TP 1.

2.20.2 Transformers With Non-Linear Loads

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

Neither the primary nor the secondary temperature shall exceed 220 degrees C at any point in the coils while carrying their full rating of non-sinusoidal load. Transformers are to be UL listed and labeled for K-4, K-9, K-13, or

K-Factor rating as indicated in accordance with UL 1561. Transformers evaluated by the UL K-Factor evaluation shall be listed for 115 degrees C average temperature rise only. Transformers with K-Factor ratings with temperature rise of 150 degrees C rise shall not be acceptable. K-Factor rated transformers shall have an impedance range of 3 percent to 5 percent, and shall have a minimum reactance of 2 percent to prevent excessive neutral current when supplying loads with large amounts of third harmonic.

2.21 MOTORS

NEMA MG 1 except fire pump motors shall be as specified in Section 21 30 00

FIRE PUMPS; hermetic-type sealed motor compressors shall also comply with UL

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

Motors for operation on 208-volt, 3-phase circuits shall have terminal voltage rating of 200 volts, and those for operation on 480-volt, 3-phase circuits shall have terminal voltage rating of 460 volts. Motors shall be designed to operate at full capacity with voltage variation of plus or minus

10 percent of motor voltage rating. Unless otherwise indicated, motors rated 745 Watts and above shall be continuous duty type.

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SECTION 26 20 00 Page 24

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

2.21.1 High Efficiency Single-Phase Motors

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

2.21.2 Premium Efficiency Polyphase Motors

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

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

In exception, for motor-driven equipment with a minimum seasonal or overall efficiency rating, such as a SEER rating, provide equipment with motor to meet the overall system rating indicated.

2.21.3 Motor Sizes

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

2.21.4 Wiring and Conduit

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

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

2.22 MOTOR CONTROLLERS

UL 508, NEMA ICS 1, and NEMA ICS 2, except fire pump controllers shall be as specified in Section 21 30 00 FIRE PUMPS. Controllers shall have thermal overload protection in each phase and shall have one spare normally open and one spare normally closed auxiliary contact. Provide controllers for motors rated 1-hp and above with electronic phase-voltage monitors designed to protect motors from phase-loss, undervoltage, and overvoltage. Provide protection for motors from immediate restart by a time adjustable restart relay. Magnetic-type motor controllers shall have undervoltage protection when used with momentary-contact pushbutton stations or switches and shall

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SECTION 26 20 00 Page 25 have undervoltage release when used with maintained-contact pushbutton stations or switches. When used with pressure, float, or similar automatic-type or maintained-contact switch, controller shall have hand/off/automatic selector switch. Connections to selector switch shall be such that only normal automatic regulatory control devices are bypassed when switch is in

"hand" position. Safety control…