CCSC AV ELECTRICAL OUTLETS

ANCHORAGE, ALASKA

SECTION 26 05 50

BASIC MATERIALS AND METHODS

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PART 1 GENERAL

1.1 SCOPE: SECTION 26 05 50 ‐ BASIC MATERIALS AND METHODS

A. This Section covers general electrical requirements for Work covered under this Division.

B. All Work and Services specifically covered under this Division are supplementary to that covered under other Divisions of these Contract Documents. The requirements of this Division, which are more stringent than that covered under other parts of these Contract Documents, apply to Work covered under this Division.

C. All incidental Work required but not specified under this Division shall comply with the Division in which it is specified.

D. Review the Drawings and Specifications of all other Divisions for additional Work under Division 26.

1.2 GENERAL REQUIREMENTS

A. Provide all work as shown on the drawings and in these specifications for a complete, safe, and functional installation. All work shall comply with the latest edition of the National Electrical Code (NEC).

B. The Contractor is responsible for providing complete and operating systems in the facility.

The intention of the Contract Documents is to include all labor and materials, equipment, and transportation necessary or reasonably inferable as being necessary for the execution of the work. Where minor adjustments of the work are necessary for purposes of fabrication or installation of items, or resolution of conflicts between items within the intent of the Contract Documents, the Contractor shall make such adjustments at no added expense to the Government. Where such adjustments affect functional or aesthetic design of the work, they shall first be submitted to the Government’s Representative for review and approval.

C. Obtain and pay for all permits, plan reviews and inspections required for the work covered by this Division of the Specifications.

D. Unless otherwise noted, all materials shall be of new manufacture, and installed before expiration of their shelf life, if applicable.

E. Materials and equipment are to be those of major and reputable manufacturers with ability to render competent and thorough service through local and regional organizations capable of expeditiously providing service, parts and assistance.

F. Materials of similar nature, style, function, purpose and/or appearance shall be like products from the standard product line of the same manufacturer.

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G. All products shall be listed and labeled by an approved national testing laboratory for their intended use and location in all cases where such products are listed and labeled. Where no product listed by an approved national testing laboratory for the application is available, provide certification of performance, function and rating from an independent testing agency or laboratory approved by the Government.

H. Verification is required of all equipment sizes and locations prior to the ordering or installation of connection materials and disconnecting equipment to ensure that the power connections are of the proper size and type, and in the proper location. Verify all electrical loads (voltage, phase, full load amperes, number and point of connections, minimum circuit ampacity, etc.) for equipment furnished under all divisions of this specification, by reviewing respective shop drawings furnished under each division. Meet with each subcontractor furnishing equipment requiring electrical service and review electrical characteristics. Report any variances from electrical characteristics noted on the drawings with the Government before proceeding with rough work. Obtain and review the equipment shop drawings to determine particular final connection requirements before rough‐in begins for each equipment item.

I. The omission of express reference to any parts, supplies, services, or facilities necessary for, or incidental to, a complete installation shall not be construed as a release from furnishing such items.

J. All materials shall be installed in a neat, orderly, and secure fashion, as required by these specifications and commonly recognized standards of good workmanship. The norms for execution of the work shall be in conformity with NEC Chapter 3 and the National Electrical Contractors’ Association “National Electrical Installation Standards”, for which the Government's judgment shall be final.

1.3 DRAWINGS

A. Unless otherwise indicated, drawing symbols conform to the applicable standards of ANSI. The Drawings (or Contract Drawings) rely heavily upon symbolic representation of the features shown, and represent exact details only so far as indicated.

1. The Drawings are, to some extent, diagrammatic and are not intended to show exact details.

2. Dimensions scaled from the Drawings may vary due to tracing tolerances, printing distortion, field conditions, field changes, and other factors. For these reasons, it shall be the Contractor's responsibility to field verify dimensions that pertain to his work. The Contractor shall make minor relocations where necessary to resolve conflicts or present a uniform appearance. The drawings show exact location of electrical features only where specifically dimensioned.

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1.4 REPAIR OF EXISTING FEATURES

A. Where existing or previously completed building surfaces or other features must be cut, penetrated or otherwise altered for the installation of electrical features, such work shall be carefully laid out and performed, and any subsequent patching or repairs that it necessitates shall be performed by skilled mechanics of the trades involved.

1.5 PROTECTION OR CLEANING

A. All electrical equipment shall, during the entire duration of construction work, be protected against water, dust, debris, overspray or any other contamination, whether environmental in origin or as a result of construction work.

B. All construction dust, debris, overspray, scrap and surplus materials, etc. resulting from this work shall be cleared away, leaving the installation in completely clean condition.

1.6 SUBMITTALS

A. The materials for this project are mainly considered commodity items, conduits, conductors, receptacles and other non‐specialized electrical equipment. As such the contractor has the option to provide submittals for items which they would want to be reviewed, but is not specifically required to do such per this specification.

1.7 OPERATION AND MAINTENANCE MANUALS

A. The Contractor shall submit for review copies of Operation and Maintenance Manuals hereinafter called "O & M Manuals" for the project. These manuals shall be bound as specified for Submittals, and shall include:

1. All information covered by the final accepted submittals, modified as necessary to reflect the final as‐built condition.

2. Complete listings of repair and replacement parts for all equipment, and names and addresses of the suppliers from which the equipment was obtained.

3. Complete listing of all equipment which may require periodic servicing, with recommended schedules and complete instructions for performing said servicing.

Service instructions shall include complete English‐language narrative descriptions and illustrations as necessary to thoroughly describe all service operations. Illustrations with just multi‐language skeleton instructions are not acceptable.

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PART 2 PRODUCTS

2.1 RACEWAYS

A. Minimum size for all raceways shall be 1/2‐inch diameter. Minimum size of conduit for home‐runs shall be 3/4‐inch diameter.

B. Raceways shall be of types and characteristics recognized by the NEC.

C. Materials:

1. Electrical Metallic Tubing shall be hot‐dip galvanized, with smooth interior; Allied Tube & Conduit, J & L, Triangle, Youngstown, or equal

a. EMT shall be made up with concrete‐tight compression fittings. Provide rain‐tight compression EMT fittings for exterior locations. Connectors shall have insulated throats.

2. Flexible Metal Conduit ("flex") shall be Greenfield type, made of interlocking galvanized steel armor; Alflex, American Metal, Carol Cable Co., Electri‐flex, National Electric, RACO, Thomas & Betts, Triangle, or equal.

2.2 WIRES AND CABLES

A. Provide 600 volt building wire and cable as shown on the drawings and further specified herein. All wire and cable shall conform to the latest specifications of the NEC and/or the ICEA and shall be the products of American Insulated Wire, BICC General, Carol Cable, Excel Wire & Cable, Okonite, Southwire, Superior Essex, or equal.

B. Conductors: All conductors shall be copper, except as otherwise noted. Conductors No.

10 AWG and smaller shall be solid. Conductors No. 8 AWG or larger shall be stranded.

C. Insulation Types:

1. Branch circuit conductors will consist of conductors run in conduit and raceways.

a. Branch circuit conductors in raceways shall be 600 volt insulated, and unless otherwise noted on the drawings, shall have the following insulation types:

1) Heated indoor spaces ‐ THHN/THWN or XHHW.

2) In conduit, outdoors or other cold locations (such as attics) ‐

XHHW.

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2.3 OUTLET BOXES

A. Boxes shall be deep‐type (2‐1/8 inch nominal) unless space limitations or drawing notes require shallower boxes.

2.4 WIRING DEVICES AND PLATES

A. Receptacles:

1. Single and duplex receptacles shall be Extra Heavy Duty grade, nylon faced, ivory‐ color, self‐grounding, 120‐volt, 20 amp, 3‐wire, NEMA 5‐20R configuration, with screw terminals.

B. Plates:

1. Cover plates for devices in surface‐mounted boxes shall be of pressed or machined metal construction, specifically designed to suit the boxes.

C. Terminals

1. Wiring devices shall have binding‐screw type terminals only. Terminals using spring pressure to secure the wire and make electrical contact are not permitted.

D. Manufacturers

1. Among the acceptable wiring devices and plates are the products of Arrow‐Hart, Bryant, Hubbell, Leviton, Pass & Seymour, or equal.

2.5 GROUNDING

A. All metal raceways, enclosures, other electrical equipment and non‐electrical equipment such as tanks and dispenser platforms that may pick up harmful potentials from the electrical system, shall be securely bonded and grounded as required by the NEC and the drawings.

B. All grounding conductors and bonding jumpers shall be copper, sized according to the NEC or as noted on the Drawings.

PART 3 EXECUTION

3.1 IDENTIFICATION OF ELECTRICAL EQUIPMENT

A. Provide new updated typed circuit directories for all panelboards affected by the Work of this project. Each entry shall accurately and uniquely identify the specific purpose of the

26 05 50‐ 6 connected load of the circuit from all others in the same panelboard (i.e., Lighting, Receptacles, Mechanical Equipment, etc.) in accordance with NEC 408.4. The circuit directory shall be installed on the inside cover of each panelboard.

B. All conductors in pull or junction boxes or other enclosures shall be permanently and legibly tagged or labeled with panel and circuit numbers or other data, which clearly identifies their origin, function, and destination.

3.2 RACEWAYS

A. All conductors shall be installed in metal raceways, or as otherwise noted on the drawings and/or specified herein.

B. Branch Raceways ‐ Unless otherwise shown, raceways concealed in non‐concrete walls or above suspended ceilings shall be Electrical Metallic Tubing (EMT). Exposed raceways shall be surface metal raceway in finished areas, Electrical Metallic Tubing (EMT) in all other spaces.

C. Exposed raceways shall be run square with the building lines. Concealed raceways may be run in direct lines where practical.

D. Structural members shall not be cut, drilled, or notched for raceways or other electrical features unless specifically accepted by the Government.

E. Maintain a minimum 6‐inch clearance between conduit and piping. Maintain 12‐inch clearance between conduit and heat sources such as flues, steam pipes, heating pipes, and heating appliances.

F. Raceways shall be installed in switchboards, panelboards, gutters, pull boxes and the like from the back of the enclosure closest to the mounting surface, to the front in a manner that will not obstruct the future installation of raceways.

G. Raceways shall be physically and electrically continuous from enclosure to enclosure.

Electrical continuity for conduits shall be assured by inclusion of an NEC‐sized grounding conductor. For metallic conduits, it shall also be assured by making up all joints wrench‐ tight and free of foreign materials. Threaded conduits shall enter enclosures by means of threaded hubs or double‐locknut‐and bushing connections. For conduits of one inch trade size and larger, bushings shall be of the insulated type.

H. Conduit joints shall be cut square, reamed smooth, and cleaned of burrs, cutting oil, cuttings, and other foreign materials prior to assembly. Ends shall be capped to prevent entrance of foreign materials during construction.

I. Bends, offsets, and saddles shall be made with factory elbows and fittings, or field‐made with approved benders, to not less than NEC‐required radii.

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3.3 WIRING AND CABLES

A. Branch circuit conductors shall be color‐coded by factory pigmentation of the insulation.

Larger conductors may be color‐coded by wrapping the ends with colored tape in all enclosures, except that white and green conductors may never be phase‐taped for any use other than neutral and ground, respectively.

B. Conductors No. 6 AWG and smaller shall be color‐coded by factory pigmentation of the insulation. Larger conductors may be color‐coded by wrapping the ends with colored tape in all enclosures, except that white (or gray) and green conductors may never be phase‐ taped for any use other than neutral and ground, respectively.

C. Color‐coding throughout the entire installation shall be as follows:

SYSTEM VOLTAGE

Conductor 120/240 208Y/120 480Y/277

Phase A Black Black Brown

Phase B Red Red Orange

Phase C N/A Blue Yellow

Neutral White White White/Gray

Ground Green Green Green

D. Branch circuit conductors shall be No. 12 AWG copper, except for the following:

1. Homeruns longer than 70 feet from a 208Y/120 volt panelboard shall not be less than No. 10 AWG conductors.

2. Where branch circuit conductor sizes are indicated on the drawings, they shall take precedence over the foregoing. Where field conditions dictate circuit routings that increase conductor lengths beyond what would be expected from the layout shown on the drawings, they shall be submitted to the Project Manager for acceptance.

3. Where conductor wire is larger than #12 AWG, contractor shall use wiring lugs to connect to wiring devices.

E. Common neutrals are not permitted for single phase branch circuits unless otherwise noted on the Drawings.

F. All conductor connections shall be made up securely with solderless pressure connectors such as setscrew lugs, split‐bolts, wirenuts, "wingnuts", or suitable crimp fittings. Live‐ spring connectors which cannot be tightened to a point where conductor deformation occurs (such as "Scotchloks") are not permitted. Each wirenut‐type connector shall not contain more than four conductors, regardless of size.

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G. Use compression type connectors for copper wire splices and taps, #6 AWG and larger.

Utilize heat shrink tubing of the proper voltage rating for uninsulated conductors and connectors.

H. Thoroughly clean wires before installing lugs and connectors.

I. Make splices, taps and terminations to carry full ampacity of conductors without perceptible temperature rise.

J. Terminate spare conductors with wire nuts.

K. Where stranded conductors #14 AWG and smaller are used, their ends shall be twisted and "tinned" with solder prior to connection, or else terminated with crimp‐on connectors (T & B Sta‐Kon, or equal), set screw lugs, box lugs, or self‐lifting pressure terminals.

L. Flexible cords shall be connected to equipment, fixtures, boxes, or other enclosures only by means of cord‐grip bodies or other strain‐relief fittings specifically designed for the purpose. NM cable clamps are not permitted for this use.

M. Where conductors or their connectors are to be connected to metal surfaces, the surface shall first be scraped free of any paint, oxide, or other non‐conductive substances. Where there is a possibility of corrosion due to moisture or other cause, a conductive corrosion inhibitor shall be used between the conductor and the metal surface.

N. Conductors shall be pulled into raceways only by constant‐tension pulling methods.

Where necessary, wire‐pulling lubricants of a type that is not harmful to conductor insulation and will not harden shall be used.

O. Completely and thoroughly swab raceway system before installing conductors.

P. Neatly train and lace wiring inside boxes, equipment and panelboards.

Q. All conductors shall be protected from damage. Where the conductor or insulation is damaged, the Government may require, at no cost to the Government, the replacement of the entire conductor, or the implementation of an approved repair method approved by the Government.

END OF SECTION