Frangible Couplings and Adapters

2.3.6

MS 17814. Provide upper section of frangible coupling with one of the

following:

a.

Unthreaded for slip-fitter connections.

b.

60 mm 2 13/32 inch: 16N-1A modified thread for nut and

compression ring to secure 53 mm 2 inch EMT.

c.

53 mm 2 inch: 11 1/2-N.P.T. (tapered) with 5.5 mm 7/32-inch

nominal wall thickness to accept rigid conduit coupling.

[2.3.6.1

Frangible Couplings for Specialized Applications

Acceptable as approved.

]2.3.6.2

Electrical Metallic Tubing

UL 797. Provide where indicated for use with frangible couplings and

adapters.

2.4

WIRE AND CABLE

Do not provide or install wire and cable manufactured more than one year

before delivery to the job site. Conductors shall be copper.

2.4.1

Conductor Sizes

Conform to American Wire Gage (AWG).

2.4.2

Low Voltage Wire and Cable

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NOTE: Type THW insulation can only be obtained in

large quantity. Use of this type insulation is not

recommended for small project.

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[UL 854, Type USE, 600 volts for underground low voltage power cables.] [[

UL 83, Type [_____][THW][THWN]][UL 44, Type [XHHW][_____]] for secondary

series lighting circuits. Provide wire with "W" in the type designation in

wet or damp locations. ][As specified in Section 16302N UNDERGROUND

TRANSMISSION AND DISTRIBUTION.]

2.4.3

Power Cables for Use in Airfield Lighting

[Rated [5][_____] kV, [133 percent][_____] insulation level, with shield

and jacket conforming to [NEMA WC 7 for crosslinked polyethylene][ or ][

NEMA WC 8 for ethylene-propylene rubber] insulated cables. ][Provide as

specified in Section 16302N UNDERGROUND TRANSMISSION AND DISTRIBUTION.]

2.4.4

Wire and Cable for Airfield Lighting Systems

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NOTE: FAA AC 150/5345-7 covers Type A (rubber),

Type B (ethylene-propylene), and Type C (crosslinked

polyethylene) cable. Each type has 600-volt and

SECTION 16522N

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