Conduit, Conduit Fittings, and Boxes

63.5 mm (1 x 2-1/2 inches) 1 x 2-1/2 inches minimum with minimum 6.4 mm

(1/4 inch) 1/4 inch high normal block lettering. Nameplates shall be

provided as indicated. Nameplates shall be fastened to the device with a

minimum of two sheet metal screws or two rivets.

2.1.3

Conduit, Conduit Fittings, and Boxes

2.1.3.1

Rigid Steel or Intermediate Metal Conduit (IMC) and Fittings

The metal conduit and fittings shall be UL 6 and UL 1242, respectively,

coated with a polyvinylchloride (PVC) sheath bonded to the galvanized

exterior surface, nominal 1.0 mm (40 mils) 40 mils thick, conforming to

NEMA RN 1.

2.1.3.2

Flexible Metal Conduit

Flexible metal conduit shall be UL 1, zinc-coated steel.

Use UL 360

liquid-tight flexible metal conduit in wet locations.

2.1.3.3

Outlet Boxes for Use with Steel Conduit, Rigid or Flexible

These outlet boxes shall be UL 514A, cast metal with gasket closures.

2.1.3.4

Plastic Duct for Concrete Encased Burial

These ducts shall be [PVC conforming to NEMA TC 6 & 8, Type EB]

[provided

as specified in Section 16375A, ELECTRICAL DISTRIBUTION SYSTEM,

UNDERGROUND].

2.1.3.5

Plastic Conduit for Direct Burial

This plastic conduit shall be [PVC conforming to NEMA TC 2 (conduit) and

NEMA TC 3 (fittings) Type [EPC-40 PVC] [EPC-80 PVC]] [provided as specified

in Section 16375A, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND].

2.1.3.6

Frangible Couplings and Adapters

These frangible couplings shall be in accordance with FAA DWG C-6046.

Provide upper section of frangible coupling with one of the following:

a.

Unthreaded for slip-fitter connections.

b.

61.1 mm (2-13/32 inch) 2-13/32 inch - 16N-1A modified thread for

nut and compression ring to secure 53 mm (2 inch) 2 inch EMT.

c.

53 mm (2 inch) 2 inch - 11 1/2-N.P.T. (tapered) with 5.6 mm (7/32)

7/32 inch nominal wall thickness to accept rigid conduit coupling.

d.

Frangible Couplings for specialized applications as approved.

e.

Electrical Metallic Tubing UL 797 where indicated for use with

frangible couplings and adapters.

2.1.4

Wire and Cable

Conductors shall be copper except as otherwise indicated.

SECTION 16525A

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