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.
Upper section of frangible coupling shall be provided with one of the
following:
a.
Unthreaded for slip-fitter connections.
b.
61.1 mm 2-13/32 inch 16N-1A modified thread for nut and
compression ring to secure 50 mm 2 inch EMT.
c.
50 mm 2 inch 11-1/2-N.P.T. (tapered) with 5.6 mm 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.
2.1.3.7
Low-Impact-Resistant Towers
Fiberglass reinforced low-impact resistant (LIR) towers shall conform to [
FAA E-2702] [FAA AC 150/5345-45]. Anchor bolts, lowering devices and
fixture mounting accessories shall be provided as required by tower
manufacturer.
2.1.3.8
Semi-Frangible Supports
Lights supported more than 12 m 40 feet above the ground shall have a
two-element structure, the lower element being a rigid structure and the
upper element being a 6.1 m 20 foot LIR structure in accordance with FAA
E-2702.
2.1.4
Wire and Cable
Conductors shall be copper except as otherwise indicated.
2.1.4.1
Conductor Sizes
**************************************************************************
NOTE: Refer to Article 310-5 of NFPA 70 for minimum
conductor sizes. Require insulation thickness for
28 kV and 35 kV cables to be in accordance with AEIC
SECTION 16526A
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