Attachment 1: Specifications - Metropolitan Washington Airports ...

DCA TERMINAL A IMPROVEMENTS (NEAR TERM)10 AUGUST 2012
TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN
RONALD REAGAN WASHINGTON NATIONAL AIRPORT
PROJECT DT1203
7. Flexible Conduit (Less than 2 feet): Liquidtight type, minimum size 1/2 inch. Shall be
AFC, or as acceptable to The Authority.
8. Flexible Conduit Connectors: Cast metal, clamp style and insulated type. Screw-in type
connectors are not acceptable.
9. Wireway: Hinged cover, baked enamel finish, size as required. Shall be General
Electric, Square D, Circle AW, or as acceptable to The Authority.
10. Conduit Supports:
D. Conductors:
a. Surface-mounted: 1-hole, malleable iron, hot-dip-galvanized straps. T & B,
Appleton, Steel City.
b. Pendant-mounted: For single units, 1/4-inch rod with pear-shaped hanger; for
multiple raceways or wireways, trapeze-type hanger with 3/8-inch rod, 1-5/8 inch
square performed channel and pipe clamps.
1. All conductors shall be copper and in accordance with NEC or Local Code requirements,
whichever are more stringent. Low voltage (less than 90 volts) control wiring shall be
installed in separate conduits and not combined with power or control (greater than 90
volts) wiring. Control wiring shall be installed in separate conduits and not combined
with power wiring. Control wiring shall be terminated, where necessary, in junction
boxes on terminal boards, make wire numbers on terminal strips. The term “conductor”
as used in these specifications shall be considered as any wire cord, cable, rod, buss, fuse,
or similar product designed for the transmission of electrical energy.
2. Conductors for Motor Control Only: Exterior to control panels, conductors shall be
Type THHN/THWN-2 for all wet and dry indoor locations and shall be Type XHHW-2
for outdoor locations. Conductors shall be 600-volt insulation, stranded copper,
Class “B” stranding, no solid conductors allowed. All power conductors shall be 12
AWG, minimum. All control wiring shall be No. 14 AWG, minimum. Grounding
conductors: #6 AWG and larger: stranded copper, bare soft drawn as required. #8 AWG
and smaller: stranded copper with green insulation.
3. Conductors Motor Control Only: Interior to control panels, conductors shall be
Type MTW, 600-volt insulation, stranded copper, Class “B” stranding, no solid
conductors allowed. Motor feeders shall be sized as required. All power conductors
shall be 12 AWG, minimum. Control wire shall be 14 AWG, minimum.
4. Conductors for All Area Except Motor Control: Conductors shall be 600-volt. Wiring
shall be run in conduit, except where specified or indicated otherwise, and conductors
shall not be less than No. 12 AWG except for control wiring in conduit, which may be
NO. 14 AWG and fire alarm wiring, which may be No. 16 AWG. Wire shall be
furnished in types to conform to the following:
a. Thermoplastic Type THWN (for fire alarm circuit only): Type THWN shall bear
Underwriters Laboratories approval. Conductors shall be solid. Wire shall meet
the requirement of IEEE/IPCEA Standards S-61-402 Copper.
b. Thermoplastic Type THHN/THWN-2: Type THHN/THWN-2 wire shall bear
Underwriters Laboratories approval. Conductors shall be stranded having
IEEE/IPCEA Class “B” stranding. Wire shall meet the requirements of
IEEE/IPCEA Standards S-61-402 Copper.
BAGGAGE HANDLING EQUIPMENT 34 77 16 - 48