NOTE: Insert the following into Section 16402,
"Interior Distribution System."
"HANGAR DOORS: Provide field wiring [and trolley
duct installation] for hangar doors under this
section in accordance with door manufacturer's
written instructions, drawings and diagrams, and
NFPA 70 and NEMA ICS 1. Provide conduit, wiring,
boxes, cables, devices, and accessories under this
section. If permanent electrical power is not
available when door installation is complete,
provide temporary power for testing and adjusting
doors for proper operation. [Trolley ducts will be
furnished by door manufacturer and installed under
this section in accordance with door manufacturer's
approved drawings.] [Draped or festooned cables or
cable reels shall be provided under this section.
Cable shall be extra-flexible Type SD, and shall
have a spring-loaded, automatic take-up reel,
coil-cord, draped cable, or equivalent device.] [as
indicated.]"
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The door manufacturer shall provide the proper electrical equipment and
controls built in accordance with the latest NEMA standards. Equipment,
control circuits, and safety edge circuits shall conform to NFPA 70. Where
located 450 mm 18 inches or less above the floor, they shall be
explosion-proof as defined in NFPA 70, Article 513. Manual or automatic
control devices necessary for motor operation of the doors shall be
provided, including push button stations, limit switches, combination fused
disconnect switches and magnetic reversing starters, control circuit
transformers, relays, timing devices, warning devices, and trolley ducts
with collectors or trolleys.
2.3.9.1
Trolley Ducts
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NOTE: Individually motor-operated doors and
floating group doors should always be provided with
a trolley duct system to bring power to door leaves.
Anchored group doors, if opening width is not
excessive, can be equipped with draped or festooned
cables or cable reels. If opening width exceeds 36
meters 120 feet, a trolley duct system should be
used. Trolley duct systems should be specified to
be furnished by door manufacturer but installed
under Section 16402, "Interior Distribution System"
in accordance with door manufacturer's drawings.
Only door manufacturer is properly qualified to know
where to place trolley duct so there is adequate
clearance and noninterference.
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Provide one or more runs of trolley duct as required for the door system
provided. Ducts shall have solid copper conductors in a protective steel
[or polyvinyl chloride] housing. Locate ducts as shown on door
manufacturer's drawings. Provide adequate clearances in the top guide
system for the ducts.
SECTION 08342
Page 20
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