UFC 3 -520-01
June 10, 2002
6-4.6
Provide ground fault circuit interrupters (GFCI) for personnel protection and
GFP for equipment protection in accordance with NEC requirements .
6-4.7
Receptacles used in medical facilities must comply with NFPA 99, Health
listed for this purpose. Identify receptacles fed from the emergency system and indicate
the panelboard and circuit number supplying them.
6-4.8
Locking-type receptacles should be used where positive engagement of the
plug is required or where a strain on the portable cord can be anticipated.
6-4.9
Design three-phase power receptacles installed in hangars, aprons, and
ramps for supply of electrical energy to aircraft support equipment to fit the plug used as
the standard on the support equipment. Design receptacles for inserts with a metal
enclosure for wall or flush mounting, weather-tight, load rated, three-phase, four -wire,
six-pole. Design receptacles to provide an adjustable source of power for 240/416-
254/440-265/460 volt, 60-Hertz equipment with transformer tap adjustment, if required.
Use a phase rotation of ABC, clockwise, looking into the receptacle. Provide receptacle
enclosures with a means for attaching an internal grounding conductor.
6-4.10
Install receptacles in a floor or apron flush-mounted with an adjacent concrete
pad slightly mounded and slotted to permit drainage. Orient the slots in pavement to
avoid snowplow blades.
6-4.10.1 Utilize the receptacle enclosure for the pull or junction box. No other opening
or hand hole for this purpose can be constructed in the floor or apron.
6-4.10.2 Mount the contactor for the circuit, control relay, and control devices in a
single enclosure, installed on a wall of a hangar or at the rear of the apron, according to
clearance requirements. Wall-mounted receptacles can be installed as integral parts of
contactor enclosures. Contactor enclosures for wall -mounted receptacles can be of the
general-purpose type if they are mounted on interior walls, and they should be mounted
sufficiently high to be outside of hazardous areas.
6-4.11
Receptacles installed in office furniture should be considered in the facility
electrical layout planning. Depending on the office layout and design, either floor -
mounted receptacles or ceiling drops might be necessary to provide power to furniture
receptacles.
6-5
WIRING FOR TEMPORARY POWER AND LIGH TING.
6-5.1
Temporary electrical power and lighting wiring methods can be of a class less
than would be required for a permanent installation. Except as specifically allowed in
this section for temporary wiring, apply all other criteria for permanent wiring to
temporary wiring installations.
6-8
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