UFC 3-535-01
17 November 2005
Fixture assembly must meet the requirements Underwriters Laboratories (UL) test and
approval requirements as stated in UL 844 for class 1, division 1, group D hazardous
locations as defined in NFPA 70. The fixture assembly will include a light fixture,
frangible coupling, power disconnect switch that will kill power if the frangible mount is
broken, and a junction box. As an alternative, use the light fixture assemblies and
associated wiring that are intrinsically safe and meet Underwriters Laboratories (UL)
test and approval requirements as stated in UL 913 for class 1, division 1, group D
hazardous locations as defined in NFPA 70.
8-6.6
Runway and Taxiway Signs
When operational requirements consider it necessary to install informational mandatory
guidance signs, see Chapter 5 for guidance. Runway and taxiway signs are designated
in two groups: mandatory signs are white letters on a red background, and information
signs are black letters on a yellow background.
8-6.7
Auxiliary Lighting
For auxiliary lighting such as floodlights, protective lighting and intensities, see
paragraph 10-4.
8-7
POWER REQUIREMENTS
Runway lighting systems will be supplied through interleaved series circuits served by
constant current regulators. The regulators are available in various load capacities and
output current values, and have brightness controls so that the light output can be
adjusted to suit the visibility conditions.
8-7.1
Circuit Criteria
The number and type of regulators required will be determined by the circuit length.
Address power losses from cable lengths to and from the lighting vault to the lights and
the isolation transformer loss when designing the lighting system.
8-7.2
Cable Connectors, Plug and Receptacles
See Chapter 13.
8-7.3
Cables
Cables used for series circuit. Will be No.8 or No. 6 AWG 1/C stranded copper, 5,000
volt, cross-linked polyethylene (XLP). See paragraph 13-8.7. and FAA AC 150/5345-7,
Specification for L-824 Underground Electrical Cable for Airport Lighting Circuits. Use
No. 6 AWG cable on all 20 ampere circuits.
8-7.4
Isolation Transformers
See paragraph 13-8.9 for information.
8-8
CONTROL REQUIREMENTS
The heliport lighting control system is an integral part of the control system for all
heliport lighting facilities. The function of this portion of the control system is to energize
and de-energize the selected runway lighting systems, and to control the brightness of
the lights. All lights will be controlled from the control tower and from the lighting
equipment vault. The circuits will be provided and connected as indicated in Figure 8-4,
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