frangibly mounted on [steel stakes] [FAA AC 150/5345-42, Type L-867 bases].
For landing direction lights located in paved areas subject to aircraft or
vehicular surface traffic, the fixtures shall be FAA AC 150/5345-46, Type
L-852E with aviation yellow filters. These fixtures shall be mounted FAA
Type L-868 bases. These lights shall be energized from [6.6 ampere series
circuit through isolating transformers] [120/240 volt multiple circuit]
power source as required by the contract drawings. The isolation
transformers for series circuits shall be FAA AC 150/5345-47, Type
1-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.9.3
Approach Direction Lights
The approach direction lights emit white light to indicate the direction
for approach to the helipad. The fixtures shall be FAA AC 150/5345-46,
Type L-861 with aviation white globes. These elevated lights shall be
frangibly mounted on [steel stakes] [FAA AC 150/5345-42, Type L-867 bases].
For approach direction lights located in paved areas subject to aircraft
or vehicular surface traffic, the fixtures shall be FAA AC 150/5345-46,
Type L-852E without filters. These lights shall be mounted on FAA Type
L-868 bases. These lights shall be energized from a [6.6 ampere series
circuit through isolation transformers] [120/240 volt multiple circuit]
power source as required by the contract drawings. The isolation
transformers for series circuits shall be FAA AC 150/5345-47, Type
L-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.9.4
Helipad Floodlights
Helipad floodlights provide texture on the helipad surface at night. The
floodlight fixtures are as required in the contract drawings. These lights
shall be [mounted on FAA AC 150/5345-42, [Type L-867] [Type L-858] bases]
[[or] [as approved].] The lights shall be energized from 120/240 volt
multiple circuits.
2.9.5
Helipad Inset Lights
Helipad inset shall be FAA AC 150/5345-46, Type L-852E [with aviation blue
filters] [without filters]. These lights shall be mounted on FAA AC
150/5345-42, Type L-868 light bases. These lights shall be energized from
a [6.6 ampere series circuit through isolation transformers] [120/240 volt
multiple circuit] power source as shown on the contract drawings. The
isolation transformers for series circuits shall be FAA AC 150/5345-47,
Type L-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.10
HELIPAD LIGHTING, INSTRUMENT METEOROLOGIC CONDITIONS (IMC)
The IMC helipad lighting consists of perimeter lights, approach lights, and
landing direction lights.
2.10.1
Helipad IMC Perimeter lights
For IMC perimeter lights, shall be FAA AC 150/5345-46, Type L-861SE
elevated, medium-intensity, bidirectional fixtures with aviation yellow
filters. These lights shall be frangibly mounted on FAA AC 150/5345-42,
Type L-867 bases. These lights shall be energized from a [6.6 ampere
series circuit through isolation transformers] [120/240 volt multiple
circuit] power source as required by the contract drawings. [The isolation
transformers for series circuits shall be FAA AC 150/5345-47, Type L-830-4
6.6/6.6 amperes, 100 watts, 60 hertz.]
SECTION 16525A
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