UFC 4-171-05
1 January 2005
with change 25 October 2006
3-10.2.9 Verify the need for security lighting for POV parking area with the Tenants and
also the local municipality or Government installation. \ POV parking area light level
shall be 0.1 foot candles average./2/
3-10.2.10 Outdoor GFCI receptacles with weatherproof covers should be provided.
3-10.3
Interior Electrical
3-10.3.1 Interior Electric Power Distribution
3-10.3.1.1 Buildings should be served from main switchboards in the electrical rooms
at 480/277 volt, 3-phase, 4-wire for lighting, power and mechanical loads. DEPMED
should be provided with 208/120 volt, 3-phase, 4-wire power supply.
3-10.3.1.2 Verify and coordinate the size of the main electrical room and closets with
the architect.
3-10.3.1.3 Conductors for feeders should be sized to prevent a voltage drop
exceeding 3 percent at the farthest outlet of power, heating, and lighting loads, or
combinations of such loads and where the maximum total voltage drop on both
feeders and branch circuits to the farthest outlet does not exceed 5 percent, should
provide reasonable efficiency of operation.
Figure 3-12
3-10.3.1.4
The main switchboard and the distribution
USARC, Camp
panels should have circuit breakers. Combination starters
Parks, California
should be provided with disconnect switches and breakers to
serve motors in HVAC equipment. Branch circuit panels should
be circuit breaker panelboard type with plug-in breakers.
3-10.3.1.5
Interior conductors should be type
THHN/THWN or THW conforming to UL83 or RHW conforming
to UL44. All conductors should be copper. All conductors should
be routed in conduit. Minimum conductor size should be #12
AWG, except conductors for fire alarm system should be #16
for initiation circuits. A separate green ground conductor, size
per NFPA 70 Article 250 "Grounding," should be installed in all
conduits containing receptacle and lighting circuits, and should be installed in all feeders
from main switchboard to panelboards and motor/equipment.
3-10.3.1.6 The main electrical service switchboard ground bus shall be connected to
a Grounding Electrode System in accordance with NFPA 70, Article 250 "Grounding".
The computer room grounding and equipment should be connected directly to the
building service ground.
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