MIL-HDBK-1191
located in the occupied zones adjacent to permanent structural
elements, stairs or elevators and should also be stacked vertically
from floor to floor.
19.4.4.3
Capacities for Flexibility. Capacities of major electrical
components such as main distribution panels and transformers shall be
based on the areas served, rather than specific use, to allow for
flexibility. Communications systems shall be designed in a similar
manner.
19.4.4.4
Electrical Secondary Distribution. Branch circuiting
should be routed through the distribution zone to allow for
modification with minimal disruption of the occupied zone. Cable trays
shall be used to distribute electrical systems wiring. Ground
continuity shall be provided throughout the cable tray system. Cable
trays shall be designed using conservative judgment and space shall be
dedicated in the distribution channels assigned to electrical services
for future cable trays. See Section 13: Fire Protection for plenum
rated cable requirements.
19.4.4.5
Communications Systems Distribution. Cable trays shall be
used to distribute communications systems wiring. Ground continuity
shall be provided throughout the cable tray system. Cable trays shall
be designed using conservative judgment and space shall be dedicated in
the distribution channels assigned to communications services for
future cable trays. See Section 13: Fire Protection for plenum rated
cable requirements.
19.4.4.6
Identification. Coded identification of electrical conduit
runs by voltage and function shall be provided. Circuit identification
for electrical wiring and system identification for communications
wiring shall also be provided.
19.4.4.7
Lighting. Fifty lux (five foot-candles) of lighting shall
be provided throughout the distribution zone. One hundred fifty lux
(fifteen foot-candles) shall be provided over access aisles, using
damage-resistant lighting fixtures. Egress lighting and exit signs
shall also be provided over access aisles and at distribution zone
exits. Switches shall be provided at each distribution zone entry and
exit. Providing all switches with timers to turn off distribution zone
lighting after a certain time interval should be considered.
19.4.4.8
Power. A pattern of electrical outlets shall be provided
in the distribution zone for portable tools and extension cords.
19.4.4.9
Telephones. A pattern of telephone outlets shall be
provided in the distribution zone for portable telephones. Telephone
outlets located adjacent to maintainable equipment should be
considered.
19.4.5
Systems Module Fire Protection Requirements. Refer to
Section 13: Fire Protection for fire protection requirements.
19.4.6
Systems Module Construction Time and Cost Considerations.
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