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3.10.3.2.9 Consider an automatic dimming system utilizing dimming
ballasts in fixtures at spaces or portions of spaces where significant
daylighting can reduce artificial lighting requirements; consider spaces
such as lobbies, unit commons, unit storage, corridors, and assembly
hall when daylighting is provided.3.10.3.3 Power
3.10.3.3.1 All motors 1/2 HP and larger should be specified 3-phase
480 volts when available. Provide overload protection in the motor
starters and short circuit protection for the motor and its feeder.
Include single phase protection, also
3.10.3.3.2 Where 120V motors are required by code to have thermal
protection, manual thermal overload starters should be provided.
3.10.3.3.3 Disconnect switches should be provided for all motors and
equipment.
3.10.3.3.4 In branch circuit, feeder and service calculations, compute
receptacle loads at not more than 180 volt-amperes per outlet with
demand factors according to NEC Article 220.
3.10.3.3.5 All general purpose receptacles should be 20 amps,
NEMA WD 1. Ground fault circuit interrupter receptacles should be
provided for bathrooms, maintenance bays and outdoor receptacles.
Recessed floor outlets in the first floor and poke-through outlets on
second and third floor should be provided to connect freestanding
workstations in the open office areas. Provide multiple convenience
receptacles adjacent to desk locations in individual and shared offices.
3.10.3.3.6 Light switches should be 20 amp, 120/277 volt AC,
specification grade.
3.10.3.4 Special Requirements
cathodic protection or wrapping of ferrous metals as required.
3.10.3.4.2 Provide building lightning protection if the calculations
indicate that the facility lightning risk index (R) is above 3.0
(moderate) based on NFPA 780, Lightning Protection Code.
Coordinate lightning protection and grounding with information
systems requirements.
3.10.3.4.3 Power connections to any SCIF room should be provided
from a disconnect switch connected ahead of the main switch.
UFC 4-171-05
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