(7) Equipment in warehouse areas needed to preserve subsistence drugs
and X-ray film materials that may be subjected to damage from
infestation, humidity or temperature
(aa) Ventilation and control equipment for electrical equipment rooms
(bb) Ventilation, cooling and control equipment for elevator machine
rooms
(cc) Water and Sewage Treatment Plant: Lighting, receptacles and
equipment needed during emergency
4.6.3 ALTERNATE SOURCES OF POWER
The alternate source of power shall be one or more diesel-engine-
driven-generator sets.
4.6.4 DISTRIBUTION EQUIPMENT
(a) Do not locate the first level of distribution of the Essential
Electrical System, such as the generators and distribution panels, in
the same room with other power systems;
(b) Transfer switches shall be limited to 800 amperes maximum size and
located to provide the highest practicable reliability in service to
the load. This generally means minimizing the switch-to-load distance;
(c) All transfer switches shall include the maintenance-bypass option;
and an exercising control panel shall be incorporated so as to allow
testing of each remotely located transfer switch from a central
location, such as the generator room.
4.7 ESSENTIAL ELECTRICAL SYSTEMS FOR NURSING HOMES AND LIMITED CARE
FACILITIES
The essential electrical systems for nursing homes and limited care
facilities shall comply with the Type 2 system as defined in NFPA 99.
This system shall consist of two separate branches; Life Safety and
Critical. Refer to VA Design and Construction Procedures (PG-18-3)
"National Disasters Non-Structural Resistive Design" for requirements
in national disaster areas.
4.7.1 LIFE SAFETY BRANCH
This system shall supply power to the selected functions listed in NFPA
70 and 99:
(a) Illumination of means of egress
(b) Exit signs
(c) Alarm and alerting systems such as fire alarm and medical gas
systems
(d) Communication systems, if used during emergency conditions
4-8
ELECTRICAL DESIGN MANUAL
EMERGENCY ELECTRICAL POWER SYSTEMS
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