(e) Dining and Recreation Areas: Sufficient lighting to provide a
minimum 53.8 lux (5 foot candles) illumination to exit ways
(f) Generator Set Location: Task illumination and selected receptacles
(g) Elevators: Cab lighting, controls, intercom, signal systems, and
elevator machine room lighting
4.7.2 CRITICAL BRANCH
This system shall supply power to the selected functions listed in NFPA
70 and 99:
NOTE: Arrange items (a) through (h) for delayed automatic connection to
the alternate power source.
(a) Patient Care Areas: Task illumination and selected receptacles
(b) Medication Preparation Areas: Task illumination and selected
receptacles
(c) Pharmacy Dispensing Areas: Task illumination and selected
receptacles
(d) Nurses' Station: Task illumination and selected receptacles
(e) HVAC systems, including exhaust for airborne infectious isolation
rooms
(f) Sump pumps and other equipment, if required, to operate for the
safety of major apparatus and associated control systems and alarms
(g) Smoke control and stair pressurization systems
(h) Kitchen hood supply and/or exhaust systems, if required, to operate
during a fire in or under the hood
NOTE: Items (i) and (j) shall be arranged for delayed-automatic or
manual connection to the alternate power source.
(i) Heating Equipment for General Patient Rooms: Heating of general
patient rooms during disruption of the normal service may not be
required under certain conditions. See NFPA 99 for additional
information.
(j) Elevator Service: In instances where interruptions of power would
result in elevators stopping between floors, throw over facilities
shall be provided to allow temporary operation at any elevator for the
release of passengers.
NOTE: In addition to the above equipment and devices, connect the
following items (k) through (o), which are "above code" requirements,
4-9
ELECTRICAL DESIGN MANUAL
EMERGENCY ELECTRICAL POWER SYSTEMS
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