to the Critical System. Arrange these items for delayed-automatic
connection to the alternate power system.
(k) Nurse Call System
(l) Patient Bedrooms: Bathroom light, an alcove or lavatory mirror
light, night light, and one receptacle per bed wall
(m) Electrical Rooms and Closets: 50 percent of lighting and one
receptacle
(n) Telephone Equipment Rooms and Telecommunications Closets: 50
percent of lighting, all receptacles and telephone equipment
(coordinate room names with Chapters 7 and 8)
(o) Mechanical Rooms: Task illumination and one receptacle
4.7.3 ALTERNATE SOURCE OF POWER
The alternate source of power shall consist of a diesel engine-driven
generator set.
4.8 ESSENTIAL ELECTRICAL SYSTEM FOR OTHER HEALTH CARE FACILITIES
The Essential Electrical System for other health care facilities shall
comply with the Type 3 system as defined in NFPA 99. If electrical life
support equipment is required or critical care areas are present in the
facility, the essential electrical system shall comply with the Type 1
system as defined in NFPA 99. If a Type 1 system is required, connect
the functions/items listed above in Article 4.6 to the essential
electrical system. Refer to VA Design and Construction Procedures (PG-
18-3) "National Disasters Non-Structural Resistive Design."
4.8.1 TYPE 3 LOADS
The Type 3 Essential Electrical System shall supply power for the task
illumination and limited power service that is related to the safety of
life and that is necessary for the safe cessation of procedures in
progress.
4.8.2 ALTERNATE SOURCE OF POWER (TYPE 3)
(a) The alternate source of power for Type 3 loads system shall either
be a generator, battery system or self-contained battery integral with
the equipment.
(b) The alternate source of power shall be separate and independent of
the normal source and shall have a capacity to sustain its connected
loads for a minimum of 1 hours after loss of the normal source.
(c) In the event of a failure of the normal power source, the alternate
source of power shall be automatically connected to the load within 10
seconds.
4-10
ELECTRICAL DESIGN MANUAL
EMERGENCY ELECTRICAL POWER SYSTEMS
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