feet. The motor shall include automatic thermal overload protection. Each
pump shall have an internal magnetic float switch, stainless steel shaft,
bronze impeller, and cast iron motor housing and volute. The cable shall
be continuous and of a waterproof type with watertight plug of sufficient
length to include slack and allow connection to receptacle as shown.
2.1.14
Circuit Breakers and High-Voltage Switches
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NOTE: Circuit breakers and high-voltage switches
should normally be rated at 150 percent of the full
load current rating of the transformer or the device
protected. Do not use manually operated fuse
cutouts.
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Circuit breakers and high-voltage switches shall be NEMA AB 1 type or
approved by UL 489. Switchgear for use in manholes and underground vaults
shall be subway type. Cutouts shall be vaulted for [_____] volts, [_____]
amperes, [_____] kV BIL. Hermetically sealed cutouts shall be provided
with expansion chambers for full rating. Cutout shall be mounted on
galvanized steel junction boxes with bolted-on covers, unless indicated
otherwise.
2.1.15
Transformer, Substations and Switchgear
The transformer substations and switchgear shall be as specified in Section
16402 INTERIOR DISTRIBUTION SYSTEM.
2.1.16
Emergency Generator and Automatic Transfer Switch System
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NOTE: Sections UFGS-16410A, AUTOMATIC TRANSFER [AND
BY-PASS/ISOLATION] SWITCHES, UFGS-16263A,
DIESEL-GENERATOR SET STATIONARY 100-2500 KW, with
AUXILIARIES, and UFGS-16264A, DIESEL-GENERATOR SET,
STATIONARY 15-300 KW, STANDBY APPLICATIONS shall be
edited and modified as necessary to suit the
specific helipad installation. Helipad requirements
include the following. Emergency generator sets
shall be rated 0.8 power factor lagging, either
4160/2400 or 480/277 volts, 3-phase, 4-wire,
grounded wye, 60 Hz. Installations for OCONUS
usually require 50 Hz. Governor shall provide speed
regulation of 5 percent from no load to full load.
Provide manual voltage control, electromagnetic
interference suppression, batteries, battery
charger, and repair parts. Parallel operation and
remote control speed adjustments are not required.
Automatic transfer switch shall be specified for
ratings needed for the helipad lighting
installation. The generator and automatic transfer
switch system shall accomplish a complete transfer
to the emergency power supply within 15 seconds of
interruption of the normal power supply for Category
I helipads. Time delay to override momentary normal
source outages to delay all transfer switch and
engine starting signals shall be set at three
seconds. Where climatic conditions warrant, cold
SECTION 16525A
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