manufacturer regularly engaged in the manufacture of the product and shall
essentially duplicate items that have been in satisfactory utility type use
for at least two years prior to bid opening.
2.2
NAMEPLATES
Nameplates shall be provided to identify all protective devices and
equipment. Nameplate information shall be in accordance with NEMA AB 1 or
NEMA SG 6 as applicable.
2.3
CORROSION PROTECTION
Metallic materials shall be protected against corrosion.
Ferrous metal
hardware shall be zinc or chrome-plated.
2.4
MOTOR CONTROLS AND MOTOR CONTROL CENTERS
Motor controls and motor control centers shall be in accordance with NEMA
ICS 1, NEMA ICS 2, NEMA ICS 3 and NEMA ICS 6, and UL 508and UL 845.
2.4.1
Motor Starters
Combination starters shall be provided with [circuit breakers] [and]
[fusible switches] [and] [switches equipped with high-interrupting-capacity
current-limiting fuses] [as indicated].
2.4.2
Reduced-Voltage Starters
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NOTE: Reduced voltage starters will be required
when the locked rotor current of motors exceeds the
full-load rating of supply transformers or supply
conductors.
**************************************************************************
Reduced-voltage starters shall be provided for polyphase motors [_____] kW
([_____] hp) [_____] hpor larger. Reduced-voltage starters shall be of the
single-step autotransformer, reactor, or resistor type having an adjustable
time interval between application of reduced and full voltages to the
motors. Wye-delta reduced voltage starter or part winding increment
starters having an adjustable time delay between application of voltage to
first and second winding of motor, may be used in lieu of the reduced
voltage starters specified above for starting of motor-generator sets,
centrifugally operated equipment or reciprocating compressors provided with
automatic unloaders.
2.4.3
Thermal-Overload Protection
Each motor of 93 W (1/8 hp) 1/8 hp or larger shall be provided with
thermal-overload protection. Polyphase motors shall have overload
protection in each ungrounded conductor. The overload-protection device
shall be provided either integral with the motor or controller, or shall be
mounted in a separate enclosure. Unless otherwise specified, the
protective device shall be of the manually reset type. Single or double
pole tumbler switches specifically designed for alternating-current
operation only may be used as manual controllers for single-phase motors
having a current rating not in excess of 80 percent of the switch rating.
SECTION 16475A
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