have a suitable metal or laminated plastic nameplate with white cut letters
at least 6.4 mm 1/4 inch high on contrasting backgrounds [identifying the
breaker unit and/or circuit number] [as shown on the drawings].
a. Busway Throat Compartment Type: Outgoing section shall consist of
an enclosure containing metering devices on the main secondary circuit
and connections from transformer terminals to suitable busway throats
provided for connections to busway installations entering [from above]
[as shown]. Connection to porcelain bushings shall be made with
flexible jumpers.
b. Dead-Front Distribution Panelboard/Switchboard Type: Outgoing
section shall be of the panelboard/switchboard type mounted integrally
with the transformer and shall consist of metering devices and main and
branch circuit breakers mounted in panelboard/switchboard enclosures.
Panelboards shall comply with NEMA PB 1. Switchboards shall comply
with NEMA PB 2. Molded-case and low-voltage power circuit breakers
shall comply with paragraph METERING AND PROTECTIVE DEVICES. Plug-in
type circuit breakers are not acceptable. Directories to indicate
loads served by each circuit shall be typed and mounted in holders
provided on panelboard doors behind protective coverings.
c. Metal-Enclosed Switchgear Type: [Outgoing section shall be of the
metal-enclosed drawout circuit breaker type, in accordance with IEEE
C37.20.1 and NEMA SG 6.] Low-voltage power circuit breakers shall
comply with the requirements of paragraph METERING AND PROTECTIVE
DEVICES.
d. Metering: The main secondary bus of each outgoing section assembly
shall include a watthour demand meter with the necessary instrument
transformers, and VT and CT test blocks. Metering shall be as
specified in paragraph METERING AND PROTECTIVE DEVICES.
e. Ground Fault Protection: Ground fault protection shall be provided
utilizing sensors of the zero-sequence type or by the residual
connection of phase and neutral current sensors. Ground fault settings
shall be [as shown] [as determined by the coordination study].
2.9.1.4
Nonintegral (Cable Compartment) Outgoing Section
**************************************************************************
NOTE: Specify cable compartment outgoing section
when the transformer will feed the nonintegral
low-voltage panelboard/switchboard/switchgear via
cables. The cable compartment is actually integral
to the transformer, but by using cables, the
substation is classified as "nonintegral."
**************************************************************************
A cable compartment shall be provided on the transformer for cable
connections as shown. Clamp type terminations for cables entering from
[below] [above] shall be provided for connection to the transformer
bushings. Clamp type cable terminations, suitable for [copper] [aluminum]
conductors, shall be provided [for the circuit sizes shown] [to match
2.9.2
Pad-Mounted Transformers
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SECTION 16375A
Page 31
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