76 Publication 2100-IN012C-EN-P - April 2009
Chapter 7 Final Check List Before Energizing
d. Check that conduit and cabling are well supported.
For incoming line compartments, 2.0 space factors, 26 in.
(660.4 mm) or less, the incoming cables should be firmly
secured halfway between the top of the section and the
incoming line compartment terminals. In a full section (6.0
space factor) incoming line compartments the cables should
be braced every 12 in. (305 mm); if the system’s available
short circuit current is above 42,000 A but less then 65,000 A
rms symmetrical. Above 65,000 A rms symmetrical available
current bracing should occur every 6.5 in. (165 mm). This
bracing is in accordance with the Underwriters Laboratories
(UL) listing and is necessary to withstand forces resulting from
high fault currents. For information on cable bracing methods,
see Chapter 3
of this publication.
e. Check the integrity of all field connections.
Recommended torque values not found on individual devices
can be found on the unit wiring diagrams.
f. Check field wired connections made to the MCC for
agreement with wiring diagrams and verify that proper
spacings between adjacent phases and/or phases to ground
are being used. Refer to page 84
for the minimum electrical
spacing requirements.
7. Check that the voltage and horsepower ratings on the motor
correspond with the MCC unit ratings.
8. Check that the overload relays or heater elements are selected,
installed and/or adjusted to relative full load current shown on
the motor rating nameplate.
9. For applications requiring power fuses, install the fuses in the
fusible switches in accordance with the NEC application
requirements.
Refer to CENTERLINE Motor Control Centers Power Fuses
Product Data,
publication 2100-TD003 for fuse information. Do
not apply grease or NO-OX-ID to fuse ferrules. All fuses
must be completely inserted in the fuse clips. Recommended
torque values for fuse clamp screws can be found on the unit
wiring diagram. Verify that all fuses fit each application.
10. For circuit breaker applications, verify that the circuit breakers
are in accordance with NEC application requirements, and have
correct ampacity and trip settings.
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