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Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
Chapter 7
Final Checklist Before Energizing
1.4.2 Is trained in the proper care and usage of protective equipment
such as rubber gloves, hard hat, safety glasses or face shields, flash
clothing, etc., in accordance with established safety practices.
Perform the Pre-energizing
Check Procedure
1. Remove all blocks or temporary holding means used for shipping all
component devices in the MCC.
2. Inspect the enclosure and units for damage.
a. If structural damage is present, contact MCC technical support a
t
1.440.646.5800 and follow the prompts to Allen-Bradley > Low
Voltage Motor Control Centers > Post Shipment Support.
b. If no structural damage is visible, verify the electrical spacings.
Refer to the tables starting on
page 91
for the required minimum
electrical spacings.
3. Check and verify that the MCC is properly installed, as described in
, and inspect and verify that it is level, supported, and
anchored.
4. For MCCs with the 100 ms arc-resistant rating, check that clearance
height is at least 12 in. (305 mm).
5. Check the integrity of the bus splice connections.
ATTENTION:
To ensure the safety of personnel performing the pre-
energizing check, make sure the MCC remote power sources are
disconnected and locked in the OFF/O position.
Use a voltmeter to verify that the MCC remote power sources are disconnected.
ATTENTION:
Power factor correction capacitors (PFCCs) must be applied
correctly. For application instructions refer to Power Factor Correction
Capacitors for Bulletin 2100 MCC Starter Units Application Techniques,
publication
. When PFCCs are connected to the motor circuit and
the start-up procedure requires the respective motors to be jogged, inched,
or bumped (rotation direction check), temporarily disconnect PFCCs. For
more information contact, Rockwell Automation LV MCC Technical Support at
1.440.646.5800 and follow the prompts to Allen-Bradley > Low Voltage
Motor Control Centers > Post Shipment Support.
ATTENTION:
Verify that motor acceleration times are within specific
application specifications.
Excessive starting currents and/or acceleration times can cause inverse time
circuit breakers, power fuses, overload relays, and other components to
overheat and/or shutdown equipment.