Publication 2100-IN012C-EN-P - April 2009 79
Final Check List Before Energizing Chapter 7
temperature, humidity, or dampness which may cause a
considerably lower insulation resistance reading. If the
insulation resistance values are below 1 MΩ (for example,
affected by dampness, temperature, or humidity) or the MCC has
been stored in a damp or humid area, we recommend that the
equipment be dried out. Dry out the motor cables by injecting a
low voltage current or by using space heaters.
Once the equipment is dry, repeat the insulation resistance test.
The minimum value for insulation resistance on a new
installation at startup or energizing is 1 MΩ. These readings may
be recorded in the Megger Reading Recording Table
. This table
allows for additional megger readings to be recorded during
regular maintenance periods.
19. Check that all unit latches are secure.
20. Close and latch all doors, making certain that no wires are
pinched.
21. Check that all section closing plates are in place.
Certain applications may have latch requirements different from those
provided. If you have questions regarding proper latching, 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. Refer to the following illustrations for
various latch placements.
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