80459-641-01, Rev. 09

Energizing the MCC

DANGER
Hazard of Electric Shock, Explosion, or Arc Flash
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462.
  • This equipment must only be installed and serviced by qualified electrical personnel.
  • Turn off all power supplying this equipment before working on or inside equipment.
  • Always use a properly rated voltage sensing device to confirm power is off.
  • Replace all devices, doors, and covers before turning on power to this equipment.
  • Review the Pre-operation Checklist, ensuring that all items check out.
Failure to follow these instructions will result in death or serious injury.
NOTE: If an electrical fault is experienced, do not attempt to re-energize the MCC. Please refer to Maintenance After an Electrical System Event Has Occurred.

To energize the MCC:

  1. Review the Pre-operation Checklist before energizing.

  2. Turn off all downstream loads, including distribution equipment and other devices that are remote from the MCC.

  3. Verify that all barriers, doors, and covers are closed before energizing the equipment.

  4. Energize the equipment in sequence, starting with the main, the feeder units next, and then the motor starter units.

  5. With all barriers in place and all unit doors closed and latched, turn on the units with a firm, positive motion.

  6. After all disconnects are closed, loads such as lighting circuits, starters, contactors, heaters, and motors may be energized.

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