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, CSA Z462, or local equivalent. This equipment must only be installed and serviced by qualified electrical personnel. Turn off all power supplying this equipment and follow lockout/tagout procedures before working on or inside equipment. Always use a properly rated voltage sensing device at all line and load fuse clips to confirm switch 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.

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 MCC 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 by moving the external operator handle with a firm, positive motion.

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