Energizing the Switchboard

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Correct short-circuit conditions detected during the checkout procedures described in Pre-energizing Checkout Procedure. Qualified electrical personnel must be present when energizing this equipment for the first time. Follow the instructions in this section to energize the switchboard properly. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Correct short-circuit conditions detected during the checkout procedures described in Pre-energizing Checkout Procedure.
Qualified electrical personnel must be present when energizing this equipment for the first time.
Follow the instructions in this section to energize the switchboard properly.

Failure to follow these instructions will result in death or serious injury.

Make sure there is not a load on the switchboard when it is energized. Turn off all downstream loads.
Energize the switchboard in the following sequence:
1. Turn on all control power disconnects before energizing the switchboard. Refer to the record drawings supplied with equipment to see if control power disconnects are supplied.
2. Close any open doors and/or covers.
3. Close all main devices.
4. Close each branch circuit breaker or branch fusible switch.
5. Proceed to each panelboard and other downstream load.
After all overcurrent protective devices are closed, turn on all loads (for example, lighting circuits, contactors, heaters, and motors).