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. Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462 or local equivalent. This equipment must be installed and serviced only by qualified personnel. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on or inside equipment. Before performing visual inspections, tests, or maintenance on this equipment, disconnect all sources of electric power. Assume all circuits are live until they are de-energized, tested, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of backfeeding. Always use a properly rated voltage sensing device to confirm power is off. Handle this equipment carefully and install, operate, and maintain it correctly for it to function properly. Carefully inspect the work area and remove any tools and objects left inside the equipment. Replace all devices, doors, and covers before turning on power to this equipment. All instructions in this manual assume that the customer has taken these measures. 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.
Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462 or local equivalent.
This equipment must be installed and serviced only by qualified personnel.
Perform such work only after reading and understanding all of the instructions contained in this bulletin.
Turn off all power supplying this equipment before working on or inside equipment.
Before performing visual inspections, tests, or maintenance on this equipment, disconnect all sources of electric power. Assume all circuits are live until they are de-energized, tested, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of backfeeding.
Always use a properly rated voltage sensing device to confirm power is off.
Handle this equipment carefully and install, operate, and maintain it correctly for it to function properly.
Carefully inspect the work area and remove any tools and objects left inside the equipment.
Replace all devices, doors, and covers before turning on power to this equipment.
All instructions in this manual assume that the customer has taken these measures.

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).