Install a Branch Circuit Breaker

IMPORTANT: For cabinets with NQ and IP2X panelboards using branch circuit breakers with catalog prefix QO or QOB, the maximum continuous load* on any branch circuit breaker must not exceed 80% of the branch circuit breaker rating.

IMPORTANT: For cabinets with NF panelboards using branch circuit breakers with catalog prefix EDB and EGB, the branch connectors are restricted to no more than a combined circuit breaker current rating of 170 A. The maximum continuous load* on any branch circuit breaker must not exceed 80% of the branch circuit breaker rating.

Shut down the RPP, follow Shut Down the RPP.
Open the front door.
Turn the new branch circuit breaker to the OFF (open) position.
Install the new branch circuit breaker in an empty position on the panelboard:
- For QO type branch circuit breaker: Snap the wire terminal end of the circuit breaker onto the mounting rail and push inward until the plug-on jaws fully engage the branch connector.
- For QOB type branch circuit breakers: Snap the wire terminal end of the circuit breaker onto the mounting rail. Push inward until the circuit breaker connector is centered on the branch connector mounting hole. Engage the screw into the branch connector hole and tighten it to 2-2.4 Nm (18-21 lb-in).
- For EDB type branch circuit breakers: With the bolt-on connector end of the circuit breaker slightly elevated, insert the mounting foot into the slot in the phase cover. Rotate the circuit breaker down and back until the captive screw(s) align with the tapped holes in the circuit breaker connectors. Engage the screw into the branch connector hole and tighten it to 2.3-3.4 Nm (20-30 lb-in).
Route the load power cables through the top or the bottom of the cabinet.

Connect the load power cables:

Connect the ground cable to the ground terminal.
Connect the N cable to the N terminal.

Route the power cables through the current transformers for the new branch circuit breaker.

NOTICE
Risk of equipment damage Route the power cables carefully through or near the current transformer strip to avoid damaging the current transformers. Do not assemble forcefully as this will create mechanical stress or deformation to the current transformers. Failure to follow these instructions can result in equipment damage.

Connect the power cables to the new branch circuit breaker.

Panelboard 1.
Panelboard 2 (if present).

Start up the RPP, follow Start Up the RPP.
Configure the new branch circuit breaker via the display, follow Configure a Branch Circuit Breaker.