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Replace a Circuit Breaker

advanced
Open residential breaker panel with one breaker being removed
Inside the panel: breakers clip onto metal bars that carry power.
Safety first

Turn off the breaker and verify power is off before working. If you are not comfortable, hire a licensed electrician.

Step-by-step
1

Turn off the main breaker and remove the panel cover.

2

Verify the bus is de-energized where you will work; main lugs remain hot.

Non-contact voltage tester held against an outlet slot to check for power
Touch a non-contact tester to the outlet or wires. No light or beep means the power is off.
3

Disconnect the load wire from the old breaker.

4

Snap the old breaker out and install the new breaker of the same type and rating.

Diagram of a circuit breaker clipping onto a panel bus bar stab beside the neutral and ground bars
The breaker hooks on one edge and snaps onto the metal bar. Use the same brand and amp rating.
5

Connect the load wire and reinstall the panel cover.

6

Turn the main breaker on, then the new breaker, and test the circuit.

Pro tip for you

Panel work is high risk; only do this if you are experienced and confident.

Tools
  • multimeter
  • insulated screwdriver
  • flashlight
  • safety glasses
Materials
  • correct type/brand/size breaker