How to Wire a Breaker Circuit (with Pictures) - wikiHow MethodTipsWarningsThings Needed Switch off the main power switch. This should be located at the top of the breaker panel.Take the cover of the breaker box off.Use an electrical tester by putting the tip of one probe against the ground bus bar and the other against one of the screws of a circuit breaker. Connected to this screw should be a red, black, or blue covered wire. If you have properly turned off the power, there should be no signs of voltage.See all 16 steps on wwwhow Homeline Breaker Box Wiring Diagram Download | Wiring Mar 03, 2018Homeline Breaker Box Wiring Diagram Download - Wiring Diagram for 30 Amp Breaker Box Inspirationa Homeline Breaker. Wiring A Breaker Box Breaker Boxes 101 Pinterest. Homeline Breaker Box Wiring Diagram Awesome Wiring A Breaker Box. Square D Homeline 100 Amp 12 Space 24 Circuit Indoor Main Breaker.