Circuit Breaker Wiring Diagrams - Do-it-yourself-help.com . This circuit breaker wiring diagram illustrates installing a 20 amp circuit breaker for a 240 volt circuit. The 12/2 gauge cable for this circuit includes 2 conductors and 1 ground. The white wire is used for hot in this circuit and it is marked with black tape on both ends to identify it as such. Double Pole Circuit Breaker Wiring Diagram Free Wiring Diagram . Double Pole Circuit Breaker Wiring Diagram - Collections Of 2 Pole Mcb Wiring Diagram Best Double Pole toggle Switch Wiring. Single Pole Circuit Breaker Wiring Diagram New Double Pole. Wiring Diagram Gfci Breaker New Double Pole Mcb Wiring Diagram Fresh. Circuit Breaker Panel Wiring Diagram with the Distribution Best.