Double pole circuit breaker wiring diagram
A double pole circuit breaker is a type of electrical circuit breaker that is used to control two separate circuits or phases of a three-phase electrical system. Here is a wiring diagram for a double pole circuit breaker:
Double Pole Circuit Breaker Wiring Diagram
Note: This diagram is for a 3-phase, 4-wire system (3-phase, 4-wire, 120/240V).
Components:
- Double pole circuit breaker (DPNB)
- 3-phase, 4-wire power source (e.g. 3-phase, 4-wire, 120/240V)
- 3-phase, 4-wire load (e.g. 3-phase motor, 3-phase lighting)
Wiring Diagram:
Phase A:
- Power source (L1): Black wire
- Load (L1): Black wire
- DPNB (A): Black wire
- Neutral (N): White wire
Phase B:
- Power source (L2): Red wire
- Load (L2): Red wire
- DPNB (B): Red wire
- Neutral (N): White wire
Phase C:
- Power source (L3): Blue wire
- Load (L3): Blue wire
- DPNB (C): Blue wire
- Neutral (N): White wire
Grounding:
- Grounding wire (G): Green wire
- Grounding bus: Green wire
Notes:
- The double pole circuit breaker (DPNB) is connected to the power source and the load.
- The DPNB has two poles, each controlling one phase of the 3-phase system.
- The neutral wire (N) is connected to the grounding bus and the grounding wire (G).
- The grounding wire (G) is connected to the grounding bus and the grounding electrode (if present).
- The grounding bus is connected to the grounding electrode (if present).
Operation:
- When the DPNB is closed, the power source is connected to the load, and the load is energized.
- When the DPNB is opened, the power source is disconnected from the load, and the load is de-energized.
- The DPNB can be used to control the flow of current in each phase of the 3-phase system independently.
Safety Considerations:
- Always follow proper safety procedures when working with electrical systems.
- Ensure that the DPNB is installed and wired according to the manufacturer's instructions and local electrical codes.
- Verify that the DPNB is properly rated for the load and voltage of the system.