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Electrical Circuits

Electrical Panel and Circuit Wiring Diagram

Electrical Panel

120 V

Neutral

240 V

A & B

phases

Two pole

circuit breaker

for electric oven, dryer and/or air conditioner

Ground bar

Full website

Circuit diagram

These diagrams show a typical circuit path from the power company through the main electrical panel and to the outlets (light sockets, switches, and receptacles).

120V A&B Phase

From power company

Neutral

Electric meter

Ground and neutral are connected together

in one location only, at the neutral point either at the power company transformer or in the main electrical panel.

The potential difference between the A phase and B phase is 240 volts.

Main breaker

Neutral

bar

Electrical Panel Diagram

NM cable

Electrical Panel

A phase

power bus

To ground

B phase

power bus

Ground