A third neutral line is also brought to the circuit breaker or service panel. Each hot leg feeds alternate breakers to supply 120 V to their respective circuits. When 240 V are needed, a double ...

Read the instructions and wiring diagram that came with your new thermostat, and keep them handy throughout the next steps. Using a small screwdriver, remove the wires from the terminal block. Make ...

Electrical panel and wiring replacement costs. Generally, replacing an electrical panel will cost $521 to $2,096 on average, but it could cost more than $4,000.