How Do You Install a Transfer Switch?

To install a transfer switch, install the transfer switch panel, and connect it to the circuit breaker with wires and a conduit. You need a manual transfer switch, flanged inlet box, 30-amp circuit breaker, wire nuts, a flexible 3/4-inch conduit and conduit connectors to complete this project.

  1. Turn off the power

    Turn off the main power. Establish the transfer switch panel next to the home service panel with a conduit.

  2. Attach the wires

    Connect a cable to the two panels. Attach the white wire to the white bar and the ground wire to the ground bar of the transfer switch and service panels.

  3. Connect the circuit breaker

    Set up a 30-amp circuit breaker next to the service panel. Connect the red and black wires from the circuit breaker cable. Connect the service panel bus taps to the breaker, and attach the other end of the black and red wires to the "From power lines" section of the transfer switch panel.

  4. Determine the wattage for appliances

    Calculate the amount of wattage that the appliances need. Start-up power should be used for a 20-percent allowance calculation.

  5. Wire the circuit breaker

    Remove the black wires of the circuit breaker. Extend the writing to the circuit breaker with wire nuts to reach the transfer switch panel with a conduit.

  6. Install the inlet box

    Check to see if the transfer switch panel contains a 30-amp flanged inlet connector. If not, install the connector by making a hole in the wall next to the generator. Install the connector by screwing it to the wall, and make the necessary wire connections.

  7. Connect the cables

    Attach the transfer switch cable to the neutral and ground wires. Connect the red and black wires to the "From generator" connectors.

  8. Make the final connections

    Place a positive-twist lock on the generator, and add a negative-twist lock to make a connection between the transfer switch panel and the flanged connector. Attach the other colored wires to the appropriate terminals.