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How to Wire a Three-Way Electrical Switch

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    • 1). Turn off the power to the circuit you are working on at the distribution panel. Confirm the power is off, at the wires, with a non-contact voltage detector.

    • 2). Connect the source power wire (black) from the distribution panel to the bottom right terminal on the first switch. Back the terminal off with a screwdriver. Wrap the wire around the connection and tighten the terminal back down.

    • 3). Run a 14/3 gauge wire from the first switch to the second switch.

    • 4). Strip 1/2 inch of insulation off all of the wires with the wire strippers.

    • 5). Connect the two white wires at the first light switch by twisting them together with pliers and installing a twist-on wire connector on top.

    • 6). Connect the black wire from the 14/3 wire to the top right terminal on the first three-way switch.

    • 7). Connect the red wire from the 14/3 wire to the top left terminal on the first three-way switch.

    • 8). Fasten the black wire from the other end of the 14/3 wire to the top right terminal on the second switch. Connect the red wire from the 14/3 wire to the top left terminal on the second switch.

    • 9). Connect the black wire, which powers the light, to the bottom right terminal on the second switch.

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      Fasten the white wire from the 14/3 wire to the white wire for the light by twisting the two together with pliers and installing a twist-on wire connector on top.

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