Method for Replacing Aluminum Wiring

Turn the power off to the circuit you're working on.

Test the circuit wires with a multimeter to ensure no power is flowing. Set the multimeter to AC volts and place one probe on the tip of the black hot wire and the other probe on the white one. A reading of zero verifies the absence of power.

Cut the black aluminum hot wire in two with wire cutters.

Strip approximately 5/16 inch of insulation from the two black aluminum wires, using wire strippers.

Insert the stripped ends of the aluminum wires into the outer wire ports of the connector. Verify that the wires are fully seated within the connector.

Tighten the connector set-screws clockwise with a flat-head screwdriver until they're snug. Note the position of the screwdriver slot. Tighten the set-screws one full turn from this point. Do not overtighten them.

Strip 5/16 inch of insulation from the end of the new copper wire.

Insert the stripped end of the copper wire into the center port of the connector. Tighten the set-screw until it's snug. Check the position of the screw slot and tighten the screw one-half turn from this point

Close the connector cover.

Repeat Steps 2 through 9 for the white neutral, the ground wire and all other wire connections requiring replacement.

Install copper wires to all terminals previously connected with aluminum.