Hooking up a Leviton Decora smart switch requires strict adherence to electrical safety protocols. First, turn off the power at the main electrical service breaker panel and verify zero voltage using a reliable non-contact voltage tester. Remove the existing wall plate and pull out the old switch. Identify the four required conductors: bare copper ground, white neutral bundle (typically found bundled inside the back of the electrical box), black line (hot) wire coming from the breaker, and black load wire leading to the light fixture. Connect the green wire to ground, the white wire to the neutral bundle using a wire nut, the black line wire to the switch's black lead, and the load wire to the switch's red lead. Secure all wire connectors tightly, wrap the switch body with electrical tape, fold the wires neatly into the box, screw the device into place, snap on the Decora wall plate, and restore power at the breaker. Verification: Check that the status LED flashes green to indicate setup mode and test manual paddle operation.
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