Installing a Leviton Decora smart switch safely requires turning off the main electrical breaker and verifying dead circuits with a voltage tester. Remove the old switch, unspool the wires, and identify the ground, neutral, line, and load conductors. Connect the green switch wire to ground, the white switch wire to the wall box neutral bundle using a wire nut, the black line wire to hot power, and the remaining black wire to the light load. Secure all connections, tuck wires neatly into the box, mount the switch, snap on the faceplate, and restore breaker power. Verification: Test manual paddle actuation to confirm the light illuminates steadily and verify the LED indicator glows.
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