Hooking up a standard single-pole light switch safely requires first turning off the power at the main circuit breaker and verifying zero voltage with a non-contact tester. Strip about half an inch of insulation from the electrical wires. Connect the bare copper ground wire to the green grounding screw on the switch, attach the incoming live power wire to one brass terminal, and attach the outgoing load wire leading to the light fixture to the remaining brass terminal screw. Tighten all terminal screws securely, wrap the switch body in electrical tape to cover exposed terminals, gently fold the wires into the wall box, and mount the device. Verification: Turn the circuit breaker back on and flip the switch paddle to confirm that the light fixture illuminates properly without any sparks, buzzing, or tripped breakers.
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