Building Maintenance Technician how-to
How to Replace a Light Switch Safely
Simple electrical repairs are safe only when power is off and verified.
Quick answer
Simple electrical repairs are safe only when power is off and verified. In short: turn; test; remove, then complete the remaining steps below.
Step by step
Turn off the breaker and lock it out if possible.
Test the switch with a non-contact tester to confirm power is off.
Remove the cover plate and switch, noting wire positions.
Connect wires to the new switch, including the ground.
Fold wires neatly, mount the switch and replace the plate.
Restore power and test.
Safety reminders for building maintenance technicians
- Turn off and verify power before electrical work
- Use ladders correctly and keep three points of contact
- Follow lockout/tagout for equipment
- Wear gloves and eye protection with chemicals and tools
Key terms
Work order · Preventive maintenance · Make-ready · GFCI · Breaker · P-trap: see the full building maintenance technician glossary.