Projects

Replacing a Wall Switch

Project Overview

A standard wall switch – technically, a single-pole switch – is a snap to replace. There are just two screw terminals to worry about. (Some types may have a third screw. It's for a ground wire.) The most challenging part of this project is making sure you orient the new switch so you can see the word ON with the little lever pointing up.

Step 1

Remove the Mounting Screws

Remove the mounting screws holding the switch to the electrical box. Holding the mounting straps, carefully pull the switch from the box. Be careful not to touch any bare wires or screw terminals until you've tested the switch for power.

Step 2

Test for Power

Test for power by touching one probe of the circuit tester to the grounded metal box or to the bare grounding wire and touching the other probe to each screw terminal in turn. If the tester glows, there's still power entering the box. Turn off the correct circuit at the service panel before proceeding.

Step 3

Double-Check the Wire Connectors

Double-check the wire connections. The black wire should be on one brass terminal, and the white wire, marked with a band of black electrical tape to indicate that it's hot, should be on the other. Disconnect the wires from the terminals, and remove the switch. If the wires are broken or nicked, clip off the damaged portion using a combination tool. Strip the wires so there's about 3/4 inch of bare wire at each end.

Step 4

Connect the Circuit Wires

Connect the circuit wires to the proper screw terminals on the new switch. Tighten the screws firmly but do not over tighten; over tightening may strip the screw threads. Remember, never screw more than one wire to a terminal; use a pigtail connection instead.

Step 5

Remount the Switch

Remount the switch, carefully tucking the wires inside the box. Be careful not to break through the protective insulation on the wires when pushing them into the box. Reattach the switch cover plate, and restore power to the switch at the main service panel.

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Project Details

Skill Level: Beginner

Time: 1 hour

Before you start, read this »

Due to differing conditions, tools, and individual skills, The Home Depot® assumes no responsibility for any damages, injuries suffered, or losses incurred as a result of attempting to replicate any of the home improvement ideas portrayed in this website Before beginning any home improvement project, review it thoroughly to ensure you or your contractor can finish the project and if any doubts or questions remain, consult local experts or authorities. Because codes and regulations vary greatly, you always should check with authorities to ensure that your project complies with all applicable local codes and regulations. Always read and observe all of the safety precautions provided by any tool or equipment manufacturer, and follow all accepted safety procedures.

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