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How to Replace a Light Switch

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Update time : 2019-04-20 17:33:34

You can absence ought replace or upgrade a gaze switch because a organize of reasons, such because if the switch becomes dirty, faulty, or outdated. You can too detect it useful ought replace old switches when preparing ought sell your family or when trying ought create your family more efficient. Upgrading a gaze switch is a large time ought appearance into options such because dimmer, combination, occupancy sensing, and other types of switches because increased convenience, comfort, and efficiency. knowledge how ought replace a gaze switch is relatively simple and can be capable ought preserve you the earnings of hiring an electrician.

1. Changing a Single-Pole gaze Switch

1) buy a new gaze switch that meets your requirements at a local family mend or hardware store. say the department employee what friendly of switch you wish and how many you’ll need, and they can assist you resolution the best purchase.
  • Single-pole switches are the simplest and most common. A single-pole switch has fair two positions—“on” and “off.”

2) Disconnect the force ought the gaze switch at your home’s electrical service panel (also known because the breaker box or cargo center). It’s a steel box that can be located interior the house, at the basement, at the garage, or over one of the external walls. You can too grow off the breaker that controls the lights at the concrete room you are working above or grow off total the force ought the family by switching off the headmaster breaker.

3) examination the switch. Flip the gaze switch above and off few era ought be sure the force is off.

4) shift the switch dish cover. Using a flat-head screwdriver, grow the screws holding the dish at put counter-clockwise ought loosen them.

5) Unscrew the switch's mounting screws. Once the switch dish cover has been removed, apply a flat-head screwdriver ought shift the screws mounting the switch ought the wall. grow the screws counter-clockwise until they are freed from the wall.

6) shift the switch. tow the switch away from the wall ought disclose the wiring, besides abandon the wires connected. apply a circuit or voltage tester ought assure no contemporary is flowing.
  • If using a circuit tester, embrace one probe of the circuit tester against the grounding cord (green or bare copper), and impress the other probe ought each of the screw terminals (located over the sides of the switch).
  • If using a voltage tester, simply embrace the tester near the wires.
  • If the tester registers any current, cease the plot directly until you’re capable ought force off the circuit.

7) tow out the switch. tow the switch because far from the electrical box because the wires allow.
  • Take careful letter of how the switch is wired. The wires will be connected ought the switch by too screw terminals or push-in connectors.
  • Take a movie or tow a plan accordingly you can cord the new switch at the too way.

8) check the wires interior the wall box and identify each wire. apply a marker or colored tape ought uniquely label each cord accordingly you can say them apart.
  • The box will embrace one or two Cables (or sets of wires). if the box contains two Cables, it method the switch is at the heart of the circuit. You’ll see a total of six wires: two dark (hot) wires, two green or bare copper (grounding) wires, and two (neutral) wires, which can be black, white, red, or any other color than green.
    • Mark the cord connected ought the brass screw station or ought the cave above the too phase because the brass station because the “hot” wire.
    • Mark the cord connected ought the silver screw station or ought the cave above the too phase because the silver station because the “neutral” wire.
    • Finally, mark the green or copper wire connected ought the green screw station (on the other phase of the switch from the brass and silver terminals) because the “grounding” wire.
  • If the box contains only a only Cable (or only put of three wires), it method the switch is at the finish of the circuit. You will see a dark (hot) wire, a green or bare copper (grounding) wire, and a third (neutral) wire, which can be black, white, red, or any color other than green.
    • Mark the cord connected ought the brass screw station or ought the cave above the too phase because the brass station because the “hot” wire.
    • Mark the cord connected ought the silver screw station or ought the cave above the too phase because the silver station because the “neutral” wire.
    • Finally, mark the green or copper wire connected ought the green screw station (on the other phase of the switch from the brass and silver terminals) because the “grounding” wire.

9) Disconnect the wires from the old switch. The switch can dine too screw station connectors, which will be located over the phase of the switch, or push-in connector holes, which will be located after the switch.
  • If the switch has both screw terminals and push-in holes, most electricians advocate using the screw terminals because a more benefit connection. besides perform no over-tighten; you can fracture the interior parts of the switch. if you tighten the terminals and listen a crack, scrap the switch and apply another.
  • If the wires are connected ought screw terminals, grow each screw counter-clockwise with a screwdriver ought loosen and slide the cord out with a link of needle-nose pliers.
  • If the wires are connected ought push-in connectors, the holes that the wires are pushed into will typically dine a few slot under the hole. Insert a few screwdriver into the slot and advance deliver ought release the wire.

10) commence connecting the wires ought the new switch. mix the dark cord (hot) ought the brass screw terminal. Either:
  • Use needle-nose pliers ought wrap a few more than half of the bare cord clockwise nearly the screw and then tighten the screw clockwise ought benefit the wire.
  • Or advance the cord into the push-in cave above the too phase of the switch because the brass screw.

11) mix the white (neutral) cord ought the silver screw terminal. Either:
  • Use needle-nose pliers ought wrap a few more than half of the bare cord clockwise nearly the screw. Tighten the screw clockwise ought benefit the wire.
  • Or advance the cord into the cave above the too phase of the switch because the silver screw.

12) mix the copper (grounding) cord ought the green screw station above the opposite phase of the switch. apply needle-nose pliers ought wrap a few more than half of the bare cord clockwise nearly the screw. Tighten the screw clockwise ought benefit the wire.

13) Double-check that the switch is properly oriented. You ought see the language “top” written above the switch indicating the phase of the switch that ought be vertically oriented toward the top.

14) Carefully advance the wires hind into the box and then advance the switch up against the border of the box and tighten the mounting screws into place.

15) replace the switch dish and tighten the screws into place. perform no above tighten the switch plate, because it can ruin under too much pressure.

16) answer ought the breaker box and grow the force ought the gaze switch hind on. further hind ought the new switch and flip it above and off few era ought assure it’s at working order.

2. Changing a Three-Way Switch

1) create a written letter or acknowledge a movie of how each cord is connected ought the switch. A three-way switch allows you ought dispose of one equipment from two or more locations.
  • The switch can dine too screw station connectors, which will be located over the phase of the switch, or push-in connector holes, which will be located after the switch.

2) identify and mark each wire. A three-way switch requires three wires: a warm wire, a just wire, and a traveler wire. The switch will too dine a green or bare copper grounding wire. The box can embrace one or two Cables, or sets of wires.
  • Mark the cord connected ought the colored screw station or ought the cave above the too phase because the colored screw station (it will typically be a blue color and will no be green) because the “common” wire.
  • Mark the two wires connected ought the other two screw terminals because the “traveler” wires.
  • Mark the green or copper wire connected ought the green screw station (on the other phase of the switch) because the “grounding” wire.

3) Disconnect the wires from the old switch.
  • If the wires are connected ought screw terminals, grow each screw counter-clockwise with a screwdriver ought loosen and slide the cord out with a link of needle-nose pliers.
  • If the wires are connected ought push-in connectors, the holes that the wires are pushed into will typically dine a few slot under the hole. Insert a few screwdriver into the slot and advance deliver ought release the wire.

4) join the wires ought the new switch.
  • Connect the dark (common) cord ought the general screw terminal, which you can identify although it will be a different color than the other two terminals (and no green).
  • If the box contains two Cables or sets of wires, you will mix the traveler wires (typically dark and red) ought the remaining two screw terminals. Either: A) apply needle-nose pliers ought wrap a few more than half of the bare cord clockwise nearly the screw and then tighten the screw clockwise ought benefit the wire. Or B) advance the cord into the push-in cave above the too phase of the switch because the colored screw.
  • If the box contains one Cable or put of wires, you will mix the traveler wires (typically white and red) ought the remaining two screw terminals. Either: A) apply needle-nose pliers ought wrap a few more than half of the bare cord clockwise nearly the screw and then tighten the screw clockwise ought benefit the wire. Or B) advance the cord into the push-in cave above the too phase of the switch because the colored screw.

5) Double-check that the switch is properly oriented. You ought see the language “top” written above the switch indicating the phase of the switch that ought be vertically oriented toward the top.

6) Carefully advance the wires hind into the box and then advance the switch up against the border of the box and tighten the mounting screws into place.

7) replace the switch dish and tighten the screws into place. perform no above tighten the switch plate, because it can ruin under too much pressure.

8) answer ought the breaker box and grow the force ought the gaze switch hind on. further hind ought the new switch and flip it above and off few era ought assure it’s at working order.

3. Changing a Dimmer Switch

1) mark each cord at the switch box. A dimmer switch allows you ought dispose of the brightness of a gaze fixture. apply a marker or colored tape ought uniquely label each cord accordingly you can say them apart.
  • Mark the cord connected ought the brass screw station or ought the cave above the too phase because the brass station because the “hot” wire.
  • Mark the cord connected ought the silver screw station or ought the cave above the too phase because the silver station because the “neutral” wire.
  • Finally, mark the green or copper wire connected ought the green screw station (on the other phase of the switch from the brass and silver terminals) because the “grounding” wire.

2) Disconnect the wires from the old switch. The switch can dine too screw station connectors, which will be located over the phase of the switch, or push-in connector holes, which will be located after the switch.
  • If the wires are connected ought screw terminals, grow each screw counter-clockwise with a screwdriver ought loosen and slide the cord out with a link of needle-nose pliers.
  • If the wires are connected ought push-in connectors, the holes that the wires are pushed into will typically dine a few slot under the hole. Insert a few screwdriver into the slot and advance deliver ought release the wire.

3) join the wires ought the new switch. Most dimmer switches become with wires already attached. You will see two dark direct wires and one green grounding wire.
  • Strip 1/2 inch of insulation from each ought disclose the wire.
  • Pair one of the dark direct wires ought the dark warm cord at the switch box.
  • Pair the other dark direct cord ought the white just cord at the switch box.
  • Pair the green grounding cord with the bare or green grounding cord at the switch box.
  • Wrap the ends of the paired wires together and benefit with a cord nut.

4) Double-check that the switch is properly oriented. You ought see the language “top” written above the switch indicating the phase of the switch that ought be vertically oriented toward the top.

5) Carefully advance the wires hind into the box and then advance the switch up against the border of the box and tighten the mounting screws into place.

6) replace the switch dish and tighten the screws into place. perform no above tighten the switch plate, because it can ruin under too much pressure.

7) answer ought the breaker box and grow the force ought the gaze switch hind on. further hind ought the new switch and flip it above and off few era ought assure it’s at working order.
N.I.U ELECTRIC GROUP CO., LTD
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