How To Replace a 2 Gang (Double) Light Switch

Summary

This video provides a step-by-step guide on how to replace a two-gang switch, specifically using a 600 series PDL switch. It covers key steps such as turning off the power at the circuit breaker, removing the cover, unscrewing the switch, and ensuring the correct termination of cables. The tutorial emphasizes safety, checking for proper connections, and testing the new switch once installed. With clear instructions on handling the wiring and ensuring secure connections, this video is a practical guide for anyone looking to replace a two-gang switch.

Takeaways

• 😀 Always start by removing the cover of the switch, being cautious of any paint around the edges.
• 🔌 Before touching any cables, ensure the power is turned off. This can be done by turning off the main switch or the lighting circuit breakers.
• ⚡ Always test for power after turning off the breaker, using a meter to check that the circuit is de-energized.
• 🔧 To replace the switch, ensure you are working with the same type (e.g., 600 series PDL) for a seamless fit.
• 🛠️ Use a screwdriver to unscrew the two screws from the flush box holding the switch in place.
• 🔌 It's important to check the termination of cables before reusing them—cutting and folding any oversized wire for proper connection.
• 🔩 When reconnecting, make sure the screw terminals tighten firmly around the copper of the cable to ensure a secure connection.
• 🔧 During the disconnection process, be aware that some wires may be twisted between the top and bottom terminals; carefully undo and check them.
• ⚡ For older switches, you may find that there is no earth wire connected—be mindful of this and check all terminals for proper wiring.
• 🛠️ After replacing the switch, screw it back into the wall, ensuring the switch is level before securing it in place.
• 🔌 After everything is reconnected, flip the breakers back on and test the switch to confirm both switches are functioning properly.

Q & A

What is the first step in replacing a two-gang switch?

The first step is to remove the cover plate from the existing switch. Be cautious, as paint may have been applied around the edges, which can make it tricky to remove. A knife or screwdriver can be used to carefully peel it off.

Why is it important to turn off the power before working with the switch?

Turning off the power is essential for safety. If the power isn’t switched off, there’s a risk of electrical shock while working with the wiring. You can turn off the power by either flipping the main switch or the lighting circuit breakers.

How can you double-check that the power is off before starting work?

You can test the power using an earth cable. Connect one end to the common (neutral) terminal and the other to the earth terminal. If the meter shows zero volts, the power is safely off.

What should you do after removing the switch from the flush box?

After removing the switch from the flush box, unscrew the wires from the old switch. It’s important to take note of how the wires are connected so that you can replicate the same setup on the new switch.

How should you handle damaged or oversized terminals on the wires?

If you encounter damaged or oversized terminals, trim the end of the wire and fold it over to ensure a proper connection. This will make it easier to insert the wire securely into the terminal.

How can you test that the new wiring is secure before reassembling the switch?

Once the wires are connected to the new switch, perform a pull test to ensure the connection is secure. If the wire doesn’t come loose when pulled, the connection is solid.

Why is it important to check the neutrals and earths when replacing the switch?

Checking the neutrals and earths is important because older switches may have improper or loose connections. Ensuring these are correctly terminated helps maintain safety and proper functioning of the switch.

What should you do if the neutrals and earths are not properly connected?

If the neutrals and earths are not properly connected, re-terminate them securely. You can use a connector to ensure that the wires are correctly and safely joined together.

How do you reassemble the switch once all the wires are connected?

Once all the wires are securely connected, screw the new switch back into place, ensuring it is level. Afterward, reattach the cover plate.

What is the final step to verify the switch replacement was successful?

The final step is to turn the breakers back on and test the new switch. Ensure that both switches are working properly by flipping them and checking that the lights respond correctly.