I am looking at a 2 gang light switch that looks miswired by the house builder. Can anyone tell me how to correct this please? I confirmed the 2 red wires are live. The earth wires are not connected to anything, which seems risky because they could potentially make contact with something. One earth wire is in the photo, the other one is in the wall box.
Miswired light switch
- Thread starter DiyNutJob
- Start date
Whats wrong with it?
I cant see the connections on the left switch
I cant see the connections on the left switch
Well, left switch has neutral at top and live at bottom. But, the right switch has live at top and neutral at bottom. Doesn't that mean one of the switches allows live to reach the bulb even after switch off?
Does it work?
The blacks arent neutrals.
The blacks arent neutrals.
Yes, it works. I just know the reds are live. The switches each connect to a separate cable comprising red, black, and earth.
The reds and the blacks are both live, ones permanent ones switched.....the blacks should have a red sleeve on.
With the switches off, the black wires don't light up the neon tester, only the reds do. There is red sleeve for the left black. As you can see, no sleeve on the right one.
Even with the switch on?
What do the switches do? What are you trying to do? Whats the problem?
I am not trying to do anything. I am trying to work out if it's wired properly, and trying to understand why the red wires have different positions.
If switch is on, then black is connected to the corresponding red and lights up neon.
Oh ok, it wouldnt matter which way round the red and blacks are connected, the switch is just joining them together to take the live to the light.
It is a bit odd that it seems to ne wired in FP200 cable....thats usually used for fire alarms or emergency lighting maybe.
This might be something similar to what you have, its called 3 plate wiring.
Yes, no neutral at the switch in your case.
Thanks. I don't deal with electric frequent enough to come across this before. So, the conclusion is the wiring is fine.
You say the earths aren't connected,.maybe connect them to the back box if theres a terminal or put them into a connector block.
Im still not sure why that type of cable has been used.
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