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Lighting question

Former Community Member over 5 years ago

So today I wanted to add another switch in a house.

The extra switch would need to now include an intermediate due to it being already 2wY.

now when I took the switches off, one switch the common has just a single sheath core, the L1 and L2 are a 2 core cable L1 being Red and L2 being black.

This is exactly the same in the other switch.

I thought this must mean there is a JB somewhere ? In the light fitting there is 3 T&E, and 1 single cable which goes into the lamp live!

I just can’t understand how this could be wired?

Any ideas?

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0 Legh Richardson over 5 years ago

IMO, The common of Sw1 goes to permenant live at the JB, the common from sw2 goes to the light switch live, via a JB, the feed to the JB and the neutral/switch line from the JB goes to the lamp.

You now need to break into the strappers that either run between L1 and L2 of the switches or connect into a JB. It should be reasonably easy if it uses the JB to connect the strappers. You'll need another JB or use a terminal box with at least 8 ways to rewire with two T&Es to the new intermediate Sw and so complete the circuit.

Legh
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0 Legh Richardson over 5 years ago

IMO, The common of Sw1 goes to permenant live at the JB, the common from sw2 goes to the light switch live, via a JB, the feed to the JB and the neutral/switch line from the JB goes to the lamp.

You now need to break into the strappers that either run between L1 and L2 of the switches or connect into a JB. It should be reasonably easy if it uses the JB to connect the strappers. You'll need another JB or use a terminal box with at least 8 ways to rewire with two T&Es to the new intermediate Sw and so complete the circuit.

Legh
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Lighting question

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