Lights trip rcd when switch is turned off

[Mikey1001]

Hi, ive came across a fault today, the house has been rewired a month back and I was called today because the rcd would trip when the bedroom switch was turned off, it would turn on and work fine but as soon as you switched it off it would trip out, there is a standard pendant and single pole switch, insulation resistance checks out fine so im baffled to why this could be tripping.

 

[Midwest]

Hmmm, only thing I’ve read is about DP switching causing probs. What lamp is in the pendant? What about the rest of the install?

 

[Mikey1001]

Hmmm, only thing I’ve read is about DP switching causing probs. What lamp is in the pendant? What about the rest of the install?

Its very weird I cant get my head around it, rest of the circuit is fine, and led bayonet lamps, rest of the house passes IR

 

[Andy78]

Its very weird I cant get my head around it, rest of the circuit is fine, and led bayonet lamps, rest of the house passes IR

Tried the led lamp in different pendants and different lamps in this pendant ?

 

[Midwest]

Its very weird I cant get my head around it, rest of the circuit is fine, and led bayonet lamps, rest of the house passes IR

What about the actual RCD, hows that test out?

And earth clamp it.

 

[James]

have you tried it with no lamp in the fitting?
incase it is something else on the circuit?

 

[Mikey1001]

Tried the led lamp in different pendants and different lamps in this pendant ?

I have yes, the same thing happens with the other lamps in this pendant

 

[Wilko]

Hi - just a thought, but confirm polarity is correct.

 

[Mikey1001]

Hi - just a thought, but confirm polarity is correct.

Yes polarity has checked out fine! Its got me left at a blank

 

[Baddegg]

is It switch fed or looped at the ceiling roses?

 

[Mikey1001]

is It switch fed or looped at the ceiling roses?

Looped at the ceiling rise

 

[davesparks]

Check that the switch isn't in the neutral