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Discuss rcd tripping on a ring main in the Electrical Forum area at ElectriciansForums.net

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Ok help before a pull out the rest of my hair got an rcd that trips when ring main breaker turned on got continuity but still trips when only live connected ant ideas
 
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  • #3
ok so just changed a board connected everything back up and was tripping on lights or so I thought so disconnected them. no all I have connected in board is two lives for ring main and rcd trips when ever I turn the breaker on
 
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  • #5
yep disconnected everything trying to check whether a neutral was crossed or something literally pulling my hair out now
 

Strima

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IR test results?

Continuity tests both end to end and figure of 8?
 
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  • #11
ok so got continuity not shorts insulation resistance low but not too low at 16meg and again all I have connected or two lives of the ring no neutrals for any circuit no earths for any circuit. RCD stays on until I turn the breaker on. Never come across a fault like it
 

Strima

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Arms
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IR test done with all earths connected? Sounds like you have a path to earth somewhere.

If there's a boiler or other fixed appliance on the circuit check for reversed polarity.
 

Pete999

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ok so got continuity not shorts insulation resistance low but not too low at 16meg and again all I have connected or two lives of the ring no neutrals for any circuit no earths for any circuit. RCD stays on until I turn the breaker on. Never come across a fault like it
With no Ns connected wont you have an imbalance in the circuit?
 
If this is a dual rcd board and I know this is obvious but are the neutrals definitely in the correct neutral bar.
 
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