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

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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
Why would you energise without cpcs connected (let alone neutrals)?

This is not a safe way of fault finding.
 
As the OP has disconnected the CPC and neutrals and the RCD is still tripping then logically there is a fault to earth on the line conductor.

This could either be a direct wiring fault such as damage insulation allowing contact with a back-box. Also reversed polarity on an appliance could cause the trip.
 
As the OP has disconnected the CPC and neutrals and the RCD is still tripping then logically there is a fault to earth on the line conductor.

This could either be a direct wiring fault such as damage insulation allowing contact with a back-box. Also reversed polarity on an appliance could cause the trip.
Stop repeating yourself, sign of old age.
 
As the OP has disconnected the CPC and neutrals and the RCD is still tripping then logically there is a fault to earth on the line conductor.

This could either be a direct wiring fault such as damage insulation allowing contact with a back-box. Also reversed polarity on an appliance could cause the trip.

Could still be a neutral to earth fault......his cct neutral would have been at line potential as he had it disconnected from supply neutral lol.

Due to no reponses.......I imagine he has thrown the RCD'S in the bin, took the money and wheelspan off the driveway into the sunset!!!
 
Could still be a neutral to earth fault......his cct neutral would have been at line potential as he had it disconnected from supply neutral lol.

Due to no reponses.......I imagine he has thrown the RCD'S in the bin, took the money and wheelspan off the driveway into the sunset!!!
A bit drastic don't you think.:tongue::tongue::tongue:
 
I'd try IR between all 6 conductors bunched in one crock clip and all the other conductors in the installation, checking cpcs first.

Does it trip if you only connect that circuit whilst having all other conductors disconnected or isolated?
 

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