- Reaction score
- 116
Evening all. Just after a bit of advice. Just been out on a job where they have had Random tripping of one of the RCD's on a split load board. They were told by a previous electrician it was the shower so that got replaced, problem continued. Another electrician said they had a cracked shower pull cord box and damp was getting in so he replaced that. Another replaced the RCD and the saga continues and I got called in.
Last night, mulling over my options with the info I had I though it sounds like a N-E fault so i'll megga all circuits and see what I get. Anyway all about what you'd expect for the age, although ring circuit was down to 40MΩ. Oven circuit >999MΩ N-E however with the oven back in circuit 7MΩ N-E. Although not a fail would you say this would be low enough to give intermittent trips of an RCD when under load. Funnily enough they could not replicate the problem tonight but they are convinced it has happened when they have had the oven on. Also to note when I removed the front plate of the 45A oven switch the line feed fell out and was not screwed down at all, could this have caused the RCD trip?
Any tips would be appreciated, i'm back there saturday...
Also to note RCD tests are fine and ramp test no apparent issue with the RCD and in any case has been replaced.
Last night, mulling over my options with the info I had I though it sounds like a N-E fault so i'll megga all circuits and see what I get. Anyway all about what you'd expect for the age, although ring circuit was down to 40MΩ. Oven circuit >999MΩ N-E however with the oven back in circuit 7MΩ N-E. Although not a fail would you say this would be low enough to give intermittent trips of an RCD when under load. Funnily enough they could not replicate the problem tonight but they are convinced it has happened when they have had the oven on. Also to note when I removed the front plate of the 45A oven switch the line feed fell out and was not screwed down at all, could this have caused the RCD trip?
Any tips would be appreciated, i'm back there saturday...
Also to note RCD tests are fine and ramp test no apparent issue with the RCD and in any case has been replaced.