Most difficult fault

[WillWX]

Most annoying one I've had, intermittent tripping of RCD.

Went round the same day and tested, everything was fine, hadn't tripped since the early hours, I put it down to perhaps a faulty appliance of some kind.

The couple unplugged a load of appliances and we left it overnight, the next morning I got a call to say early hours it was tripping out again. It would trip once or twice, then be fine.

So went back that afternoon, psychically looking at all socket outlets, and I just happened to notice a slight bit of charring and a purple screw on a double socket in the office, I unscrewed the socket and it was a full blown ants nest in the back box, never seen so many little sizzled ants, they must've been coming back in early hours and groups of them were getting fried.

Cleared it all out and sealed up inside and outside, never a problem again.

 

[jackhammerJIM]

So they asked what would help them - RCBO board - so that was fitted a couple of weeks later ...... so now only 1 circuit would go off.

Thats a very expensive fault finding method

 

[Octopus]

Thats a very expensive fault finding method

Having an upfront RCD is never a good idea, yet I still come across recent installs in this way....

When the decision to go for the RCBO board was made it was with the full knowledge of the client that it wouldn't fix the problem..... But would minimise the inconvenience ..... At that time and going forward ....

Role on the 18th and its daft ideas about RCD's and earth leakage design ...

 

[jackhammerJIM]

my bad i didn't read upfront rcd ...