Power keeps tripping out, how to diagnose?

[lewism]

Your testing the insulation of the conductors, the rule of thumb is twice the working voltage so for 240v you insulation test at 500v, at 1000v your testing roughly 4 times the voltage the conductors are designed to carry so you can risk puncturing the insulation and actually causing a faliure i believe its called “treeing”

Im not saying it will happen im just saying it might, also the 32a mcb im assuming would be disconnected, you would just be testing the conductors.

I don't like to pull anyone up when I don't know their credentials, but just to put it out there, I'm an electrical testing engineer. I test for a living. Some of the stuff in this thread has me scratching my head.

He said the current generated is 15mA, how can that damage the insulation of a 32A circuit?

It doesn't, anything over 250v puts electronics at risk hence why they reduced it down from 500v in the 18th. You can never guarantee that everything is disconnected. Why someone would put 1000v through a domestic circuit runs a very high risk of frying something.

 

[Energize]

It doesn't, anything over 250v puts electronics at risk hence why they reduced it down from 500v in the 18th. You can never guarantee that everything is disconnected. Why someone would put 1000v through a domestic circuit runs a very high risk of frying something.

I don't know, but we had guaranteed that everything was disconnected because every socket in the house was unplugged.

 

[Energize]

So after all of that faffing around the electrician came and in about an hour found that the fault was in a wire under the floor going to that socket I pictured earlier, he disconnected it and now the circuit works fine, don't know exactly what happened to the wire as it would involve taking the floor up, but joists were nailed in a few years ago, so that's a possible explanation I suppose.

 

[Gav_r26]

Rodent damage?