Fuse triping after nieghbourhood power cut.

[Bigands]

We live in the sticks and recently had a power cut which lasted a good few hours - around 20 houses were affected. Since then the main trip on the main fuse box (we have an extension which is fed by this box but has its own 'sub box' with 3 mcb's in it) keeps tripping, by switching off all the mcb's then turning each on individually, the fault was found to be the extension sockets. I've had all the frontplates off - all o.k. then swapped out the mcb for a spare one - same problem. The extension is only 2 years old and i'm thinking maybe the power cut may have been accompanied by a surge which may have fried a split cable.
Sparky required or anyone any brainwaves ?

 

[swampy2]

Proving the dno is liable will be tricky, unless a lot of people locally have the same issue.
I was called to old teachers home who`s old c/heat timer stopped working, happened just after transformer on opposite street burst into flames.

 

[Cliffy88]

That's good you have found the faulty circuit. Now you will have too disconnect all the loads (anything pluged in) and then try to turn the mcb back on. If it stays on you don't have a faulty cuircuit but a faulty load. Then put the loads back on one by one and then the faulty load should trip the cuircuit and the you have found your fault. Let me know how you get on

 

[Bigands]

All loads were taken off - forgot to mention, dodgy cable some where pretty sure. More I think about it, more it makes sense to get a sparky in. Could spent a while taking fronts off again and check continuity between earth - live and earth - neutral (have a multimetre) at least then I can locate the cable at fault.