Main switch tripping RCD.

[SteveT]

Evening all,

i have an issue with and RCD in a Hager split load CU.

Was called because the RCD tripped and wouldn't go back on. When I got there I turned all the breakers off and tried it and it still didn't stay on. I turned the main sw off along with the breakers and it went up but off again as soon as board was energised.

Voltage is at 239v so no issue with supply plus the first have of board isn't RCD protected.

changed RCD with the same results.

No work been done or anything added, any ideas?

Cheers,

Steve.

 

[R G]

What testing have you done , and are you aware of the specific workings of an RCD ,by any chance ?..

 

[D Skelton]

N-E fault on one of the circuits, it's a no brainer.

 

[Darkwood]

Think about it what does the main switch Isolate from each other upstream of the meter...

You need to prep-up on your theory -

Have you physically disconnected all circuits L an N on that rcd then added one at a time... clue !!! N/E fault!

 

[Marvo]

Erm, find the insulation fault or find the borrowed/crossed neutral would be the way to go.

Also measuring the supply voltage at 239v doesn't necessarily means it has 'no issue'

 

[Hawkmoon]

I think this fault may involve that part of the circuit commonly known as the neutral and that other part of the circuit often referred to as the earth

But don't quote me as I am on the wrong side of 3 glasses of ozzy white!

 

[NickD]

Also measuring the supply voltage at 239v doesn't necessarily means it has 'no issue'

Confucius he say, proving unit him not same as 300kW transformer.

 

[Octopus]

mice damage, water damage, diy damage, appliance fault..... do some tests....

 

[telectrix]

it's perhaps a good job that glenn is in hibernation at the moment.

 

[MDJ]

why hasn't Marvo moved this to the DIY forum?

 

[D Skelton]

Coz the OP claims to be an 'electrician'!

Worrying isn't it, that someone can charge money for a service they don't even know how to provide!

 

[R G]

it's perhaps a good job that glenn is in hibernation at the moment.

He's probably tearing round Leeds in his new vehicle demonstrating how road rage should really be carried out,,,LOL,,

 

[dazza1981]

My moneys on a wind up here..... got to be !!!
Hes been a member for 4 years for christ sake, surely he knows that he will get beaten up for this post. Tell me your kidding steve FFS

 

[Badged01]

He's probably tearing round Leeds in his new vehicle demonstrating how road rage should really be carried out,,,LOL,,

Nah, I reckon after he's washed the dishes his mums got him taking her out for a post-tea drive to see the relatives!

 

[R G]

Nah, I reckon after he's washed the dishes his mums got him taking her out for a post-tea drive to see the relatives!

He He he ,, I could just picture it ,,,He he he,,,

His mum must be shaking in her boots,,,LOL,,