mcb trips..

[kuksiani]

i have install 18 way CU but im so surprised why one MCB trips every time when i switch on main switch..just one of them..he does have any problem on cable installation and not trip after i switch on again..if i switch of main switch and i switch on again that MCB trips..its brand new installation , CU and MCB..another strange problem its the consumer unit make noise..its not like usually noise of transformer do..its like PIIIIIIIIIIIIIIIIIIIIII..i never heard that before..its first time for me..any sugestion why MSB trips and why CU make noise...

 

[richy3333]

What??

 

[Paul.M]

Have you tightened up the MCB to the busbar? Check that first.

 

[Guest111]

Heads up guys it's Mystic Meg time again.

 

[richy3333]

I'm happy to try and help but there has to be at the very least basic Scottish language for me to understand the question

 

[Steve_P]

The nail holding the backbox in has gone through the cable? There's a wasps nest behind the consumer unit? Hang on, let me get my crystal ball out.

 

[Guest111]

the other worrying thing is that it would seem he'd be happy if the noise from CU sounded like a TX! what boards has he had before?

 

[Guest111]

A potentially appropriate song?

The Move - Fire Brigade - "Top Of The Pops" Show (1968) - YouTube

 

[kuksiani]

i ask for help not for joking..my English probably its not academic language but i think its not a problem to understand what i ask.. thanks to any one try to help but If anyone there is nothing to say the best way its to shut up your mouth..

 

[Richard Burns]

If the MCB trips then there is a fault in the circuit connected to it. You need to test the circuit to find the fault, since it is tripping an MCB instantly it sounds like a direct short circuit, so it should be easy to find on a continuity test.
As it is a new install this should have been caught on the inspection or testing before powering up, so repeat these again for the faulty circuit.

 

[Guest111]

i ask for help not for joking..my English probably its not academic language but i think its not a problem to understand what i ask.. thanks to any one try to help but If anyone there is nothing to say the best way its to shut up your mouth..

we try to help,but without more info what can we do?Are you an electrician,have you fitted this board,what tests have you done,where are you? we need more than a vague description of a sound to help you,there are a lot of good lads here but we are not psychic.

 

[UNG]

No mention of any testing before engaging fingers and keyboard as usual

 

[Guest111]

No mention of any testing before engaging fingers and keyboard as usual

hence my post from youtube.

 

[Guest111]

Come on we're waiting!

 

[richy3333]

i ask for help not for joking..my English probably its not academic language but i think its not a problem to understand what i ask.. thanks to any one try to help but If anyone there is nothing to say the best way its to shut up your mouth..

That's the way, polite response always get the most help mg_smile: