mk rcd tripping

[Darren-Sparky]

hi, today i installed a 8 way mk rcd i had from left to right;

100a main switch
63a rcd

40a mcb cooker
32a mcb ring main
16a mcb immersion
6a lighting up
6a lighting down

tns system, i did my tests before i installed new consumer unit and all was good, when i tried to turn on cu the rcd would trip immediately, but other times i could turn on the cu and rcd would stay on but as soon as i plugged anything in to a socket or switched a light on the rcd tripped? also the test button would not operate i replaced the rcd with 3 new ones just incase and all the same results an intermittent fault that never really occurred more than once.

ive checked polarity of incoming tails and all seems good, i also couldnt get rcds to trip using my rcd tester,

any help would be appreciated

thanks

 

[Darren-Sparky]

only 1 rcd therefore only 1 neutral bar

 

[Darren-Sparky]

and obviously what i call the clean neutral bar which is the neutral that comes from bottom of incomer to top of rcd

 

[Darren-Sparky]

If you are 100% sure your IR results are good and the configuration of the board is correct, isolate 1 circuit at a time and diss the neutrals for the isolated circuit and repeat until you find the offending circuit.

thanks for your help

 

[Octopus]

only 1 rcd therefore only 1 neutral bar

So please explain how that is going to comply with the regs???

 

[HandySparks]

Can you put up a photo of the board showing your wiring?

 

[Darren-Sparky]

So please explain how that is going to comply with the regs???

how do you mean ?

 

[BES]

Wind up

 

[Carlosfandango]

Wind up

That's what I first thought but I fear not!

 

[Darren-Sparky]

dual rcd on 5 circuits ?

 

[trev]

RCBOs is the way I'd have gone but never mind

 

[Des 56]

Whether he's a winder upper or no,he has this thing about changing Rcds
Here now and in the other thread

Being a sucker for winder uppers, I am going to wait and see if there are more clues coming from his posts before engaging in drivel

 

[Leesparkykent]

dual rcd on 5 circuits ?

TBH a main switch board with RCBO's would of been a better choice for not that much more money as you only have 5 circuits and it would of narrowed down the problem you are having to a particular circuit itself.

 

[Darren-Sparky]

rcbos would normally always be the choice if price wasn't an object for the customer

 

[Octopus]

how do you mean ?

So you think a single rcd board complies do you? I don't

 

[Darren-Sparky]

So you think a single rcd board complies do you? I don't

please explain