RCD's inline

[SimpleSimon]

A fault downstream of the two RCDs will trip either or both.
A fault in between the two would only trip the upstream one. (This is why we place the RCD at the origin of the circuit in special locations.)
I would suggest that the next time the RCD/s trip, they switch off all the MCBs in the caravan, then reset the first RCD, then the second RCD, and if both reset, switch on each MCB untill the fault returns.
If they are able to identify the MCB where the fault occurs, then they should attempt to identify whether it is an appliance or a fault in the circuit causing the fault.
Disconnect or turn off each appliance, reset the MCB etc.

This is what i was telling them.to.do over the phone. Told him turn off all MCBs turn on all RCDs and turn it on one by one. He said he did that and there was no power at all, nothing tripped but no power. RCD in caravan blown? Doubt it, think its just him. But when he turned caravan sockets on after a couple of seconds outhouse RCD went. There i think is the answer.
They think the fault is in between the RCDs but im telling them its not, its in the caravan.


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[GLENNSPARK]

This is what i was telling them.to.do over the phone. Told him turn off all MCBs turn on all RCDs and turn it on one by one. He said he did that and there was no power at all, nothing tripped but no power. RCD in caravan blown? Doubt it, think its just him. But when he turned caravan sockets on after a couple of seconds outhouse RCD went. There i think is the answer.
They think the fault is in between the RCDs but im telling them its not, its in the caravan.


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standard practice this.....just introduce circuits 1 at a time until the RCD lets go....then its a case of appliances on that circuit......

 

[SPARTYKUS]

Unless theres a N-E fault

 

[telectrix]

they need to know what is at fault so they know what to rob next.

 

[spiders803]

i would just tell them you have a nu mobile number.

 

[mechelec]

good luck getting paid. However much you tell them your bill is I will be very suprised if you get paid it all or indead any at all !!!!

 

[SimpleSimon]

It diesnt matter about pay,its council work so its through my company, and to be fair theyve been nice as pie to me so far so no complaints, its just trying to explain to them that its in there caravan because once its past the service cable going in there its nothing to do with us.

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[SimpleSimon]

Unless theres a N-E fault

Ah so if its a N-E fault does this nlmean RCD could still trip even with MCBs switched off?

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[Marvo]

Yep, as soon as any current flows through the RCD it would trip with a N-E fault even if the live of the faulty circuit is isolated.

 

[GLENNSPARK]

It diesnt matter about pay,its council work so its through my company, and to be fair theyve been nice as pie to me so far so no complaints, its just trying to explain to them that its in there caravan because once its past the service cable going in there its nothing to do with us.

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well they might come across as all sweetness n light simon but dont you let your tools out of your sight mate......and i wouldn`t let on about whats in the van either.....sneaky light fingered little opportunist gets these are mate.....dont lose sight of who and what they are mate.....