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its feeding an old immersion tank and two sockets in the bedroom havent done IR as it would mean rooting about in the bedroom having to unplug everything and i have to make clear how manky this house is but it isnt tripping it straight away some times it will stay on for two min some times a hour so im guessing its only tripping under load
 
its feeding an old immersion tank and two sockets in the bedroom havent done IR as it would mean rooting about in the bedroom having to unplug everything and i have to make clear how manky this house is but it isnt tripping it straight away some times it will stay on for two min some times a hour so im guessing its only tripping under load

So you've changed a CU, not done a IR, not unplugged everything and wonder why its tripping???
 
I wouldn't. My CU change estimates include a caveat about faults discovered during the change and additional charges being made.

How are you going to complete the EIC if you haven't tested that circuit properly. You know its the immersion and sockets so that's half the discovery done
 
You originally said "heating" and now its immersion - if its the latter I'd be looking at the connections at the immersion first.
 
first thing is to diss. the imm. heater, either by switching off the FCU if it'd D/P, or diss. the cable from the heater. that is the most likely culprit for your fault--the immersion heater element.
 
Yeah disconnect the element from the supply and try IR between L-N and N-E if eaither are short theb that's mostly your problem. You'll get dead shhort between L-N but you knew that anyway :)
 
Yeah disconnect the element from the supply and try IR between L-N and N-E if eaither are short theb that's mostly your problem. You'll get dead shhort between L-N but you knew that anyway :)

You will get an IR reading of 0.00 M ohms. That's not a dead short, otherwise it would have gone BANG by now...
 
James

In answer to your question its a big NO.

The regs do allow you to place circuits on un RCD protected ways in certain circumstances but never when a fault exists on the circuit.

I am affraid you will have to trace the circuit and fault or leave it disconnected and explain to the customer the reasons why!
 
I swapped a db on a job yesterday and there is a fault on the heating circuit and i just cant find it in the most disgusting house you have ever seen what is the deal with putting it on the non rcd side? can i do it
Just wondering if you are asking such a basic question should you be replacing a db
the route of the cables alone start to answer that one for you.
 
Suck it up and don`t breathe through your nose. Get those circuits tested, find and fix the fault. Issue cert, get paid-premium charge for the scummy conditions.
Learn from it and move on. Just when you think that you have been in hell, along comes hell 2.
I worked in a property once were the fella new about a dead rat in the bottom of his boiler cupboard and he just let it de-compose and rot away
 
Nothing to stop YOU putting it on the non RCB side what so ever. But think about the implications first, it's easier than afterwards when the judge wants to know why?
 

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