Please help. I have a basic understanding of electirics, but 5 Electricians are stumped and I don't know where to go next. My mother in law heats her house by 4 Night Storage Heaters, all of which are wired to a Economy 7 supply/fuse board, with no RCD just MCB. The largest of the Night Storage Heaters began to fail and trip the MCD. To cut a long story short, she ended up having a new one fitted. Unfortunately this new one also now trips the MCB. The electricians have tried swapping the various supplies to the various heaters around in the E7 fuse board and the same heater is tripping the different MCB. It would be an obvious thing to consider that there is a fault on the circuit between the board and the night storage heater. However, they have now wired it into the day time board and it is not tripping. Has anyone got any ideas as we need to get it wired back into the E7 circuit??
- Thread starter Steve Poulton
- Start date
E
elsparko
im a young guy, im basically lead electrician, whats his excuse?
may be LT21,
that the has chewed more then he can bit .may be you can give him
guidance's then us . may be the person who post it on this forum is a bit p88t off .
Ohms law ,and these cold nights may be to blame,
marginal design ? (or changed out with different parts)
--More current , more problems--(Possible Danger-!)
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Away from the sea the midlands can get cold too !cold nights? you english are too soft
(unless under an umbrella of smog in town )
Good. And we will do our best to help. What we need from you first of all is the clearest description of the problem from as far back in time to now that you can give. We also want full details of the overcurrent protection devices. Be accurate with your language so if you mean fuse that's what we understand and if you mean MCB that's what we register also. Let us have the actual ratings, types and makes of fuses/MCBs. Tell us too the power of the storage heaters and their make and model.
What would be really helpful is one or two pictures of the CUs and wiring and then some commentary on what fuse/MCB is supplying what.
Don't give up. See it as a challenge from which you can learn.
Jeeze guys, give the OP a break. If you don't want to help, then don't post. I guess we've all had electrical issues to deal with where the problem doesn't seem to fit normal solutions. Asking what to some might appear to be a question which has an obvious answer, doesn't mean the answer is obvious to everyone. I stupidly believe the Forum is here to help, not slag off posters at the earliest opportunity. Rant over!
As some others have suggested, your problem does appear to lie in the E7 board. Given what else has been done, I would try the largest MCB which the circuit installation/ccc will permit, located at the end/away from the other MCBs. Apologies if you have already tried this - it's starting to get difficult to ID exctly what's been done. Oh, I also suggest that you post clearly, earthing type, Ze, Zs, R1+R2 and insulation resistance of the circuit involved.
As some others have suggested, your problem does appear to lie in the E7 board. Given what else has been done, I would try the largest MCB which the circuit installation/ccc will permit, located at the end/away from the other MCBs. Apologies if you have already tried this - it's starting to get difficult to ID exctly what's been done. Oh, I also suggest that you post clearly, earthing type, Ze, Zs, R1+R2 and insulation resistance of the circuit involved.
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