Electric Shower blowing fuse

[EFLImpudence]

As I said, though, the current drawn will be the same whether 30/32 or 40A fuse/MCB.

 

[Taylortwocities]

Yes, if the over current is because of the fixed load if the shower.
But we do not know if it is the shower that is causing the problem, or some other fault. The OP has studiously ignored answering questions that would help us. This one was asked only half an hour after the OP put this up.

In addition to the questions you have already been asked, is this a new occurrence, or has this shower been blowing fuses ever since it was installed?

Kind Regards, John

We really need to know.

 

[ericmark]

Yes, if the over current is because of the fixed load if the shower.
But we do not know if it is the shower that is causing the problem, or some other fault. The OP has studiously ignored answering questions that would help us. This one was asked only half an hour after the OP put this up.


We really need to know.

He did answer he said "About" so it does seem likely either shower too large or the fuse wire too small. However we have no way to know which, he will likely need an electrician to find out which, I have had a card of fuse wire which seemed to rupture too early, however only real thing that can be done is measure with a micrometer, not got my copy of BS7671 to hand, however seem to remember it does state diameter around 0.85 mm.
However it would need to be well under size to blow on regular basis.

The fuse would normally even at 50A take an hour before it would blow, may be only a 15 or 20 amp fuse is being fitted?

 

[JohnW2]

He did answer he said "About" ...

He did - but I, for one, did not really understand what that meant in terms of the ('either/or') question I had asked (namely "...is this a new occurrence, or has this shower been blowing fuses ever since it was installed?").

What did you think was the meaning of his answer?

Kind Regards, John

 

[ericmark]

I felt he was saying it had near enough been blowing fuses since installed. Been a long time since I have used re-wire-able fuses, and seem to remember it was very rare that one would rupture, the over load would need to continue for quite a long time, for normal time spent in a shower unlikely it would blow even with a 45 amp shower, so I kind of worry what is going on?

Is there a fault blowing the fuse, and it is neither the shower or fuse at fault? It could be as simple as using 20A fuse wire not 30A, but would personally like to see ammeter reading and that would mean getting an electrician.

Getting an electrician it would depend on how much of a jobs worth, would he agree to repair a shower with no RCD protection? Personally I fitted RCD (30 mA) back in the 90's and would now not be happy repairing a shower without the protection.

 

[JohnW2]

I felt he was saying it had near enough been blowing fuses since installed.

Yes, that's one possibility. However, given that it was an 'either/or' question I had asked, I think that the reply could equally mean "it was near enough a new occurrence" (i.e. had NOT been blowing fuses since installed), couldn't it?

Only the OP can clarify - and, as has been said, we really need to know in order to be able to advise.

Kind Regards, John