No, just a temporary delay of the inevitable.small victory,
No.the new bit arrived and the shower run for 15mins without tripping but the mcb did get warm, is this normal ??
I think not and I'm suspecting maybe a loose connection somewhere ?
45A and 10mm² should be fine for a 10+kW shower, so neither should get hot if properly installed.
Loose connections can cause overheating
Replacing the MCB may resolve the problem, however it is likely that the contacts where the MCB plugs into the board have been overheated and damaged, or perhaps the wires connected to the board are loose/damaged.
The real solution is to replace the shower fusebox completely.
Definitely have that old fusebox for the shower replaced.
It has no RCD, is probably damaged internally from the overheating.
How can there be a loose connection behind it if you've just changed it for a new one?
But what matters is is it fine to be protected by just the service fuse?Looks like it's fine now although I have noticed that it's 6mm cable coming into the bottom of the box with the breaker in it, although 6mm should be fine for 8.5Kw.
1) Don't know about the MK ones, but in the Siemens range that those were based on the RCBOs are 2 or 2.5 modules wide. I expect the MK badged ones are just that - badged, so an RCBO wouldn't fit.Once I get back from Honeymoon I think I will fit an RCBO (or get a spark to do it), question though can I get a separate unit or does the RCBO need to be fitted to my existing fusebox ?. There is a circuit for the shed which to be honest I don't use just now so I could loose that.
Yes it is. The service fuse is the one on your incoming supply, before the meter.It's not even covered by the service fuse.
You can't switch off the service fuse. What do you mean by "main fuse"?If I switch off the main fuse the shower still gets power,
That would mean that the shower fuse enclosure was supplied from the output terminals of the RCD.I have to switch off the box with the MCB in it to kill power to the shower.
That contradicts what you just said, and would mean that the that the shower fuse enclosure was supplied from the input terminals of the RCD.switching the main off button on the main fuse box does not switch off the shower power.
It's after the service fuse, but that's not adequate.So in short the shower is wired in before any of the fuses.
It was installed by an idiot.I don't know why it is
Nor should you be.and I'm not happy about it at all.
Don't put it off too long.I think I might get the whole lot rewired once I get back from honeymoon, but it's just too much to get sorted 4 days before I get married...
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