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Hello, just some advise please...
I've bought an electric shower (10.8Kw) to install in place of the old mixer shower that comes from our combi boiler. I'm fairly happy with the work required (will be using 10mm2 2 core+earth with 50A pull switch). Plumbing appears straightforward too. The one bit I'm NOT clear on is the wiring into the Consumer Unit.
I understand that I'll need a 45A+ MCB with 30mA RCD. However, my consumer unit (which is an older 8-way Wylex) has 100A master switch with 'Maximum Load not to exceed 100A' sticker below. I have 4 MCBs in use in the unit (2 x 5A [lights+mains smoke alarm] and 2 x 30A [cooker + sockets]).
Clearly, the sums say 70A of MCB already installed, so 45A MCB for shower would be a problem. But then I get confused because the other 4 MCBs in the unit which AREN'T wired up (think the previous owner had them in at one point) bring the total installed up to 120A.
What is going to be the best way of getting an MCB + RCD wired in. Could a 45/50A MCB actually be used in the consumer unit, given the above info, then with RCD housed seperately?
Am quite prepared to get an electrician in to fit etc, if not straightforward job, but would appreciate some advance advise so I know what I'm talking about!
Cheers...
I've bought an electric shower (10.8Kw) to install in place of the old mixer shower that comes from our combi boiler. I'm fairly happy with the work required (will be using 10mm2 2 core+earth with 50A pull switch). Plumbing appears straightforward too. The one bit I'm NOT clear on is the wiring into the Consumer Unit.
I understand that I'll need a 45A+ MCB with 30mA RCD. However, my consumer unit (which is an older 8-way Wylex) has 100A master switch with 'Maximum Load not to exceed 100A' sticker below. I have 4 MCBs in use in the unit (2 x 5A [lights+mains smoke alarm] and 2 x 30A [cooker + sockets]).
Clearly, the sums say 70A of MCB already installed, so 45A MCB for shower would be a problem. But then I get confused because the other 4 MCBs in the unit which AREN'T wired up (think the previous owner had them in at one point) bring the total installed up to 120A.
What is going to be the best way of getting an MCB + RCD wired in. Could a 45/50A MCB actually be used in the consumer unit, given the above info, then with RCD housed seperately?
Am quite prepared to get an electrician in to fit etc, if not straightforward job, but would appreciate some advance advise so I know what I'm talking about!
Cheers...