Re: Another question for judd
Is that RCD protecting the whole consumer unit and used as the main switch or just the circuit to the garage? If it's the former, it should be okay because each circuit will (Should have), its own MCB. If it's the latter, (I'm assuming that it's an RCCBO type (combined MCB and RCD)) it is far too large for a 2.5mm cable as the short-circuit current required to trip an MCB of that size would be 315Amps and would damage the cable.Re: Another question for judd
I'd agree with Judd on this, the absolute maximum a 2.5mm cable can carry is 27Amps, so in general depending on the governing factors, such as length of run, loop impedance etc the maximum breaker you want to be using is a 20 Amp type. I too have the feeling that the RCD is probably protecting the whole board rather than individual circuits, although to be honest, if the board was replaced under the 18th edition regs then it should be a split load board, in other words 2 RCD devices. unless you can get a feed from the house consumer unit that is not RCD protected you need to be mindful that even if you fit a consumer unit in the garage with it's own RCD you may find the one in the house will trip in the eent of a fault as you will have two, 30 milliamp RCD's on the same circuit and as such won't get discrimination for fault protection.Re: Another question for judd
Is the armoured cable at both ends made off into the proper SWA glands? What size is the cable? Personally, I'd get rid of the FCU in the garage and replace it with a galvanised steel conduit through-box and extend the wiring from there to a new `garage` style consumer unit. No need for an RCD in the garage unit as it is protected at the mains end by an RCD. I would feed the SWA cable with a 20amp MCB (depending on size of cable) and put 10A & 6A MCBs in the garage unit to split the load.Re: Another question for judd
Re: Another question for judd
Re: Another question for judd
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