On 14/08/2019 09:53, David Wade wrote:
On 13/08/2019 18:30, Arthur Ravenscroft wrote:
Hi.
Just thinking on while I'm rewiring the kitchen I may as well lay down
the cable to reach the shed in the back yard.
I used 10m of 6mm cable to reach the cooker connection unit so I'll
need only 20m maximum to reach a box in my shed.

1st question : It will be a separate breaker in the CU so white size
cable to use 6, 4 or 2.5 ?

Thanks.

Arthur
If possible e-arrange your consumer unit so that the shed is fed from an

RCBO that is not connected to any existing RCD device in the consumer
unit. If thats not possible get a new consumer unit.
That way when you get water in the shed electricsit won't trip the RCD
and take out whatever else is connected to that RCD.

There is certainly merit in separating outdoor circuits from other house
ones, however that may or may not mean that a RCBO at the head end is
the best way forward. Having a RCD at the head end has a couple of
obvious problems; firstly if it trips you have got a walk outside to
reset it, and secondly you might be in the dark when doing so.

In other words, ensuring you have discrimination so that faults on a
socket circuit does not cause loss of lighting might be important.



--
Cheers,

John.

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