Hmm, not convinced. would you not wish to know that the cable has an issue?
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"John Rumm" wrote in message
news
On 26/01/2019 17:33, Chris Green wrote:
I'm running power to a shed, not a long feed from an existing CU in
the garage. It will be fed from an MCB (or RCBO) in the garage CU and
will have a small (2 circuit?) CU in the shed with one CB for power
and one for light.

So which end does one have the RCD protection?

Assuming you don't need the RCD protection to disconnect an earth fault on
the supply cable, then the RCD should be as close to the final circuit as
possible. That way you make it easier to discriminate between faults, and
stop for example losing the outbuilding lighting as a result of a trip on
a power circuit.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/