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There is a handy loophole where you can connect an IP66 exterior socket on the outside of a wall if it's directly connected to a socket inside. i.e. no exterior wiring. So if you have a socket on the inside of an exterior wall you can drill through the back of the back box, pass the correct size wire through and mount an exterior socket. That should be RCD protected but this can be done with an RCBO in the consumer unit by a competent installer.
That's exactly the set up I have, thankfully. The exterior socket was fitted by the electrician when we got our main CU replaced and the wire comes straight out of the wall into the back of it. When I swapped the socket for an RCD one (again, at the advice of a grown up), I didn't have to touch the back box or any of the wiring coming out of the wall. Same brand socket so was just a straight swap like an internal socket. Nobody really needs to know I did that.
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Tricky thing is the socket is on the party wall - not the rear wall which is actually window frame - it's a 60's crosswall.
How does this sound... 4 gang extension lead in shed > out of shed (via hole) > into outside socket (with rcd) > though windowframe>into conduit along wall>wall mounted switched spur box>out back of this into back of mains Double socket.
Then I can switch the power off from inside the house on a daily basis or completely disconnect at the outside socket for longer periods ?
As for running the lead in the virgin media conduit - surely if we know its there - damage is very unlikely - i appreciate its against regs.
oh and thanks to you and all esp. @stevo_com - for the advice ;-)
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stevo_com
Sheppz
@Airhead
As long as the extension lead is 'temporary' you can run a shed off a socket indoors. The sockets near to the garden should all be protected by RCD if the consumer unit has been installed in the last 20 years. If not then use a plug in RCD and plug your extension lead into that.
Temporary means you can't fix the extension lead to anything like a wall or fence or bury it in the ground.
There is a handy loophole where you can connect an IP66 exterior socket on the outside of a wall if it's directly connected to a socket inside. i.e. no exterior wiring. So if you have a socket on the inside of an exterior wall you can drill through the back of the back box, pass the correct size wire through and mount an exterior socket. That should be RCD protected but this can be done with an RCBO in the consumer unit by a competent installer if your installation is so old that you don't have an RCD.