Installing outside electric socket.

Avoriaz

I want to install a double weatherproof outside electric socket.

There is an existing interior double socket on the side wall of my house about 50cms from the rear wall. The other side of the wall to that would be an ideal place for the new socket.

Is there any reason why I shouldn't run a spur from the interior socket straight through the wall as described in this link?

The interior socket is about 50cm above floor level. The new exterior socket would be about 70cms above ground level.

The exterior socket would be used for an electric mower, a power washer, occasional lights etc.

The house is about ten years old with separate upstairs and downstairs rings, each individually RCD protected. I have no reason to think that the socket I plan to spur off is itself a spur. Do I need to check that?

Thanks.

Antispam

I have a outside socket which was taken from a spur inside garage. Between the spur and socket I have a switch on mine so you can turn off power. Not sure its necessary but I wanted one. I didnt get a socket with RCD as the socket is protected by RCD on the fuse box. A sparky fitted mine. I am having another one fitted soon for back of house to feed occasionally workshop mainly a temporary light and for power tools only temporary

Gloomendoom

Avoid all the Part P and building control shenanigans by just using a kit from Toolstation or similar...

http://www.toolstation.com/shop/Electrical/IP66+Rated/IP66+Outdoor+Power+Kit+2+Gang+Switched+Skt++Cable++RCD/d190/sd3138/p27175

I think Aldi has them in as a special buy at the moment...

https://www.aldi.co.uk/en/specialbuys/thursday-19th-june/product-detail/ps/p/outdoor-wall-socket-kit-1/

System

I don't believe that you require Part P any more for adding a spur for an outside supply. You do if it is a brand new circuit.

I think this change came in in April

Jonesya

You can't spur off a spur, so yes you need to check it is on the ring.

Personally I'd fit an isolating switch inside, could be handy in case the external socket gets damaged or water gets into it, switching outdoor christmas lights, stopping anyone stealing your electric if its on the front of the house etc.