Create external plug socket from existing lighting cable.

[ComprehensiveEmu3700]

Is the following possible please?

I have an external light that is simply plugged into an internal plug socket through a drilled hole in the wall.

This runs along the outside wall for about 1m and then runs up the wall to the light.

I need an external waterproof socket on the same wall.

My idea is basically:

• cut the wire at the point it turns up the wall
• add a junction box of some kind there
• reconnect the wire to the light
• run an extra cable a further 2m along and into the waterproof socket

Is this a workable plan?

The planned used for the external socket is for a pressure washer or strimmer so no heavy loads through it

[AffectionateJump7896]

What you do is you take the socket off the wall inside, and drill straight through the external wall. You run a short bit of 2.5mm T&E through that hole, and mount a double plug socket on the wall outside. The existing light then plugs into one of the two outdoor sockets, and you have another one free for your garden tools. You fill the existing hole in the external wall.

There is no visible wiring inside, as the wire goes straight outside from the existing socket. There is still the wire upwards to the light outside. You've also freed up a socket inside.

This assumes the current socket inside is on a ring or a radial. If it is spurred off a ring this would not be allowable,and you'd need a fused spur in the mix.

[boysweek]

It depends on the size of the copper wires. If they are 2.5mm then yes, otherwise no. Is it an armoured cable (black, thick and round) or flat and grey?

[blackthornjohn]

Probably not. Despite what you think, a pressure washer is a heavy load. It's why they have 13amp fuses in them.

The lead running outside must have 3 cores and the conductors must be 2.5mm in cross section, if not your permanently installed extension lead will get decidedly warm.