I've moved into a house with a water fountain in the back garden.
Whoever installed it wasn't electrically competent though ;) There's a
weatherproof box mounted on the wall outside which has mains
transformer inside and the power to the pump is low voltage from
there. The issue is with how the mains gets to that box. Currently
that's achieved with a long internal grade solid core cable that is
laid along the ground and goes half way round the base of the house,
straight through a wall and terminates in a 3 pin plug :/ Needless to
say I've left it switched off for now ;)
On the other side of the wall the box is mounted on there's a double
socket on the ring main and we only ever use one of the sockets. It's
also in an ideal place to control the fountain so what I'd like to do
is replace that with a faceplate that has a single normal socket and
also an RCD FCU (probably just with a 1A fuse in). I've got some
arctic grade cable lying around somewhere that I can use for the very
short run through the wall into the box.
First problem is that I can't find any such faceplates for sale. Also
I'm unsure about whether the wiring on the switched side of a FCU
constitutes a spur and what the implications are there. And then
there's the Part P stuff :(
Re connecting to the outside unit I would have thought that if it
is plugged in then it contstitutes a portable appliance and as
such you do have to bother about regs.
What's more. why worry about the regs anyway? Who will know?
I was hoping to avoid have the cable terminate in a plug and instead
use an FCU like this:
I just can't find a double socket that compromises one FCU and one
normal socket, let alone with an RCD as well.
I hope the regs don't spply to this, otherwise I've got a choice to
As it's outside, you would need an RCD fused spur if you're not using a
plug-in connection via a RCD.
I doubt you'll get what you want. The nearest (and more uglier)
alternative is to get a surface mounting patress box that can hold two
units. If you're lucky, you might be able to marry up the fixing holes on
the back of the socket to the screw holes on the existing patress box and
secure it that way. Watch out, though, because the RCDs are quite bulky
and need a decent depth to the box (such as 28mm) and even then, it's
still a bit tight.
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