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If I were to ask an electrician to add a plug socket onto an electrical wire that currently just has a wall light coming off it, would he do it?

(I’m pretty sure it’s technically possible, I’m thinking building regulations and so on.)

I don't know English code, but I know my own code and doubt there would be a problem. You wouldn't be able to get as much current out of the outlet because the light takes some, but the breaker would limit that so as long as the install is to code you're probably fine and in fact your house probably already has lights and outlets on the same circuit.

@sj_zero Oh, cool. Thank you!

It would just be to run a small freezer, the light rarely gets used.

@Flick slightly contradictory, but if they are going to be cerifying your wiring after the work anyway they should be able to add

@FeartnTired Embarrassed to admit I didn’t even think of googling for it because I assumed it would be a β€œno”!

@sj_zero Of course, whether the light itself is up to code is a whole nother matter…. Someone who fancied himself as a DIY expert lived here at one point.

At the point the question just becomes "how much to fix it?"

Sparkies aren't cheap but good ones are really good.
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@sj_zero I don’t know the guy, but my kitchen fitter presumably rates him.

@Flick we had to learn a bit about our wiring for the EICR inspections, so there's lots of stuff that is possible, if it it's done a certain way. like maybe upgrading that wire, or the bit it goes to on the board to meet regs. Just DIY a box onto a lighting wire is probably a very bad idea.

our very Glasgow leccy pronounced conduit as conjit

@Flick reading your other reply, you badly need a full EICR pre inspection as you may well fail and need some upgrading.

@Flick to clarify what I mean by pre inspection. we had the house rewired by a bunch of cowboys hired by the HA. 10 years later we were to have it inspected. (now 5 years) and we hired our own chap to do this as we did NOT want the cowboys back over the door. He started what should have been routine and then worriedly told us he'd found lots of problems already, so the house would fail. He'd have to submit that report and given HA could have all sorts of problems. So he ripped it up. Finished working out what would pass and what would fail. And came back and fixed everything. THEN did the inspection and could happily sign off that it passed - it's not just opinion based, there's all sorts of readings to be logged. In 2023 it was due again and this time was to be done by City Building, with some negotiation. Their leccy, the marvellous Shelley, came and found no problems due to all the repairs that had been done previously. And said that almost every property they inspected after the rewire needed remedial work to pass. Not my problem, but I hope they sought to recover costs from the firm that did all the damage, but I'll bet they didn't.

@Flick @sj_zero If the load is increased, they would just swap out the breaker (if you call them that in UK). You probably call them bonnet splatch wacker screws poppers.

@sj_zero @Flick I've replied separately to Flick, but UK wiring is entirely different - power ring mains and lighting ring mains run on different amp ratings, so you can't safely wire a power socket into a lighting ring over here. (And we have a third rating for really heavy power items like cookers - they have dedicated 32 Amp rings).

Also everything should be signed off and certified by a qualified electrician who sends copies of the certificates to the local authority building department. You can do it without, of course, but you'll be up shit creek without a paddle if you later want to sell the house without the paperwork to demonstrate the work has been done safely.

@Flick No.

Power sockets and lighting outlets run off different amp ring circuits. It is very dangerous to add a plug socket to a lighting ring.

@FeartnTired I had one when I bought the house. There were a few advisory things but nothing major.

@FeartnTired @Flick That is indeed completely contradictory.

If you plug anything that draws 13 Amps (so kettle, convector fire, microwave, your hoover) into the socket, you'll immediately trip the circuit breakers if your circuit board has been installed correctly. So it's a bit pointless installing a socket that's 5 Amp only.

And if your circuit breakers don't trip immediately, then you need a proper circuit board installing (at risk of the whole fucking house burning down).

Also, people (aka men who self-identify as "good at DIY") don't half spout a lot of shit on Reddit.

I suspect your better option would be to identify a single socket and ask an electrician to replace it with a double socket.

TL:DR - find a good electrician (recommended by people you trust, preferrably who've been using his/her services for a decade or so) and get them to tell you what should be done.

Sorry, I know I'm banging on about this lots on this thread, but getting this stuff wrong can (a) be dangerous and (b) leave you with a house you can't sell because of bodged, undocumented work.

@EmmyNoether If I had a single socket in that room, I would just use it….

Mea culpa Maxima, I didn't realize that.

@sj_zero @Flick Don't worry. I suspect it's the UK that's weird on this one.

All the standards have kind of grown up by accident historically and there are probably better ways of organising one's electricals code. (I was tickled pink when I went to SW China, though, and discovered that they used British 3-pin plugs there. πŸ˜€ )