"GeorgeCooke" has made the very same assertion (again, without evidence) in the IET forum, so maybe that proves that it is trueExactly. Do you see why actual evidence is important when claiming something is factually correct?
Kind Regards, John
"GeorgeCooke" has made the very same assertion (again, without evidence) in the IET forum, so maybe that proves that it is trueExactly. Do you see why actual evidence is important when claiming something is factually correct?
This 'common sense' has nothing to do with the piece of equipment plugged into the socket. I have many of these sort of things:I'm forgetting nothing but, as I have said, I don't see that the nature of the socket (or associated plug) has got anything to do with what over-current protection the circuit requires (which is what concerns BS7671). Even in terms of common sense (regardless of the regs), a 20A circuit can be overloaded via a few plugs with 13A fuses just as well as via an unfused plug/socket.
If you are talking about a situation in which the equipment supplied by an unfused plug/socket may, itself, require overcurrent protection at a lower current level than the circuit's protection necessarily provides, then that protection should be provided within the equipment - not the least because the manufacturer's of the equipment cannot know what will be protecting a circuit to which it may be connected.
Kind Regards, John
Well, in the last of those, it looks as if the 4 '13A' outlets are protected by a single 13A fuse, so I won't bother with that one. As for the others, what is your concern - just about the current literally flowing through the connector (i.e. plug/socket)? Other than that, as I said, I can't see the difference from three adjacent double BS1363 sockets on a circuit - which, again could load that point in the ('40A') circuit by 60A or moreThis 'common sense' has nothing to do with the piece of equipment plugged into the socket. I have many of these sort of things: .............. And it is quite common for one 16A socket to have a selection of them feeding cables that meander around a site powering temp lighting/power. Having 50 sockets on such a system is not uncommon with a possible current draw of hundreds of amps.
2 questions: 1) If that originating socket is sitting on your 40A OPD what is there to prevent 60A being drawn via the socket?
You've moved the goalposts a bit. In the OP's case, we are (presumably) talking about 'fixed wiring', so the rating of the OPD is known to the designer, and (both in terms of common sense and regs) the CSA of that fixed wiring would be chosen by the designer to be appropriate to the OPD.2) If the OPD is only there to protect the cable, should I be expected to use 6mm² cable in 16A connectors for my leads, or for that matter 16mm² in case it's a 63A OPD, and to follow that up have you ever tried fitting such cables into a 16A CEEForm plug or socket?
I've still not been able to find any evidance that BT had any such downgrade, we certainly had 3KW appliances in pretty much every building that I worked in and I certainly found no evidence of any restriction while doing PAT for a number of years.
Nope still here. Tbh I did stop reading after page 1 and carried on with my first fix it was only when I stopped I realised things had digressed somewhat although this isn't my first time posting in the electrics section of this forum so I'm not surprised.Jeez, all the guy wanted to do was fit 2 sockets for his welder and he got a 6 page discussion, I bet he ran away after page 1
Ah. Not clear from your first post. I supposed that the ring main was in the house!Unless it wasn't clear garage is being built at the moment and now I'm on to first fix electrics. I don't even own a welder nor have I ever welded (I want to learn) but as I'm doing first fix I want to try and cover all eventualities before I dry line it.
If anyone is interested in the build thread.
https://www.diynot.com/diy/threads/garage-self-build.532254/
Ah. Not clear from your first post. I supposed that the ring main was in the house!
Fairly easy answer then. Just run a 2.5mm² (or 4mm² if you fancy) radial to your 16A socket positions. That will cover for the future.
Of course, new circuits, new Cu. This is all notifiable work, so you should have a registered electrician designing and installing this!
"GeorgeCooke" has made the very same assertion (again, without evidence) in the IET forum, so maybe that proves that it is true
No I haven't moved the goalposts, all the way through I've been saying an unfused socket/plug system should be protected, especially against the untrained user.You've moved the goalposts a bit. In the OP's case, we are (presumably) talking about 'fixed wiring', so the rating of the OPD is known to the designer, and (both in terms of common sense and regs) the CSA of that fixed wiring would be chosen by the designer to be appropriate to the OPD.
However, I take your point in relation to plugged-in 'leads' - which I suppose is an argument for not having, say, any 16A outlets which are not protected by a 16A OPD, since otherwise 'the lead' (or its designer/manufacturer) does not know what CSA it needs to have.
Kind Regards, John
I had seen the last reply on page 1 and felt you had gleaned the required information. Otherwise I would have tried to migrate the following discussions to a different thread.I'm going down the 3rd party approval route however the guy I used when I rewired the house is no longer doing it.
But as long as I get it inspected before the plaster goes on whoever does the 3rd party approval can still check cable routes and if required I can make any modifications.
Fair enough - but, as I keep saying, you appear to be regarding the role of the OPD as being something beyond protection of the cable.No I haven't moved the goalposts, all the way through I've been saying an unfused socket/plug system should be protected, especially against the untrained user.
Quite so - but, as we all know, these three 'people' (and maybe more!) are all the same person The style and 'pet topics' are far too recognisable for it to be otherwise!And someone else on post #5 here, https://community.screwfix.com/threads/oven-hob-cable-rating.226207/#post-1820008, along with another often claimed fact.
If that's all true, the interesting thing is the apparent implication that they did not believe that 'non-approved makes' were not compliant with BS1363-1 - which requires, amongst other things, that they pass the prescribed temperature rise test with a continuous current of 14A.I cannot produce documented proof but I do recall that the GPO did limit 13 amp plugs to a maximum load of 9 amps ( or was it 8 amps ) in several of the locations where I worked alongside GPO staff, ( interfacing telephone systems to radio paging systems 1972-1984). How widespread this was I do not know. Where equipment required more than 2 kW from a single socket then provided the plug was an approved make ( MK ) an exemption could be agreed.
And extra interesting here.Quite so - but, as we all know, these three 'people' (and maybe more!) are all the same person The style and 'pet topics' are far too recognisable for it to be otherwise!
Kind Regards, John
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