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Thank you! That is all I was getting at :). “Theoretically yes” has the definition that something is possible according to theory. As I have said before I think you are saying “will this happen in real life?” and as I have said before, it is unlikely, perhaps very unlikely but as you concede...

EFLImpudence -I think you are getting caught up in the examples I used to explain the principle and you are thinking about a device rather than the principle. To keep purely to the principle, a device that normally draws say 4A could conceivably develop fault(s) where the current increases to...

I started the post by saying this was a hypothetical situation, there is no real appliance. It is a description to show the engineering reasoning of how a lower fuse rating may, in some circumstances, provide additional protection. I also specifically said "assuming that this doesn't cause the...

Obviously this should be the case, but it is worth noting that some cheap sockets that are finding their way to the UK unbelievably don't have a connection between the two earth terminals! For example this one, you can skip to about 7.50 as the video is quite long!

Hypothetically if I had a basic 900W heater that draws just under 4A, a 3A fuse is clearly inadequate so based on the previous comments on this thread, it would be reasonable to assume a 13A fuse was installed by the manufacturer in the appliance’s plug. Assuming a suitably rated mains lead was...

Exactly, for example you can see the first distribution panel didn't have any Earth connections for any of the supplies. Compared to the UK with rules stating that you need tools to access panels in the workplace, etc - there it's just up to you not to touch the open panel and to be fair, you...

Iggifer - Thanks, nobody hurt just property damage which is the main thing. I completely agree, the fire should not have happened in the first place - but things do happen and bad design or double or triple faults do occur sometimes. It was a tumble dryer. I always emptied the lint filter on...

Back to the topic, I found a 1A mains fuse in a lamp which had blown as the bulb had blown which is a nuisance failure. However I have also had an appliance become faulty and catch fire = house fire and the 13A fuse did not blow. Interestingly when the fire brigade dragged the unit outside...

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A. That was the specification. And your point is? A. There's no point, just information. Possibly. Possibly. Or possibly this is uninformed speculation on your part. A. it is uninformed speculation on my part, hence my use of the word "possibly". And you know that the cause of that damage...

Ok, not strictly in the UK but it’s 415V 50Hz and should have been to UK standards. It’s live and in use on an active site. This is permanently left open in a small room with an open door, so when it rains it does get a little damp. This isn’t a close up, it’s a large SWA cable. Not...

Interesting, thanks - I'll watch out for that. These particular ones were 4 - 5 inch diameter in places and full of sediment, so I think they were for some kind of early central heating system. Luckily one end was open, so they weren't in use and I have cut a lot of them out already. The...

Lol, RCD!? Assuming that RCDs first got a mention in the 14th around 1966, parts of this installation (that are still in use!) pre-date that by circa 50 years! The last update to the main part of the house was probably in the 70s. The DNO supply goes through the meter and is then split into...

Just doing some renovation work in an 1895 house and have found that the wiring isn't perhaps BS 7671:2008+A3:2015 compliant... Renewing the ceiling and tidying up some old Victorian cast iron central heating piping that was in the loft (see below) and I thought I would remove some of...

Great, thank you. Did that on two ceilings and worked perfectly, thanks :-)

In an old house with lath and plaster ceilings, all the bedroom ceilings have cracks and uneven finish that at some point someone has Artexed to try and cover the poor condition. This failed dismally and they now look in poor condition but with Artex on, so even worse! Had the Artex texted for...

Hi, Can anyone recommend a good quality, strong, large loft hatch and ladder combo please? I was impressed with a wooden 3-part folding ladder attached to a sprung hatch that I once saw in a house. I spotted something similar in B&Q a few years ago that was reduced in their ‘missing parts’...

Great, thank you very much. I'll go with 32A and keep with 6mmsq cable.

Just to add that SMD means Surface Mount Device and is referring to LEDs that are Surface Mounted. So SMDs are LEDs, just that you tend to get 20 - 60 of them in one GU10 unit, as opposed to normally getting 1 - 5 'regular' LEDs in non-SMD LED lights.

Great, thanks for the very quick reply and diversity calculation! To help me understand a bit better, can you explain why you would use a 32A RCBO rather than a 45A one please? I can understand if fitting a smaller protection device means cheaper / easier to work with cables can be used...