I agree. Given that 4mm² is way above what would be required as a CPC in a multicore cable in the great majority of circuits, I can but assume that the 'thinking' (if that's what one calls it) behind this reg presumably must relate to 'mechanical vulnerability', rathe than anything electrical. Mind you, it's worse than that because, even if 'mechanically protected', a 'separate CPC' has to be at least 2.5mm² !That is one of the so called regs that don’t make sense.
We each know what we would personally do, but I would not (and don't think that anyone else should) suggest that anyone else should 'ignore the regulations' (even though they are 'non-mandatory')I would happily ignore it and use 1.0 mm green/yellow wire. Much safer than no earth and just as safe as T& E.
Maybe because many of the accessories of the day had no provision for 'safe parking' of a CPC, and they didn't want to leave a bare earthed conductor 'loose' within the accessory, with the potential risk of it coming into contact with something 'live'? ... but, yes, very annoying for those who have 'followed'.Why would they do that ‽In many cases, older electricians used to nip off the earthwire when using T&E cable in the 1960's and even 1970's. A source of great annoyance to those who came after.
BTW brits call it "earth", yanks call it "ground", if you see the word "ground" you are probablly reading an american site. Wiring practices are very different on the two sides of the pond.
the icon is a box in a boxthat a device is double insulated before buying it?
cant sayabsolutely sure
Armeg solid board cutter.With my installation the electrician used a tool which cut a circle in the flooring in the loft with a ridge and dropped plastic covers over - so its still flush , but i can access various sections easy
not sure what the tool is called though - i thought i saw it in toolstation / wickes recently
Not cheap but save a lot of labour costs as quick to use. There are 2 sizes 111mm and 127mm. The 127mm covers tend to be a bit cheaper but the proper Armeg cutter for them is about £90
Indeed, at least some of it.If it is a bungalow, and the wiring is accessible, in the loft, it should be easy to rewire.
Again true, but some eyebrows (including those of the regs) might be raised if one ('easily') replaced cables within wall cavities with new cables within wall cavities, mightn't they?Wiring of that age was usually done properly, with conduit in the walls for the switch drops, and also cables in brick cavities - so replacing the wiring could be very easy.
Maybe, but you can't worry about everything.Indeed, at least some of it.
Again true, but some eyebrows (including those of the regs) might be raised if one ('easily') replaced cables within wall cavities with new cables within wall cavities, mightn't they?
Kind Regards, John
Why would they do that ‽
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local