We now know (post #6) that the cable is marked as 25 mm - but, as I've said, co-incidentally the outside diameter is likely to be very similar (I think around 24mm). However, as I've said more recently, I would have guessed (maybe incorrectly?) that a gland to take that would require a hole bigger than 25mm?Maybe it's the gland size.
Fair enoughhttps://www.enfieldelectrical.co.uk/pages/swa-cable-gland-chart suggests a 25mm gland is suitable for 25mm² 2 or 3 core SWA but 4 or 5 core needs a 32mm gland. I understand there can be some variability between brands though.
Sure, I realise that - which is why I said that I was not sure whether or not my guess was correct!Remember SWA glands are not like stuffing glands where the whole cable goes through the gland. The outer sheath and armour terminate outside the enclosure.
Wanted to practice the glanding process as that appeared to be the default approach. That's the only reason I wanted to terminate the gland somewhere.If you're trying to learn how to do this work, Why sre you talking about adding a totally unnecessary additional metal box?
There are other products besides brass glands.
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And when everybody gets an EV the dno supply cables will be warm as well....For a 7.5kW home charger, the manufacturers usually recommend at least 6mm² to reduce losses in the cable. I used 10mm² for mine; even then, it still gets warm to the touch.
I see a couple of issues here.If you're trying to learn how to do this work, Why sre you talking about adding a totally unnecessary additional metal box?
There are other products besides brass glands.
I think you are suggesting that I have an adaptable box near the CU. I gland into this and then take a sensibly sized cable into the Consumer unit. I appreciate that this will mean that the cable rating would be based on the smaller cable but 25mm is massively oversized and of course, this is a test rig...2. Some CUs can already be quite cramped and you are proposing bringing the whole cable into the enclosure rather than terminating it on the wall of the enclosure, which is likely to take up even more space in the enclosure.
I think several people, including myself, have suggested that. As plugwash has said, what Sunray has suggested is 'esoteric' (i.e. something that I have never heward of people doing, even if there is enough space in the CU).I think you are suggesting that I have an adaptable box near the CU. I gland into this and then take a sensibly sized cable into the Consumer unit.
The rating of the [protective device will obviously have to be below that of the part of the cable with the lowest CCC - which, in the cae you mention, would presumably be that of the bit of cable between SWA and CU. That bit of cable obviously also has to have a high enough CCC fopr the load and, as I've said before, given the 'over-sized' SWA, it makes sense for the OPD to be rated per the load, even if all of the cables would be OK with a higher-rated OK.I appreciate that this will mean that the cable rating would be based on the smaller cable but 25mm is massively oversized and of course, this is a test rig...
If I have understood this correctly,
I'm not sure why you ask this question again. As I said before, any box large enough to accommodate the SWA gland would do.I would appreciate any suggestions for this adaptable box please.
I take it you are refering to qualified/competent electricians?I see a couple of issues here.
1. They are esoteric,
I take it no one on here deals with street furniture then?I don't think i've ever heard anyone but you mention them
Maybe not but I've only ever purchased them from wholesalers.and the website has no information on price, minimum order quantities or similar.
Yes I agree CU's and other enclosures can be very cramped.2. Some CUs can already be quite cramped and you are proposing bringing the whole cable into the enclosure rather than terminating it on the wall of the enclosure, which is likely to take up even more space in the enclosure.
I think the question is (in this DIY forum) how often anyone (qualified/competent or not) has used the method you describe to terminate SWA in a domestic installation - and I suspect (but, as always, may be wrong!) that the answer is probably "almost never".I take it you are refering to qualified/competent electricians?
And why not when a brass gland into a plastic enclosure is not the most appropriate method?I think the question is (in this DIY forum) how often anyone (qualified/competent or not) has used the method you describe to terminate SWA in a domestic installation - and I suspect (but, as always, may be wrong!) that the answer is probably "almost never".
Kind Regards, John
You would have to ask those "who almost never do it" that question.And why not when a brass gland into a plastic enclosure is not the most appropriate method?
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