Why can’t I treat the SWA cable like a regular T&E in this situation? Remove outer sheath, connect L and N to the light and earth to a Wago or something similar to maintain continuity across the circuit? Given that the SWA is buried in the cement, there is no risk of it dropping through.
Terminating an armoured cable
- Thread starter Jupiter01
- Start date
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You need to sandwich the banjo between two locknuts. It's no use just tightening it down to a plastic enclosure.
No it isn't. May give you problems with dissimilar metals too.
Please explain more where such a problem lies with anything I've described.
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Can someone help me with the above please?
I've not worked with SWA previously and am probably missing something...
Thanks again.
looking at the terminal with the bracket, if the bracket just had a hole in it and you then glanded the cable to the bracket it would be neater
I don't quite follow your comment. These products are used instead of brass glands, where a brass gland is not a suitable or too big/bulky product.
A 20mm gland would probably fit to that bracket and to me at least would be a better termination than bent over wires and a jubilee clip
Any old bit of bent metal will do that just as well.
The whole point of these is to use in situations where a brass gland is less appropriate for whatever reason. These are commercially produced and many thousands of such systems have been in use for years, As said before a brass gland is not the only way.
To fit inside the OPs enclosure the device without the bracket may fit, where a brass gland is less likely to, and yes I have been in that situation and all too often.
I am still trying to understand why the SWA cable behind the light can't be unsheathed and handled like you would with a conventional T&E cable i.e. pop the live and neutral into the light and have continuity across the earth by using a suitable connector.
Why is some form of glanding necessary behind the light when the cable is buried in concrete and has no where to go? I do understand why it is required on the end where it enters the house.
Can you help me understand this please. Thanks again.
Why is some form of glanding necessary behind the light when the cable is buried in concrete and has no where to go? I do understand why it is required on the end where it enters the house.
Can you help me understand this please. Thanks again.
When the steel strands used to armour the cable are cut there will be hard pointed ends that could puncture the insulation overtime.
A metal gland protects the conductors from damage from the cut strands
A metal gland protects the conductors from damage from the cut strands
got it!
Whilst I could use some of the specific products mentioned in this discussion, presumably I could also use a regular gland and just have it hanging mid-air, behind my light? i.e. it does not need to be clamped onto the hole in the back box.
I think I still have room behind the light and also, my gland doesn't need to be too chunky as I only have a 1.5mm SWA cable.
My initial confusion was based on the above "having" to be clamped around the hole in my plastic back box and I couldn't see how I would get access underneath the box as it's now plastered in. If the primary purpose of this - in my situation - is to protect the cables from being punctured, I would think my approach of having these glands mid-air (behind the light) would suffice.
Can you please provide your thoughts on this. Really appreciate the support.
Main problem with your floating gland is you then have cores with only primary insulation exposed. You could i suppose sleeve them with some secondary (mechanical protection) insulation but it would still be rather shoddy.
Couple of alternatives;
Fix another backbox to the buried backbox, terminate in that, fix lamp.
Chop the plaster out so you can get a gland into the buried backbox
Couple of alternatives;
Fix another backbox to the buried backbox, terminate in that, fix lamp.
Chop the plaster out so you can get a gland into the buried backbox
..and fill it with jel or compound to prevent water entering.
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