The meter tails have been moved from the top of my consumer unit to the side. This has left the 32mm knockout on top, open. Is there a simple fitting that I can use to blank it back off? I've used the smaller blanking plugs on surface mounted boxes, but can't find one for a 32mm hole.
Plugging 32mm knock out in CU
- Thread starter williamglossop
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If you google 32mm blanking plug, there are plenty.
e.g. https://www.cef.co.uk/catalogue/pro...liI9jQvNgHmTGkwgvSRoCpgAQAvD_BwE&gclsrc=aw.ds
Under current rules/guidance are 'plastic' blanking plugs verified as suitable for use in non-flammable consumer units
Interesting question, but there seems to be no concern about using 'plastic' cable glands (with cables, consisting largely of 'plastic', passing through them) - and I don't see a 'plastic' blanking plug as being materially different from that.
Don't forget that one can have as many ('open') 12mm diameter holes as one likes in the front, sides and bottom of a CU made of 'non-combustible' material and still be compliant with the current regs.
Kind Regards, John
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Like that solution!
Assuming that vyou are referring to the most recent post, that is, of course, essentially what "repair washers" are designed for.
I suppose that if the paint/coating remained on the case it might, at least in theory, be desirable to use the 'small nut and bolt' to 'earth' the washers with a bit of G/Y.
Kind Regards, John
I’ve used these for plugging open holes in consumer units, they’re a really tight fit so no chance of them coming out.
https://www.alertelectrical.com/wiska-quixx-kit-membrane-grommet-emf-f-kit.html
https://www.alertelectrical.com/wiska-quixx-kit-membrane-grommet-emf-f-kit.html
They are plastic, and concerns have been voiced above (I think quite probably unnecessarily, given what glands are commonly used) about the appropriateness of plastic plugs in a CU which is required to be 'non-combustible' (in practice, essentially, metal).
Kind Regards, John
Add a third 'smaller' washer as close as possible to 32mm in the middle so it cant slip sideways. It doesn't matter if it's not tight.
Trut, but if 'it' (the 'small nut and bolt') is tight, then one doesn't need the third washer
Kind Regards, John
I've seen too many that have been knocked during later worksTrut, but if 'it' (the 'small nut and bolt') is tight, then one doesn't need the third washer
Kind Regards, John
If the centre bolt is tightened fully it will pull the centres together and should prevent them moving under all but the most hardest of knocks. I would be worried if someone was doing something near a CU that could, potentially, have enough force to knock it off the wall.
Regarding the earthing, I don't really see the need as the CU casing is probably painted inside and out anyway with just the standard earth point as the means to earth the unit.
Regarding the earthing, I don't really see the need as the CU casing is probably painted inside and out anyway with just the standard earth point as the means to earth the unit.
Totally agree with you, they are compliant yet you can argue that they’re not! It’s a complete mine field. I tend to use/suggest them as you don’t need to open the consumer unit to fit them and they are better than a gaping hole at least.
All I can add to that is I've seen this sort of blanking arrangement a number of times where the washers do not completely cover the hole and sometimes with a large gap so I'll amend my earlier post.
I've seen too many that have beenknocked during later worksfitted incorrectly.
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