just measured a greenbrook connector and its 42x22 and 46 across the diagonal so would easily fit through a 50mm hole
Small LED Ceiling Light
- Thread starter JohnW2
- Start date
Fair enough - I was merely gpingf by what the manufacturer says
Your 22 mm is close enough to the manufacturer's claimed 22.5 mm, but your 42 mm clearly much less than their claimed 55 mm - are you sure you measured the 'fattest' part? The manufacturer's claimed 55 x 22.5 would have a diagonal of about 59.4 mm, and hence would need a hole of at least 60 mm diameter, probably a little more.
[ To be pedantic, Mr Pythagoras thinks that 42 x 22 should have a diagonal of about 47.4, not 46 - but that still should just about go through a 50mm hole! ]
Is this any good?
two fixing screws for whatever light and could even be replaced by a bog standard rose and pendant if required it may or may not be covered by whichever light you fit and any wiring connections could be made off and terminated within the box.
two fixing screws for whatever light and could even be replaced by a bog standard rose and pendant if required it may or may not be covered by whichever light you fit and any wiring connections could be made off and terminated within the box.
Those round boxes require a 63mm hole. The 34mm description is slightly misleading as that is the depth
A ceiling rose is just a junction box that looks a bit prettier anyway
It is, but it would be nice if, like the 'full-size' ones we are used to, it had more terminals - i.e. three for the permananet live (in, out and 'to switch') and more than one terminal for CPCs.
As has been said, despite their only mentioning the depth, that one is 'quite big'.
A bit of an update, since I will soon be making a decision. As you may recall, with thoughts of 'who might replace the light fitting with what' in the future, my desire is to find an approach which minimises the size of the required hole in the ceiling.
I'm no great fan of 'non-accessible' JBs (whether they are 'MF' or not). However, since there is yet no ceiling, I do have the option to put some sort of JB above it which would not through the hole (at least, the 'initial hole') in the ceiling.
My current inclination is therefore to install a MF JB (J804 or Wagos in a Wagobox) above the ceiling, with 3-core flex coming from that for the light. If I can get easily 'into' the light fitting, that flex could be taken all the way to the light fitting or, alternatively, I could some sort of 'small' plug/socket that would fit through a small hole in the ceiling - something like this one, which would fit through a 35mm diameter {or 35mm x 20mm} hole. Should the need ever arise in the future, the hole could obviously be enlarged to allow the MF JB to be fished out.
What do folks think about that plan?
Kind Regards, John
I'm no great fan of 'non-accessible' JBs (whether they are 'MF' or not). However, since there is yet no ceiling, I do have the option to put some sort of JB above it which would not through the hole (at least, the 'initial hole') in the ceiling.
My current inclination is therefore to install a MF JB (J804 or Wagos in a Wagobox) above the ceiling, with 3-core flex coming from that for the light. If I can get easily 'into' the light fitting, that flex could be taken all the way to the light fitting or, alternatively, I could some sort of 'small' plug/socket that would fit through a small hole in the ceiling - something like this one, which would fit through a 35mm diameter {or 35mm x 20mm} hole. Should the need ever arise in the future, the hole could obviously be enlarged to allow the MF JB to be fished out.
What do folks think about that plan?
Kind Regards, John
This is better and designed to to the job:
Greenbrook Lighting Connector
A 3-pole 20A lighting connector for quick and efficient fitting of multiple downlights and lighting fixtures. With its simple lock-and-release system, it's so easy to wire up and connect - and just as easy to disconnect when maintenance is required. Suitable for a wide variety of connecting...
www.toolstation.com
We've been through all that earlier in this thread.This is better and designed to to the job: ...Greenbrook Lighting Connector
A 3-pole 20A lighting connector for quick and efficient fitting of multiple downlights and lighting fixtures. With its simple lock-and-release system, it's so easy to wire up and connect - and just as easy to disconnect when maintenance is required. Suitable for a wide variety of connecting...www.toolstation.com
That's really bigger (bigger hole in ceiling) than I would like. Furthermore, I think that I'd probably need the 4-pole version (which is probably even bigger?) - since, without bodging, I don't think there would be any where in a 3-pole one to parl the CPCs, would there?
That one has 4 (internal) contact points for the wires (L, N, Loop, E)
But you are correct it is only three external connections (L, N, E) - which is the same as your image.
There is a 4 pole version that is bigger.
But you are correct it is only three external connections (L, N, E) - which is the same as your image.
There is a 4 pole version that is bigger.
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I've just looked. The 4-pole opne is a bit bigger (113 x 55 x 22.5 vs. 110 x 42 x22.3), but it looks as if I would not need the 4-pole one. This diagram seems to indicate that, although there are only 3 pins, the 3-pole one has a fourth terminal ('Loop'). Does someone know if that is correct? ...
In passing, I found the following interesting statement on the datasheet. I presume that they are screwed terminals, so I don't think it can be 'MF' - so I wonder what this statement actually means? ...
Edit: hadn't see SFK's post when I wrote this
Kind Regards, John
Yes the four pole has three pins/sockets and a seperate loop terminal. But if you are going to fit a m/f box above the ceiling just bring out a 3core flex to the fitting.
It's a case or "either/or", rather than "both". If I had a hole in the ceiling large enough for the Greenbrook connector to pass through (and we've now established that a 3-pole one would be adequate), I would not need an MF JB above the ceiling.
The only reason I was thinking of the MF JB was that it would facilitate having an appreciable smaller (3-pole) connector (hence smaller hole in ceiling) downstream of it.
Given that any light fitting I was using would almost certainly be Class II, I suppose it could theoretically be 2-core cable and connector, but (as required by regs) 3-core would cater for any Class I fitting in the future! However, the 3-pole Greenbrook would go through a hole less than 50mm in diameter, so maybe that's the most sensible way to go. Do you agree?
Having just looked, the Scolmore ClickFlow and Volex equivalents to the Greenbrook connector look virtually identical to it (other than colour!!), but all are much the same size.
The scolomore click and the greenbrook are "chinese copies" of each other and are not interchangeable and are different colours too.
The Volex I have not seen ( actually I would not like to see anything Volex anywhere either)
The Volex I have not seen ( actually I would not like to see anything Volex anywhere either)
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