Lighting junction box to put into ceiling

[donnyb]

Morning all,

I have ceiling light (batten? a normal bulb held in a fitting like a ceiling rose without a flex) in my porch I want to replace with a flush fit dome light. Porch has a flat roof so I can't get to the top side of my ceiling without removing the roof, as such I can't screw anything down within the ceiling.

I'd like a junction box that I can wire up and stuff into the hole in my ceiling, up into the cavity, then have another cable leading to the flush fit light dome. Are they supposed to be secured to a joist or similar, or is "stuffed into the ceiling cavity" sufficient?

I've seen it done with unenclosed choc blocks, but that seems dodgy.

Thanks in advance,

Donny

 

[DaveHerns]

Is there not enough slack in the cable so you can pull it down into your new fitting ? Otherwise you'd need a MF junction box and I'm assuming above the ceiling is dry

 

[donnyb]

Is there not enough slack in the cable so you can pull it down into your new fitting ? Otherwise you'd need a MF junction box and I'm assuming above the ceiling is dry

Hi Dave, thanks for the response,

There is slack, but the fitting just has L N connections, so nowhere for me to connect up the wiring that would normally be in the ceiling rose. I didn't want choc blocks or similar inside the flush light in case it overheated.

I don't know if junction boxes need to be screwed in to a joist or similar? Any issues just tucking them in?

Above ceiling is dry, flat roof is currently in good nick. Consumer unit is also in the porch.

 

[EFLImpudence]

These are designed for 'stuffing in hole' IF you can get at them afterwards:
https://www.tlc-direct.co.uk/Products/ASJ501.html

If not accessible afterwards, then:
https://www.tlc-direct.co.uk/Products/ASJ804.html

 

[EFLImpudence]

Just seen your latest post - nothing wrong with connectors in the fitting.

 

[donnyb]

Thanks!

I'd be able to get it back out again as the hole above the light is quite large.

The first link, with the cable clamps looks ideal.


Out of interest, would a "chocbox" also be suitable (for future reference)?

 

[EFLImpudence]

Out of interest, would a "chocbox" also be suitable (for future reference)?

Yes, similar but not as good.

 

[ban-all-sheds]

If a connector is on cables attached to a light then it's accessible - remove the light, pull the cable, et voilà.

The problem is not so much one of accessibility, it's knowledge of the joint's presence.