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Junction box depth

Evening All, 

I typically wire lighting circuits with Hager JBs close. To the light switch drops, and I guess I have been lucky enough not to have come across thin loft joists before to ask this. 

I'm working on a house at the moment where the loft joists are thinner then I have seen, such they are equal to or slightly shorter than the Hager Junctions boxes I like to use, meaning the JBs would rest against the ceiling and protrude above the joist 

I can't point to a Reg that defines any requirements on this, so is that acceptable or would it be better to travel a few meters away from the switch drop to the joist binder beam that sits above the joists? 

Parents
  • Hi,

    Yes, MF ones

    It's a down light circuit, so no ceiling rose to loop through. I could loop at Light Switch box but is junction box not a cleaner way? 

Reply
  • Hi,

    Yes, MF ones

    It's a down light circuit, so no ceiling rose to loop through. I could loop at Light Switch box but is junction box not a cleaner way? 

Children
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