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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
  • I don't under stand the need to use junction boxes for a rewire? I assume you are using J804 maintenance-free ones?

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  • I don't under stand the need to use junction boxes for a rewire? I assume you are using J804 maintenance-free ones?

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