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Good Practice

RustyH

Just wondered

Does anyone else do these two things. 

1) add a radius to cables going trough and then along joists to put less stress on the cable with tight bends?

2) due to the nature of low cost manufacturing, I find the edges of the fire rated clips to be sharp enough to cut in to the insulation if any manoeuvring of cables is carry out. So I add a plastic clip at any bend or end of run, so give a "softer" fixture at any possible movement point.

Parents
  • 0

    1. Yes. I also like to leave a little slack at JBs.

    Supplementary question is do you clip cables to joists, or just leave them loafing on the top of the ceiling? (I am thinking of older properties which don't have wadding in the ceiling/floor void.)

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  • 0

    1. Yes. I also like to leave a little slack at JBs.

    Supplementary question is do you clip cables to joists, or just leave them loafing on the top of the ceiling? (I am thinking of older properties which don't have wadding in the ceiling/floor void.)

Children
  • 0 in reply to Chris Pearson

    I prefer to clip to joists, plus, it above a route classed as an escape, don't they need to be fire cliped?

    Another supplementry queston....... What about cables in old property lofts, we're the joists are barely 80mm think, and therefore can not meet the 50mm requirement from the bottom.

    I read once that the 50mm only applies to through joist holes, but someone did point out the vulnerability of someone miss g the joists if screwing in to the ceiling and hitting a side clipped cable below 50mm requirement.

    So are you then better to just float on ceiling or insulation 

  • 0 in reply to RustyH

     "What about cables in old property lofts, we're the joists are barely 80mm think, and therefore can not meet the 50mm requirement from the bottom."

    Well if it is 50mm from the underside of the joist then it`s "OK" -  If the topside does not normally have traffic and is not hidden by boards. Is our 50mm minimum a satisfactory distance? cables rested on ceiling and not restrained do have a chance that they would often be nudged out of the way by any nail/screw/drilling although no guarantee on that one.

    Do we always use screws 50mm or less to fix to walls/ceilings ??? 

    I saw an "door entry system engineer" drilling holes thru the ceilings and up thru the floorboards above with first removing a piece of floorboard to confirm no pipes/cables in the proposed route, said he`d never had such an accident even though he`d done loads of `em. Did make me cringe though! Having said that, against my advice he did wire a door entry system to a semi detached house with the bell push on the front door and the door lock mechanism on the back door and I was called to attend with him 12 months later to correct this - I am not kidding!

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Community Rules & Guidelines