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Minimum/maximum cable sizes in terminations

Baldyhugh

Evening all

In the absence of technical info from manufacturers, how do you determine the minimum and maximum sizes of cables in terminations. Probably more the minimum size actually. Take a standard socket outlet or spur, could have as small as 1.5mm t&e with a 1mm earth. I find in this case especially that the 1mm struggles to get firmly held with the screw, more so the square type nowadays, the older round tunnel type were better. Is everyone saying if it passes a pull test, it’s acceptable?

Peter

  • 0 in reply to gkenyon

    The adverts seem to show smaller tunnels for the CPC, but in any event 2.5 mm² and 4 mm² T&E both have a 1.5 mm CPC. If the technical specs are online, I cannot find them. I wonder whether they could handle a full-sized CPC if wired in singles?

  • 0 in reply to Chris Pearson
    Chris Pearson said:
    the technical specs are online, I cannot find them.

    The one's I've seen just say "capacity" (which means they can hold less ... just doesn't tell us how much less).

  • 0 in reply to RB1981

    Are the lever clamp ones for portable socket outlets - i.e. extension lead use, or do we interpret that flex size requirement  to also include sockets for fixed (to me "non-portable") wiring ?

    Mike

  • 0 in reply to mapj1
    mapj1 said:
    Are the lever clamp ones for portable socket outlets - i.e. extension lead use, or do we interpret that flex size requirement  to also include sockets for fixed (to me "non-portable") wiring ?

    Not associated according to the standard.

  • 0 in reply to gkenyon

    That’s the jist of my point. You will soon be able to determine if a cable is too large for a terminal as it won’t fit in, but a smaller one will obviously fit in the terminal, however the important thing is whether it will be clamped securely. This is where in the absence of technical data,technical judgement comes in.

  • 0 in reply to Baldyhugh
    Baldyhugh said:
    This is where in the absence of technical data,technical judgement comes in

    Is the technical data actually absent? I've not scoured the internet or enquired myself, but the short-form "data sheet" isn't really a full specification, is it?

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