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Neural connections inaccessible on Lewden RCBO's

Alan B

Hi

I am coming across more curve consumer units with Lewden RCBO's in and they are causing me a dilemma.

As you will see in the picture the line conductors pass straight in front of the neutral terminal screw, the only way to check torque on the neutral is to remove the line conductors or risk damaging them.

So far providing the line terminals are tight I have not checked the neutrals as I believe i would be doing more harm than good with work hardening and flattening of conductors, and noting this on my report.

What would you do in this sittuation?

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  • 0

    well I have a pair of wire bending pliers (the ones with two shaped cones instead of jaws) for forming tightest possible loops without breaking the official bending radius, and they are designed to be pretty gentle on insulation (*), but I also have some more  normal long nose pliers that have been sleeved with heatshring for handling delicate things. From time to time it needs redoing.
    I'm not aware of anything sold specially as wire tugging pliers in any catalogue, but there may be.
    Jewelers style tools often include nylon tips, but they tend to be the half circle "chain nose", rather than "round nose" profile, and it is a pretty hard nylon, and for this  something with a bit of 'give' to allow the jaw to deform  rather than the insulation when gripping on the wire giving way might be better.

    I suspect to be honest the tape idea is as good as the heatshrink, and reversible.

     * I'll admit to hand forming loops in wires as well, when its not a Mil Std job, it is a lot faster..

    Mike.

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  • 0

    well I have a pair of wire bending pliers (the ones with two shaped cones instead of jaws) for forming tightest possible loops without breaking the official bending radius, and they are designed to be pretty gentle on insulation (*), but I also have some more  normal long nose pliers that have been sleeved with heatshring for handling delicate things. From time to time it needs redoing.
    I'm not aware of anything sold specially as wire tugging pliers in any catalogue, but there may be.
    Jewelers style tools often include nylon tips, but they tend to be the half circle "chain nose", rather than "round nose" profile, and it is a pretty hard nylon, and for this  something with a bit of 'give' to allow the jaw to deform  rather than the insulation when gripping on the wire giving way might be better.

    I suspect to be honest the tape idea is as good as the heatshrink, and reversible.

     * I'll admit to hand forming loops in wires as well, when its not a Mil Std job, it is a lot faster..

    Mike.

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