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Torque settings

Jam
Hi all,


Obviously, where available we use manufacturer's torque settings for connections. But where do they get them from?


I ask this not least because it's not always easy to obtain, at least in a timely fashion, but also because I appear to have conflicting instructions on some OEM'd equipment (comparing the original manufacturer with the wrapped supplier) or notably different settings when using the same lug onto a very similar terminal bar from a different supplier. It would also be helpful to be able to sense-check the answers for misplaced decimal points.


Jam
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    This week I was installing an M.K. switched fused connection unit with the neon light in the switch. A very neat design, BUT the terminal screws are very well gripped in the terminals from new, BEFORE you start to tighten them down. I imagine that some torque screwdrivers would indicate a full tightness even BEFORE the screw secures the conductor. I really struggled to get the screws to initially start rotating.


    Z.
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  • 0
    This week I was installing an M.K. switched fused connection unit with the neon light in the switch. A very neat design, BUT the terminal screws are very well gripped in the terminals from new, BEFORE you start to tighten them down. I imagine that some torque screwdrivers would indicate a full tightness even BEFORE the screw secures the conductor. I really struggled to get the screws to initially start rotating.


    Z.
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