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Eaton Glasgow Screw Torque

Will Elec

Hi all,

Just installing a glasgow 104gc switch disconnector. Instructions state 10Nm for terminals, so get torquing and the first screw breaks! As this is a TP+SN unit there is no netural bar but the instructions state 3Nm for neutral, so torque all other terminals to 3Nm and no problem!

Phoned Eaton technical and they insist that the terminals should be 10Nm - which for a small tinned brass flat head screw seems excessive! All the Schneider gear using similiar terminals I have fitted seems to be 3.5Nm and they have a far better combination pozi head.

Anyway, would appreciate some thoughts on this. I must admit I'm happy with 3Nm on the terminals but the regs say to follow the manufactures guidance....

Thanks

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  • 0
    Will Elec said:
    the instructions state 3Nm for neutral

    Don't they say 3 Nm for the 'neutral link' screws, all incoming/outgoing terminals are I believe listed as 10 Nm, at least according to this instruction leaflet: https://www.eaton.com/content/dam/eaton/products/low-voltage-power-distribution-controls-systems/lt835-instruction-leaflet.pdf ?

  • 0 in reply to gkenyon

    Yes they do, the terminal in the pictures is one of the incoming/outgoing. The 104gc doesn't have the neutral link but I just tried the 3Nm to see how it felt in terms of clamping effectiveness on the cable. 10Nm with such a small screw just feels very hard to achieve!

  • 0 in reply to Will Elec

    I think the only people who can answer this are Eaton themselves.

    Have you discussed the breakage with them?

  • 0 in reply to gkenyon

    I have yes, they insisted on 10Nm but the tech i spoke to seemed to be just quoting the pdf you have linked to.. I guess it begs the question of how close you should follow the manufactures advice when in the real world it seems incorrect..

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  • 0 in reply to gkenyon

    I have yes, they insisted on 10Nm but the tech i spoke to seemed to be just quoting the pdf you have linked to.. I guess it begs the question of how close you should follow the manufactures advice when in the real world it seems incorrect..

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