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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

  • 0 in reply to gkenyon

    I may have started with my left-handed screwdriver by mistake. Wink Definitely M8 x 1.25 ≈ 20 tpi, which does not tally with any of 5/16 UNF/UNC/BSF/BSW.

    The problem is that so many screwdrivers have faces which are not parallel so they never really fit even when the thickness and width are about right.

    As far as I can tell, my original screws are stainless steel and not brass. Certainly the replacements are.

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