Thanks for all the thoughts so far everyone.

 

Probably by calculation, but could be experimental.

Clearly a great deal depends upon the materials. Also, pinching a copper conductor is rather different from, for example, taking the varying load of a con-rod's big end, but there are some guidelines here.

Thanks for the link Chris, one to keep to hand. This is the kind of thing I was looking for and it'd be great to have a similar table for copper / tinned copper / alu / tinned alu etc.


I've found the Copper Development Association's guidance document which has typical torque settings for various sizes but manufacturer's recommendations don't always fall particularly close... for an M10 bolted termination I can be quoted anything from 13Nm at the device at one end of a cable to 60Nm on the device at the other! Maybe it really is that it's calculated in detail and there's a wide range of sensible answers without detailed analysis, which I'll not have the data for.


Jam

Thanks for all the thoughts so far everyone.

 

Probably by calculation, but could be experimental.

Clearly a great deal depends upon the materials. Also, pinching a copper conductor is rather different from, for example, taking the varying load of a con-rod's big end, but there are some guidelines here.

Thanks for the link Chris, one to keep to hand. This is the kind of thing I was looking for and it'd be great to have a similar table for copper / tinned copper / alu / tinned alu etc.


I've found the Copper Development Association's guidance document which has typical torque settings for various sizes but manufacturer's recommendations don't always fall particularly close... for an M10 bolted termination I can be quoted anything from 13Nm at the device at one end of a cable to 60Nm on the device at the other! Maybe it really is that it's calculated in detail and there's a wide range of sensible answers without detailed analysis, which I'll not have the data for.


Jam