How tight?

[ptonsparky]

Had to connect our SE conductors to a POCO transformer a couple days ago. Pad mount. Their techs said they never connect the secondaries. Ok. How tight, I ask holding up my torque wrench. Tight was the answer. We went to 275 inch lbs because that is typical for a 5/16 hex head. One of few times I wasn't happy with POCO answers.

275 seem right...not that am changing it now?

 

[K8MHZ]

Had to connect our SE conductors to a POCO transformer a couple days ago. Pad mount. Their techs said they never connect the secondaries. Ok. How tight, I ask holding up my torque wrench. Tight was the answer. We went to 275 inch lbs because that is typical for a 5/16 hex head. One of few times I wasn't happy with POCO answers.

275 seem right...not that am changing it now?

Tighten them down 'till they break, then back off 1/8th of a turn.

I have never seen a POCO use a torque wrench, but they do have some cool electric impacts they rattle down all their fasteners with.

 

[Knightryder12]

Had to connect our SE conductors to a POCO transformer a couple days ago. Pad mount. Their techs said they never connect the secondaries. Ok. How tight, I ask holding up my torque wrench. Tight was the answer. We went to 275 inch lbs because that is typical for a 5/16 hex head. One of few times I wasn't happy with POCO answers.

275 seem right...not that am changing it now?

WOW.... That wouldn't happen here. POCO doesn't want anyone else in their transformers at all. They always hook up secondary conductors.

 

[templdl]

Had to connect our SE conductors to a POCO transformer a couple days ago. Pad mount. Their techs said they never connect the secondaries. Ok. How tight, I ask holding up my torque wrench. Tight was the answer. We went to 275 inch lbs because that is typical for a 5/16 hex head. One of few times I wasn't happy with POCO answers.

275 seem right...not that am changing it now?

That is just what I would suggest. With molded case breakers the actual listed torque ratings for the terminals is based on exactly what you are doing.which is what is also used with the UL486 listing requirements for breaker terminals. Any more torque would be reasonable and neither would less torque.
In my opinion you did good.

 

[big john]

In the absence of connector specs, look up the ANSI/NETA table 100.12 for bolted connection torques, and NEC/UL Annex I for hex/screw lug torque.

If you had copper wire in a mechanical lug, NEC/UL table puts you right at 275 inch-pounds. Hard to argue with that.