For installation of a Tesla Gen 3 EVSE the manual requires the terminal screws be tightened to 50 lbf.in torque and recommends wire from #12-#4 gauge with #6 gauge wire used for a maximum possible charge.

Since wire with a smaller diameter than #6 gauge wire can be used, especially for the grounding conductor, can someone speak to a recommended adjusted torque value as to not damage/crush the smaller gauge wire that might occur when 50 lbf.in torque is applied. For example, the circuit breaker torque recommendations vary based on wire size and #8 gauge wire and smaller require lower torque settings than #4 and #6 gauge wire.

  • 1
    Note that this is inch pounds, not foot pounds. You can do 50 inch pounds with a simple torque screwdriver. It takes the lever arm of a torque wrench to get to 50 foot pounds. It's a lot less pressure than you'd think, though 40 In/lb will deform #12 wire a bit. However, the device is designed for that.
    – FreeMan
    Commented Nov 14, 2023 at 23:50

1 Answer 1


It's a UL listed device. When installing a UL listed device, the instructions in the manual are the ones you follow. The instructions say torque to 5.6Nm, so you torque to 5.6Nm. Don't second-guess the engineers who designed the unit or the ones who certified the EVSE. Torque the connections to 5.6Nm.

  • I tried to up vote this again, but it took it away, so I had to up vote it a 3rd time!
    – FreeMan
    Commented Nov 15, 2023 at 0:35

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.