- #1
MandyVol
- 2
- 0
I hope someone can help. I am an Production Engineer. We have a situation where we have to torque a 16mm copper cable in a box terminal by 4Nm. The cable will be used to carry a high electrical current.
We find that after torqueing (About 5 hours or so) the terminal can be re-tightened back to 4Nm.
I am told this is to do with Youngs Modulus and the characteristics of copper.
I have taken a look at Youngs Modulus but it all seems centred around the stretching of copper and not the compression / "squashing" of copper.
Would anyone know how to work out:
1. What interval we should wait before re-torque,
2. How many times you would need to re-torque,
3. Is re-torque the best option or is there an alternative.
4. Am I even on the right track with regards to Youngs Modulus or are there any other suggestions?
Any assitance would be greatly appreciated.
We find that after torqueing (About 5 hours or so) the terminal can be re-tightened back to 4Nm.
I am told this is to do with Youngs Modulus and the characteristics of copper.
I have taken a look at Youngs Modulus but it all seems centred around the stretching of copper and not the compression / "squashing" of copper.
Would anyone know how to work out:
1. What interval we should wait before re-torque,
2. How many times you would need to re-torque,
3. Is re-torque the best option or is there an alternative.
4. Am I even on the right track with regards to Youngs Modulus or are there any other suggestions?
Any assitance would be greatly appreciated.