- Location
- Massachusetts
Can someone help me find the maximum allowable sidewall pressure for 500 and 600 kcmil copper XHHX-2?
I have asked an engineer to allow me to reduce some conduit sizes and he will allow it if I can show some evidence that the sidewall pressure will not damage the insulation.
Now I firmly believe that the size of the raceway will not change the pulling tension assuming the raceway is at least as large as the NEC requires.
But my believing that is not the same as being able to demonstrate it to the engineer.
For those that are interested the run in question is four 600 and one 250 copper XHHW-2.
The prints show 4" EMT and I want to run 3" EMT.
Thanks Bob
I have asked an engineer to allow me to reduce some conduit sizes and he will allow it if I can show some evidence that the sidewall pressure will not damage the insulation.
Now I firmly believe that the size of the raceway will not change the pulling tension assuming the raceway is at least as large as the NEC requires.
But my believing that is not the same as being able to demonstrate it to the engineer.
For those that are interested the run in question is four 600 and one 250 copper XHHW-2.
The prints show 4" EMT and I want to run 3" EMT.
Thanks Bob