schedule 80

[paul renshaw]

What determines when something is subject to physical damage? Is there a specific section or guideline that clarifies the use of schedule 80 pvc when coming above ground in a conduit run, not for direct buried cables?

 

[haskindm]

Short answer, no. This is a determination that is made by the AHJ. The code does not clearly define what constitutes "subject to physical damage".

 

[Buck Parrish]

AHJ's have been making us use schedule 80 pvc.
They say because of high powered weed eaters.

 

[tom baker]

The UL white book listing requires Sch 80 to be used on a pole- its essentially saying that Sch 80 is = to RMC. Other than that the AHJ would make the call.

 

[Dennis Alwon]

What determines when something is subject to physical damage? Is there a specific section or guideline that clarifies the use of schedule 80 pvc when coming above ground in a conduit run, not for direct buried cables?

We have one jurisdiction that says you must use schedule 80 whenever it emerges from the ground. I think that it is a very wide open for interpretation rule.

 

[cadpoint]

Maybe its our own 110.3 ! Catch 22 !

The power of the modern day weed wacker is really the problem !

Besides just get them out of the ground, 90? then vertical, maybe include that cool look'n PVC expansion...

 

[infinity]

The UL white book listing requires Sch 80 to be used on a pole- its essentially saying that Sch 80 is = to RMC.

Yes, there are cases where they're interchangeable but I don't think that anyone can disagree that RMC is much stronger.