Question on Schedule 80 PVC pipe in trench???

[jango]

Can someone point out the required depth in a trench in general landscaping at a residence for schedule 80 PVC that will contain 120V and 240V wiring? I know schedule 40 is required to be 18" but can the trench be more shallow with schedule 80 PVC? Thanks!

 

[dcspector]

Can someone point out the required depth in a trench in general landscaping at a residence for schedule 80 PVC that will contain 120V and 240V wiring? I know schedule 40 is required to be 18" but can the trench be more shallow with schedule 80 PVC? Thanks!

See table 300.5

 

[raider1]

but can the trench be more shallow with schedule 80 PVC? Thanks!

Nope, there is no relaxed burial rules for Schedule 80 PVC.

Chris

 

[cowboyjwc]

There is no difference in the NEC between schedule 40 and 80. They are both considered Nonmetallic Raceways.

 

[jango]

Thanks everyone, I appreciate the responses.

 

[tom baker]

There is no difference in the NEC between schedule 40 and 80. They are both considered Nonmetallic Raceways.

Sorry, there is. The NEC requires Sch 80 in locations exposed to damage, such as on a pole. This was added in the 05 NEC and mirrors the UL White Book....

 

[Buck Parrish]

Yes I agree, Theroy is that a weed eater might "well eat" scedule 40" and not 80. Go figure.
I can't tell much difference. Accept 80 is more brittle.

 

[Pierre C Belarge]

also, schedule 80 can be buried where exposed to physical damage, where as schedule 40 cannot.

 

[1793]

There is no difference in the NEC between schedule 40 and 80. They are both considered Nonmetallic Raceways.

I've noticed that Sch 80 has quite a bit thicker wall and the internal diameter is smaller.

 

[cowboyjwc]

Sorry, there is. The NEC requires Sch 80 in locations exposed to damage, such as on a pole. This was added in the 05 NEC and mirrors the UL White Book....

Code section please.

 

[cowboyjwc]

I've noticed that Sch 80 has quite a bit thicker wall and the internal diameter is smaller.

I didn't say there wasn't a difference in the pipe, I said the NEC doesn't recognize it.

 

[1793]

I didn't say there wasn't a difference in the pipe, I said the NEC doesn't recognize it.

You are correct, my "bad", I posted to the wrong "Quote".

This is what I thought I was Quoting:

Yes I agree, Theroy is that a weed eater might "well eat" scedule 40" and not 80. Go figure.
I can't tell much difference. Accept 80 is more brittle.

 

[cowboyjwc]

You are correct, my "bad", I posted to the wrong "Quote".

This is what I thought I was Quoting:

OK then, now that you have felt my rath, let's not have it happen again.:grin::grin: