schedule 80 and rigid

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I don't believe that it's = to rigid, I don't know how it could be since it's plastic.

Some places around here require it to be schedule 80 if it's coming out of the ground. Nothing in the code says you can't have schedule 40 coming out of the ground or have emt exposed for that matter. So the only place you really need rigid is in H locations and long drops and you can't use schedule 80 in those places instead. Also neither schedule 40 or 80 are mentioned in the NEC that I know of, all it mentions is Rigid Nonmetallic Conduit.
 
I was under the understanding that PVC schedule 80 can be used in substitution to rigid under certain applications. Was I mislead?

"Also neither schedule 40 or 80 are mentioned in the NEC that I know of, all it mentions is Rigid Nonmetallic Conduit." Never thought of that.

JJ
 
JJWalecka said:
I was under the understanding that PVC schedule 80 can be used in substitution to rigid under certain applications. Was I mislead?
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No you where not mislead, Schedule 80 can be used where it is expossed to physical damage just like RMC.

Is it as tough as RMC? Heck no.
 
From the UL White book;


The marking ??Schedule 80 PVC?? identifies conduit suitable for use where​
exposed to physical damage and for installation on poles in accordance with the NEC.
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Roger​
 
The UL white book states that schedule 40 conduit is suitable for underground use by direct burial or encasement in concrete. Some is marked "Directional Boring" and is suitable for that application. Schedule 80 conduit is suitable for use wherever schedule 40 conduit may be used. The marking "Schedule 80 PVC" identifies conduit suitable for use where exposed to physical damage and for installation on poles in accordance with the NEC.
 
JJWalecka said:
How is schedule 80 P.V.C equivalent to rigid conduit? Does anyone know the technical data?
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Its not equivalent. PVC is a great choice for some things, and rigid is a good choice for others.

Technical specs are readily available from the manufacturer, usually on their web site.
 
Well for one thing, compared to RGC, Sched 80 ain't a conductor! ;-) so you can't use it or any PVC where you need the conduit to serve as the EGC or as a redundant EGC such as in medical facilities. I guess you could pull two EGC's in PVC???

RC
 
Ragin Cajun said:
Well for one thing, compared to RGC, Sched 80 ain't a conductor! ;-) so you can't use it or any PVC where you need the conduit to serve as the EGC or as a redundant EGC such as in medical facilities. I guess you could pull two EGC's in PVC???

RC
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Can't use pvc for receptacles in health care 517.13(B) requires equipment grounding conductor to be insulated copper and installed in metal raceways or part of a listed cable having a metallic armor or sheath.
 
I would love to see PVC used as a mast or riser for the attachment of the service drop. :rolleyes:
 
cowboyjwc said:
Also neither schedule 40 or 80 are mentioned in the NEC that I know of, all it mentions is Rigid Nonmetallic Conduit.
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In the 2008 NEC the only place I found it is:

352.10 (F) Exposed: PVC Conduit shall be permitted for exposed work. PVC conduit used exposed in areas of physical damage shall be identified for the use.

FPN: PVC Conduit, Type Schedule 80, is identified for areas of physical damage.
 
JJWalecka said:
I was under the understanding that PVC schedule 80 can be used in substitution to rigid under certain applications. Was I mislead?

"Also neither schedule 40 or 80 are mentioned in the NEC that I know of, all it mentions is Rigid Nonmetallic Conduit." Never thought of that.

JJ
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Rigid non metallic conduit is no longer in the 08 NEC. Its now PVC Sch 40 or 80

Both UL and the NEC require Sch 80 PVC if installed where it could be damaged and specifically on poles Sch 80 is required.
 
This reminds me... I was on a job last week. We ran a 40A sub panel out to a building. I used 3/4 GRC. It was sitting in a trench well below the nec minimum of 6".

This other electrician the customer hired to hook the panel up was on site and looked at the GRC and said "Whyd you use metal? You know that will rot out in a few years."

I replied: "Because we hand dig our shorter trenches, and If we use rigid, we dont have to dig as deep"

He says back: "You should have just used PVC schedule 80... its the same thing, you can bury it at 6 inches too"

I look at him with a sonmewhat disgusted look and reply "Allright" and walk away.

By some of the other things I saw him do / say, really made me question if he was an electrician or just this customers friend doing some DIY.

Anyway.. rant is over.

~Matt
 
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