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#92735 - 04/05/05 11:55 AM schedule 40 pvc  
sid123456  Offline
Member
Joined: Jan 2005
Posts: 71
Florida
Is it permissable to use sch 40 for service entrance up a wall if it does not go through the roof? I know underground is sch 80.


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#92736 - 04/05/05 12:35 PM Re: schedule 40 pvc  
watthead  Offline
Member
Joined: Oct 2001
Posts: 172
South Carolina
If it is ok to use SEU or SER I don't see a problem with Sch 40 pvc, and neither have any of my inspectors so far. Although some have asked how my pipe fits so nicely around drip cap etc.. Like they didn't know that if you heat it pvc will bend.


#92737 - 09/26/05 12:09 AM Re: schedule 40 pvc  
Tripp  Offline
Member
Joined: Sep 2005
Posts: 99
Just came across this thread...5 months later! But to add my two cents to your last sentence, Member "sid", my understanding of the NEC is that:

Schedule 40 is suitable for underground, while it is Schedule 80 that is used more for exposed work, i.e., that is likely to be subject to damage.

Anybody still out there on this thread?



[This message has been edited by Tripp (edited 09-26-2005).]


#92738 - 09/27/05 04:41 AM Re: schedule 40 pvc  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Schedule 40 dominates the market utterly.

It is used above ground and underground. Wherever you might think to use plastic -- Schedule 40 PVC 'owns' the market.

Schedule 80 is used but rarely. It has a tighter interior dimension and costs more. Hence it is only used when the raceway is exposed to damage.

I work commercial. If any pipe is at risk for 'damage' it is protected by bollards, etc. Schedule 40 rules.

Schedule 80 is practically never used underground. What would be the point?


Tesla

#92739 - 09/27/05 12:23 PM Re: schedule 40 pvc  
macmikeman  Offline
Member
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
Quote"Schedule 80 is practically never used underground. What would be the point?

The point would be that the poco where I work will not allow any service lateral under a street or driveway in sch 40, they demand sch 80 for those area's and won't supply power until it is sch 80.


#92740 - 09/27/05 08:59 PM Re: schedule 40 pvc  
BobH  Offline
Member
Joined: Oct 2004
Posts: 135
Newfane, N.Y USA
Ah c'mon, he just said sch. 40 "rules" and "utterly". What more do you want? [Linked Image]

[This message has been edited by BobH (edited 09-27-2005).]


#92741 - 09/28/05 08:22 PM Re: schedule 40 pvc  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
"Schedule 40 is suitable for underground, while it is Schedule 80 that is used more for exposed work, i.e., that is likely to be subject to damage."

Like, for instance, when doing a service upgrade on a house where the driveway is within' 3 ft of the RNC?


#92742 - 09/28/05 11:56 PM Re: schedule 40 pvc  
Tripp  Offline
Member
Joined: Sep 2005
Posts: 99
"...Shedule 80 is used more for exposed work, i.e., that is likely to be subject to damage."

ShockMe77: "Like, for instance,..."

Like anywhere aboveground, duh. [Linked Image] In our neck of the woods, we run Sch. 40 underground, but where it exits the trench, we switch to Sch. 80, anywhere up to 8' above the ground. This is what the AHJ demands.

And regardless of how our AHJ differs from yours, Tesla, refer to NEC 300.5(D)(1) & (4), NEC 300.50(B), and the 2004 UL WhiteBook. [Linked Image]

So unless the definition of a "bollard, etc." is the same definition i would find for Schedule 80 PVC, I'd had to conclude that Tesla is in violation of the NEC when running Sch.40 where "any pipe is at risk for damage."

[This message has been edited by Tripp (edited 09-29-2005).]


#92743 - 09/29/05 06:04 AM Re: schedule 40 pvc  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Quote
So unless the definition of a "bollard, etc." is the same definition i would find for Schedule 80 PVC, I'd had to conclude that Tesla is in violation of the NEC when running Sch.40 where "any pipe is at risk for damage."


I can not agree with you here.

If the the AHJ feels the bollards prevent the PVC from being exposed to physical damage then the PVC can be Sch. 40.

The 'definition' or determination of exposed to physical damage is entirely up to the inspector / AHJ.

I personally do not like exposed PVC at all and most times that I am forced to use it exposed I use 80. [Linked Image]

Coming up out of the ground I use RMC, RMC is also what the local power companies require when placing a riser on their poles. [Linked Image]


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#92744 - 09/30/05 05:59 PM Re: schedule 40 pvc  
Tripp  Offline
Member
Joined: Sep 2005
Posts: 99
iwire: I agree with you that it is up to the AHJ to determine what constitutes "likely to be subject to damage." However, once that determination is made, I think (and I say "I think" here because my codebook is not in front of me: the surgery is complete and we have been successfully separated! [Linked Image] ) that 300.5 (D) (1) & (4) mandates use of Schedule 80. Now I could look this up again in an hour and find i have made a complete fool of myself, so we'll see. But i did look it up before my last post, in which i referenced it, so i'm goin with my gut here.


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