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Old 01-12-2012, 11:32 PM   #1
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Default Schedule 80 vs Schedule 40

I am feeding some 30 amp washer dryer plugs from a disconnect with about 24" to grade of exposed 3/4" PVC Conduit(Conduit is ran underground from the disco). I have always run Schedule 40 PVC on anything other than Service Entrance and am being told that Schedule 80 is required for this branch circuit Install. Anybody know the current code on this? :-)
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Old 01-12-2012, 11:36 PM   #2
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Is it spec'd that way?

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Old 01-12-2012, 11:38 PM   #3
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No Specs. Resi job on an existing apartment complex
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Old 01-12-2012, 11:49 PM   #4
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Quote:
Originally Posted by customelectric View Post
I am feeding some 30 amp washer dryer plugs from a disconnect with about 24" to grade of exposed 3/4" PVC Conduit(Conduit is ran underground from the disco). I have always run Schedule 40 PVC on anything other than Service Entrance and am being told that Schedule 80 is required for this branch circuit Install. Anybody know the current code on this? :-)
Thank you
Here it is..

Quote:
II. Installation
352.10 Uses Permitted. The use of PVC conduit shall be
permitted in accordance with 352.10(A) through (H).

Informational Note: Extreme cold may cause some nonmetallic
conduits to become brittle and, therefore, more
susceptible to damage from physical contact.

(A) Concealed. PVC conduit shall be permitted in walls,
floors, and ceilings.

(B) Corrosive Influences. PVC conduit shall be permitted
in locations subject to severe corrosive influences as covered
in 300.6 and where subject to chemicals for which the
materials are specifically approved.

(C) Cinders. PVC conduit shall be permitted in cinder fill.
350.30 ARTICLE 352— RIGID POLYVINYL CHLORIDE CONDUIT: TYPE PVC
70

(D) Wet Locations. PVC conduit shall be permitted in
portions of dairies, laundries, canneries, or other wet locations,
and in locations where walls are frequently washed,
the entire conduit system, including boxes and fittings used
therewith, shall be installed and equipped so as to prevent
water from entering the conduit. All supports, bolts, straps,
screws, and so forth, shall be of corrosion-resistant materials
or be protected against corrosion by approved corrosionresistant
materials.

(E) Dry and Damp Locations. PVC conduit shall be permitted
for use in dry and damp locations not prohibited by
352.12.

(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.

Informational Note: PVC Conduit, Type Schedule 80, is
identified for areas of physical damage.


(G) Underground Installations. For underground installations,
PVC shall be permitted for direct burial and underground
encased in concrete. See 300.5 and 300.50.

(H) Support of Conduit Bodies. PVC conduit shall be
permitted to support nonmetallic conduit bodies not larger
than the largest trade size of an entering raceway. These
conduit bodies shall not support luminaires or other equipment
and shall not contain devices other than splicing devices
as permitted by 110.14(B) and 314.16(C)(2).

(I) Insulation Temperature Limitations. Conductors or
cables rated at a temperature higher than the listed temperature
rating of PVC conduit shall be permitted to be installed
in PVC conduit, provided the conductors or cables are not
operated at a temperature higher than the listed temperature
rating of the PVC conduit.
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Old 01-12-2012, 11:52 PM   #5
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Damn... I've been getting away with Sched 40 for Years! Good to know and as always, I f'n love the gents on this site!
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Old 01-12-2012, 11:59 PM   #6
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Quote:
Originally Posted by customelectric View Post
Damn... I've been getting away with Sched 40 for Years! Good to know and as always, I f'n love the gents on this site!

Welcome to the forum...

We have fun here if you have questions just start a thread you will get an answer.

Last edited by HARRY304E; 01-13-2012 at 12:01 AM.
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Old 01-13-2012, 01:04 AM   #7
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We have to run in sch 80 up to 8 ft above ground, and 18 inches below.
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Old 01-13-2012, 09:44 PM   #8
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Informational Note: PVC Conduit, Type Schedule 80, is
identified for areas of physical damage.

what is the definition of "area of physical damage"?
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Old 01-13-2012, 09:49 PM   #9
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I just find the use of the word "plugs" by electricians interesting..
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Old 01-13-2012, 10:33 PM   #10
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Quote:
Originally Posted by zoltan View Post
Informational Note: PVC Conduit, Type Schedule 80, is
identified for areas of physical damage.

what is the definition of "area of physical damage"?
a place where a bike or shopping cart can crash into it..
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Old 01-16-2012, 05:02 PM   #11
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Ive never been required to run sch 80 before, but I was always under the impression that out was needed when doing an outside s service like a shopping center, on exposed public places like around fountains and city parks, and then of course in any place expecting physical damage. Never had a "grade to 8 ft" rule enforced, could be a local thing as we dont see severe cold weather. Im am curius what other situations anybody else has run into where it had to be sch 80, this would be good to know so not to get caught with my pants down by an inspector.
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Old 01-16-2012, 05:16 PM   #12
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As a side note...both HD's I have used in the past no longer carry sch 80 sticks.....everything else lb's,t's rb's ect...no sticks...wtf
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Old 01-16-2012, 05:20 PM   #13
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Quote:
Originally Posted by zoltan View Post
Informational Note: PVC Conduit, Type Schedule 80, is
identified for areas of physical damage.

what is the definition of "area of physical damage"?

If a weed eater is gonna hit it. (like the op's post)
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Old 01-16-2012, 05:38 PM   #14
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Quote:
Originally Posted by mcclary's electrical

If a weed eater is gonna hit it. (like the op's post)
Basically that means anytime it emerges from grade...that is not enforced out here, but thats not to say that im right either, just that this has not been my experience.

Where else is sch 80 needed (other than prints or spec's), that may be a everyday situation that you might run up on?
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Old 01-16-2012, 05:41 PM   #15
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Quote:
Originally Posted by MHElectric View Post
Basically that means anytime it emerges from grade...


That's exactly how they enforce it here. Anytime it emerges from grade
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Old 01-17-2012, 01:18 AM   #16
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"Where else is sch 80 needed (other than prints or spec's), that may be a everyday situation that you might run up on?"

Not sure if it's an NEC thing ( Might be Washington Admin Code or a PP&L thing) because this rule is so ingrained that I haven't looked it up in years...

You need Schedule 80 on unfused conductors when they enter a building (say - between the meter base and a panel in the basement).

Last edited by kbatku; 01-17-2012 at 01:25 AM.
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Old 01-17-2012, 01:20 PM   #17
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Quote:
Originally Posted by kbatku
You need Schedule 80 on unfused conductors when they enter a building (say - between the meter base and a panel in the basement).
Not that I know of.
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Old 01-17-2012, 02:38 PM   #18
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Quote:
Originally Posted by mcclary's electrical

That's exactly how they enforce it here. Anytime it emerges from grade
Does your area require schedule 80 or rigid buried under a driveway, or is that up to the AHJ?
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Old 01-17-2012, 04:15 PM   #19
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All of the PoCos in my area require you to supply sched 80 PVC for their UG conductors to the bottom of the meterbase.

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