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-   -   Rigid Nonmetallic PVC Conduit Schedule 40 question? (http://www.diychatroom.com/f18/rigid-nonmetallic-pvc-conduit-schedule-40-question-19430/)

luweee 04-02-2008 08:18 PM

Rigid Nonmetallic PVC Conduit Schedule 40 question?
 
How many 12-2 cables can I put in a 2" pipe?

Thanks

Let me tell you what Im doing actually. I finishing the basement. I have 12 circuits that Im running. Im trying to copy the existing setup coming out of my breaker box. I am running a pvc conduit (as stated in my TITLE question) elbowed out of my circuit panel and up about 4 feet to the joist directly above. This is where the PVC will stop just as the contractor did with the existing wiring. Then run the wires from there to there appropriate place.

chris75 04-02-2008 08:19 PM

Quote:

Originally Posted by luweee (Post 113368)
How many 12-2 cables can I put in a 2" pipe?

Thanks

legally or just how many?

Jim Port 04-02-2008 08:24 PM

If the conduit is outside = zero.

Why not use individual conductors?

luweee 04-02-2008 08:29 PM

Thanks Chris and Jim. Sorry... I edited my original question. Please read.

LEGALLY.

Thanks guys

220/221 04-02-2008 08:43 PM

Realisticly , 12 will fit easily.


Technically you could get turned down because the cable isn't secured to the panel.

You wouldn't get turned down in AZ for that installation.

Cow 04-02-2008 08:48 PM

Four 12-2's on a 20 amp breaker. Or ten 12-2's on a 15 amp breaker. My calcs show you aren't over the fill requirements either. Like 220 said, if you're finishing the basement this would be a code violation.

luweee 04-02-2008 08:49 PM

HMMMMMMMMMM

Thanks 220/221

question again then. How did the Contractor secure them OR DID HE?

BTW dont know if I explained but the conduit will be secured with a threaded nipple. All the pipe is for electrical.. in fact it is exactly the same as what the Contractor used when they built the house 4 years ago.

Thanks again 220.221

Jim Port 04-02-2008 09:32 PM

Seems to overly complicate your install. Why not just leave the panel and run the cables up to the joist bay?

If you are short on knockouts most connectors will accept 2 flat cables.

luweee 04-02-2008 09:44 PM

just thought it would "Look" Neater!.... I dont know.

Is there a code for whats exposed right atthe service panel?

jrclen 04-03-2008 11:15 AM

Quote:

Originally Posted by Jim Port (Post 113374)
If the conduit is outside = zero.

12-2 UF?

jrclen 04-03-2008 11:19 AM

Quote:

Originally Posted by Cow (Post 113386)
Four 12-2's on a 20 amp breaker. Or ten 12-2's on a 15 amp breaker.

HUH, could you explain this?

chris75 04-03-2008 03:51 PM

Quote:

Originally Posted by 220/221 (Post 113385)
Realisticly , 12 will fit easily.


Technically you could get turned down because the cable isn't secured to the panel.


Technically if he follows 312.5(C) he's good to go...

chris75 04-03-2008 04:05 PM

Quote:

Originally Posted by 220/221 (Post 113385)
Realisticly , 12 will fit easily.


Technically you could get turned down because the cable isn't secured to the panel.


Technically if he follows 312.5(C) he's good to go...


I did the math and I came up with 18 #12-2's, this of course is only good if your PVC is less than 24" in length, ( no derating required) and you MUST follow the rules of 312.5(C) to have cables enter a top of a cabinet with a raceway...

220/221 04-03-2008 04:21 PM

Quote:

question again then. How did the Contractor secure them OR DID HE?
No.....not necessary except for the pesky code. Inspectors here ALWAYS disregard the "secured to the enclosure" thing....ALWAYS.





Quote:

Technically if he follows 312.5(C) he's good to go...


Quote:

out of my circuit panel and up about 4 feet to the joist directly above.

It will look cleaner and the cables will be protected. That's how I would do it. Be sure to leave a couple inches of sheath showing in the panel for future troubleshooting purpose. It's nice to know which hots go with which neutrals.

Cow 04-03-2008 05:48 PM

Quote:

Originally Posted by jrclen (Post 113531)
HUH, could you explain this?

Yes, derating will stop him before he meets the fill requirements.


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