View Single Post
  #10   Report Post  
Posted to alt.home.repair
-------------@-------------
 
Posts: n/a
Default PVC Conduit Fill Rating?

On Wed, 21 Jun 2006 04:04:51 GMT, "Thomas D. Horne, FF EMT"
wrote:

wrote:
On Tue, 20 Jun 2006 04:38:08 GMT, "Tom Horne, Electrician"
wrote:

pbs wrote:
Hi:
Can #12 THHN be run through 1' gray PVC Electrical conduit?

If Yes, what is the code fill rate for 1" PVC? ( I believe that 1" EMT
can handle 18 #12 THHN maximum.)

Thanks

Actually One inch Electro Metallic Tubing has a table fill of 26 Number
12 American Wire Gage (AWG) conductors. Schedule 40 PVC is allowed 25
conductors. The question then becomes why. With more than 20
conductors in the raceway the ampacity of #12 THHN is 13.5 amperes. so
#12 could not be used for even a fifteen ampere circuit. You're allowed
fifteen #10 AWG wires in 1" PVC and at an allowable ampacity of twenty
amperes for 10 to 20 conductors you could use them for twenty ampere
circuits.



So then it would make more sense to run 20 #20 wires, and run ONE amp
thru each wire (with a one amp breaker on each wire). You'd still end
up with 20amps at the end of the run.

Pila


Please don't feed the troll people. That will just encourage it.


The "Troll People" ? Is that a new band like the Village People?