|
Posted by PipeDown on June 19, 2006, 6:39 pm
> pbs wrote:
>>
>> gfretw...@aol.com 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
>> >
>> >
>> > Table C10 says 25 #12 THHN will fit is 1" sch 40 PVC rigid nonmetalic
>> > conduit
>>
>> Thanks. I had also intended to ask if the PVC conduit is permitted for
>> interior residential applications (this would run up through a chase)
>
> That would likely be a local code issue, it's not something in the NEC.
> I doubt you'd have an issue since PVC DWV stacks do the same thing with
> the same materials.
>
> Pete C.
I found that PVC ENT systems have far fewer choices when it comes to J-boxes
and those J-boxes tended to have a different standard for hole position so
that you had to use the more expensive covers.
Metal may be a bit more work cutting the tubing and connecting ground
pigtails at each J box but you will have lots more options at the ends of
the tubing to put those fixtures on. Transitioning to cable (romex) is
easier too using a simple clamp to hold the cable.
What money you may save using PVC conduit you will loose buying more
expensive plastic J boxes, elbows and tees.
On the other hand, you can drill a 3/4" hole in the side of a plastic J box
and thread a 1/2" male adapter to create more options (3 and 4 way J-boxes
for example). Don't know if that is to code but I don't really see a reason
for it not to be as long as you observe other rules about fill and glue all
connections.
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap