SiddMartin
Senior Member
- Location
- PA
...or at least as nice as a fella can make PVC look.SiddMartin said:and last but not least, some nice work..
Was that an ag building? Just wondering what sort of structure would have so much PVC indoors.SiddMartin said:I can't take the credit for that job, but i helped and it was a lot of PVC.
Looks good. Interesting install. Why PVC? (steel prices?)mdshunk said:...or at least as nice as a fella can make PVC look.![]()
chris kennedy said:Looks good. Interesting install. Why PVC? (steel prices?)
Note they bent thier own 90's.
Did you have to use spacers anyhow? I know that when I run PVC in slaughterhouses and walk-in coolers in restaurants, the health inspector (or maybe USDA inspector) wants the PVC spaced off the wall so that bacteria can't collect there.SiddMartin said:factory 90's, and job req. PVC, it is a Winery and subject to wash down
mdshunk said:Did you have to use spacers anyhow? I know that when I run PVC in slaughterhouses and walk-in coolers in restaurants, the health inspector (or maybe USDA inspector) wants the PVC spaced off the wall so that bacteria can't collect there.
Sorry, I see that now.SiddMartin said:factory 90's
mdshunk said:Did you have to use spacers anyhow? I know that when I run PVC in slaughterhouses and walk-in coolers in restaurants, the health inspector (or maybe USDA inspector) wants the PVC spaced off the wall so that bacteria can't collect there.
mdshunk said:Did you have to use spacers anyhow? I know that when I run PVC in slaughterhouses and walk-in coolers in restaurants, the health inspector (or maybe USDA inspector) wants the PVC spaced off the wall so that bacteria can't collect there.
378.22 said:378.22 Number of Conductors.
The sum of cross-sectional areas of all contained conductors at any cross section of the nonmetallic wireway shall not exceed 20 percent of the interior cross-sectional area of the nonmetallic wireway.
The derating factors specified in 310.15(B)(2)(a) shall be applicable to the current-carrying conductors up to and including the 20 percent fill specified above.
RUWired said:That looks like a nonmetallic wire way. If so, it looks like there could be a major derating factor problem in there. If i read it right, all conductors in a nonmetallic wire way have to follow 310.15(B)(2).
Correct me if i'm wrong.
RUWired said:That looks like a nonmetallic wire way. If so, it looks like there could be a major derating factor problem in there. If i read it right, all conductors in a nonmetallic wire way have to follow 310.15(B)(2).
Correct me if i'm wrong.
Cow said:Nonmetallic wireway is gutter. Read 378.2.
not sure what you mean by this. I'm refering to the wireway, not the conduit.cow said:Article 352 covers rigid nonmetallic conduit.
SiddMartin said:you may be right, i have not checked that. Each conduit only as 8 current carrying conductors. What does 310.15 (B)(2) say? It is #12 thhn if I remember correctly
SiddMartin said:factory 90's, and job req. PVC, it is a Winery and subject to wash down
RUWired said:If there are 8 ccc in each conduit and it looks like 25 conduits, there are 200 c.c.c. The wire fill is only 2.66. your allowed 20% of a 6x6. (7.2). according to the article, you would have to derate you conductors at 35 % (over 41). That would require using # 8 awg for each conductor. Providing your load wasnt over 19.25 amps.
Rick
The derating factors in 310.15(B)(2)(a) shall be applied only where the number of current-carrying conductors, including neutral conductors classified as current-carrying under the provisions of 310.15(B)(4), exceeds 30.