In addition to 480's Friday Pics

[SiddMartin]

..completly under water


and last but not least, some nice work..

 

[chris kennedy]

What are the last 2 pics? Your install?

 

[mdshunk]

and last but not least, some nice work..

...or at least as nice as a fella can make PVC look.

 

[SiddMartin]

I can't take the credit for that job, but i helped and it was a lot of PVC.

 

[mdshunk]

I can't take the credit for that job, but i helped and it was a lot of PVC.

Was that an ag building? Just wondering what sort of structure would have so much PVC indoors.

 

[chris kennedy]

...or at least as nice as a fella can make PVC look.

Looks good. Interesting install. Why PVC? (steel prices?)

Note they bent thier own 90's.

 

[SiddMartin]

Looks good. Interesting install. Why PVC? (steel prices?)

Note they bent thier own 90's.

factory 90's, and job req. PVC, it is a Winery and subject to wash down

 

[mdshunk]

factory 90's, and job req. PVC, it is a Winery and subject to wash down

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.

 

[stickboy1375]

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.

Thats pretty gross.

 

[chris kennedy]

factory 90's

Sorry, I see that now.

 

[SiddMartin]

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.

thats a new one for me, and inspector did not question it, so no, we did not space it.

 

[kpepin]

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.

We do the same thing in commercial kitchens. I've had to remove enough conduit stuck to the wall with built up grease!

 

[RUWired]

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).

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.

Correct me if i'm wrong.

 

[SiddMartin]

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.

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]

edit : only 8 CCC, it is still compliant with 310.15

 

[Cow]

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.

Nonmetallic wireway is gutter. Read 378.2.

Article 352 covers rigid nonmetallic conduit.

 

[RUWired]

Nonmetallic wireway is gutter. Read 378.2.

Auxillary gutters and non metallic wireways both have to follow derating factors of 310.15(B)(2). If it was a metal wire way, you would be allowed up to 30 c.c.c.'s

Article 352 covers rigid nonmetallic conduit.

not sure what you mean by this. I'm refering to the wireway, not the conduit.

 

[RUWired]

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

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

 

[dcspector]

factory 90's, and job req. PVC, it is a Winery and subject to wash down

So I assume "all" equipment is listed , labeled, identified for wet location?

 

[iwire]

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

But if many of the conductors simply pass vertically from the top raceways to the bottom raceways that will not be an issue.

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.