In addition to 480's Friday Pics

[RUWired]

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

That would be right for metal wire ways, Nonmetallic and aux gutters covers all conductors.


"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."

It also covers all conductors .
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.

 

[iwire]

That would be right for metal wire ways,

In the picture above that appears to me to be a metal wireway.

 

[RUWired]

Thats why i said correct me if i'm wrong. Sidd didn't dissagree with me so i assumed that it was a non metallic piece.

 

[iwire]

Thats why i said correct me if i'm wrong. Sidd didn't dissagree with me so i assumed that it was a non metallic piece.

I got you, I wish he had confirmed one way or another.

 

[RUWired]

Bob, would you agree with the article, that it pertains to all at any cross section? Must have something to do with pvc not cancelling effects.

 

[wwhitney]

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.

Personally, I read the second sentence above as applying only at each cross-section, since the first sentence of 378.22 refers to "all contained conductors at any cross section".

Cheers, Wayne

 

[weressl]

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

Wash down with NEMA 1 panels?

What am I missing?

 

[RUWired]

Personally, I read the second sentence above as applying only at each cross-section, since the first sentence of 378.22 refers to "all contained conductors at any cross section".

Cheers, Wayne

I would agree with you and Bob if they all came in straight down. Each cross section could be broken down. But in the pictures, they look to crossing over each way to the stubs down into the panels.