392.20(D) clarification

ADub

Senior Member
Location
Midwest
Occupation
Electrician
Could anyone help me to understand what is being described in this article? Specifically the size 1/0-4/0 restrictions regarding a single layer. Does this not apply towards grouped circuits and feeders? Thanks in advance
 

ActionDave

Moderator
Staff member
Location
Durango, CO, 10 h 20 min without traffic from wing
Occupation
wire pulling grunt
Well there's a lot of stuff that gets written into the code that has no basis in any real world problems.

What is it that made you ask about this code section? In my whole state there's only about four places where cable tray is a thing and none of those get inspected.
 

ADub

Senior Member
Location
Midwest
Occupation
Electrician
I
Well there's a lot of stuff that gets written into the code that has no basis in any real world problems.

What is it that made you ask about this code section? In my whole state there's only about four places where cable tray is a thing and none of those get inspected.
I guess I’m just confused on the specificity of the 1/0-4/0 restrictions on grouping single conductors and was looking for maybe a little clarity on the article. Is it permissible to group conductors of that size in other than a si glue layer if it is part of a branch circuit or feeder group?
 

ADub

Senior Member
Location
Midwest
Occupation
Electrician
I

I guess I’m just confused on the specificity of the 1/0-4/0 restrictions on grouping single conductors and was looking for maybe a little clarity on the article. Is it permissible to group conductors of that size in other than a si glue layer if it is part of a branch circuit or feeder group?
*Single layer*
 
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