2.5" lb wire size equivalent

[dhsvcs]

I have a run of 2.5" schedule 80 pvc where I need to utilize a pvc l.b.
I found a 2.5" lb that is rated for 3 350 mcm wire fill..
The largest wire that my run will use is 2 - 250 mcm wires plus some smaller wires.
The combination of all my wires at 40 % fill is 1.530 inches.
The fill of 3 350 mcm wires is 1.5498 inches.
Will this work ?
note....wires have already been upsized to allow for 80% fill...
Thanx...dhsvcs

 

[infinity]

What code cycle are you under. I believe that the 2020 allowed for a fill that is equivalent to the sum of the conductors printed on the conduit body not 40%.

 

[Tulsa Electrician]

Was the 80% a typo?

 

[dhsvcs]

The 80% that I was referring to was my response to up-sizing my wire size to account for having 6 conductors (4 ccc) plus a ground.
As a result, my feeders were larger than my original intention. If you look at my attachments, you will see that I have highlighted the
conductors in that run and I created a spreadsheet years ago that allows me to do a quick wire fill of multiple wire sizes that automatically
adds the wire sizes up and allows me check assorted conduit sizes on one sheet. And yes, the conduit dimensions are shown at 40% fill....

If your interested, look at the sections of the spread sheet that I cropped. I can upload a copy of the full spreadsheet if you want. I have
been using this spreadsheet, along with it's assorted notes, for years...

I call it my "one spread sheet does it all" solution for wire fill and conduit size....

 

[dhsvcs]

The last 2 attachments show the results of the 3 - 350 mcm wire size of the 2.5" l.b. that I used...It was/is a specter l.b, but the specs did not
show if the 350 mcm wire was thw, thwn, or Xhhw.. a couple of other lb's state xhhw as the wire used to compare the diameter of....

 

[don_resqcapt19]

The last 2 attachments show the results of the 3 - 350 mcm wire size of the 2.5" l.b. that I used...It was/is a specter l.b, but the specs did not
show if the 350 mcm wire was thw, thwn, or Xhhw.. a couple of other lb's state xhhw as the wire used to compare the diameter of....

The informational note that follows 314.38(A)(3) says:

Informational Note:
Unless otherwise specified, the applicable product standards evaluate the fill markings covered here based on conductors with Type XHHW insulation.

So you would always use the volume of XHHW conductors unless the conduit body marking shows a different type of conductor.
The calculation method part of the rule was added to the code in the 2017 cycle.

 

[infinity]

The calculation method part of the rule was added to the code in the 2017 cycle.

Well I was close.

I believe that the 2020 allowed for a fill that is equivalent to the sum of the conductors printed on the conduit body not 40%.