Conduit fill?

[electricblue]

So I got an inspector that fail me for something I didn't even do. It's been there for decades. He failed it for pipe being to small (1 1/2 EMT )! 2 3/0's 1 2/0 and #6. I do the conduit fill calc and it fine. .8088 40% fill. Anything I'm missing before I cus him out?:rant:

 

[dkidd]

Assuming THWN, I get 39.7%

 

[Dennis Alwon]

So I got an inspector that fail me for something I didn't even do. It's been there for decades. He failed it for pipe being to small (1 1/2 EMT )! 2 3/0's 1 2/0 and #6. I do the conduit fill calc and it fine. .8088 40% fill. Anything I'm missing before I cus him out?:rant:

What is the insulation type?

 

[ggunn]

Assuming THWN, I get 39.7%

So does this online calculator: http://conduitfillcalculator.com/

 

[electricblue]

Then

 

[electricblue]

Thwn

 

[ActionDave]

Thwn

Any chance the inspector is just looking at the pipe and saying it's to full?

 

[Dennis Alwon]

Yep-- with thwn you are clear-- area at 40% of 1 1/2" EMT = .814 and the calculated area of the conductors is .8088. Sounds good to me but cuss him out nicely....

 

[Carultch]

So I got an inspector that fail me for something I didn't even do. It's been there for decades. He failed it for pipe being to small (1 1/2 EMT )! 2 3/0's 1 2/0 and #6. I do the conduit fill calc and it fine. .8088 40% fill. Anything I'm missing before I cus him out?:rant:

Produce details of your calculation and show that it is correct. It could be that the inspector is just looking at it, and it appears to be overfilled. It is hard to know visually whether it is correct or not, when it is this close to call.

Sometimes you might have variation in how this is calculated, because manufactured dimensions may differ from the values in the NEC.