Pipe fill calculations

[Dustin M Morris]

When counting the wires for pipe fill in conduit to determine percentage of pipe fill as well as possibility of wire jamming.. do you count only the current carrying conductors or do you count the ground wire as well?

 

[LarryFine]

All conductors contribute to conduit fill, which is about physical space, not conductor ampacity.

 

[infinity]

When counting the wires for pipe fill in conduit

Pipe fill is just that. If it fills the pipe it counts.

 

[Dustin M Morris]

That was how I understood it also. Just needed to verify it to settle a disagreement with a couple of co-workers who wanted to debate it. Thank you for your reply and helping me with this!

 

[Dustin M Morris]

That was how I understood it also. Just needed to verify it to settle a disagreement with a couple of co-workers who wanted to debate it. Thank you for your reply and helping me with this

All conductors contribute to conduit fill, which is about physical space, not conductor ampacity.

Thank you!

 

[infinity]

Just needed to verify it to settle a disagreement with a couple of co-workers who wanted to debate it.

This is a common electrical myth.

 

[Dennis Alwon]

As stated it is often mistaken. I think the problem is that people get confused by de-rating which does not include equipment grounding conductor just current carrying conductor's. For pipe fill you are talking about how much space the conductors are taking up inside the conduit.