conduit fill capacity

[gayler]

Am I correct that with 1/2 in EMT I can have nine 12ga wires? I will only have six unless I use the conduit for ground.

 

[alfredeneuman]

Yes

 

[gayler]

Yes

Thanks! That just seems like an awful lot.

 

[klassenl]

Am I correct that with 1/2 in EMT I can have nine 12ga wires? I will only have six unless I use the conduit for ground.

What part of North America are you located. This is the latest edition od.my code book

 

[gayler]

What part of North America are you located. This is the latest edition od.my code book

This is the chart I looked at https://solutions.borderstates.com/resource/conduit-fill-table/ I’m in Kansas.

 

[dscheidt]

What part of North America are you located. This is the latest edition od.my code book

That table is shifted a size from US practice. Either things are very different in Canada, or there's a misprint.

 

[alfredeneuman]

That table is shifted a size from US practice.

That was the Code in 1968 and earlier editions.
The tables changed drastically in 1971.
http://conduitfillcalculator.com/conduit-fill-chart/

EDIT: It was when THHN wire came into general use, instead of TW and THW.

 

[klassenl]

I see one difference at least. My table is RW and others liked to are T90. That would account for the significant difference.

 

[yatg]

If you want to pull an EGC, you only need one #12. Split it off wherever.

 

[gayler]

If you want to pull an EGC, you only need one #12. Split it off wherever.

Yes I am going to pull an EGC. I thought about just using my conduit as the ground. But I would much prefer to have a separate ground wire also.

 

[west_tex]

Southland wire has a pretty cool app that will let you input your wires and tracks the % full and likely hood of a jam.