ConduitCount

How many 600 kcmil THHN/THWN-2 fit in conduit

600 kcmil THHN/THWN-2 is about 1.051 in across and 0.8676 sq in with its insulation (Chapter 9, Table 5). This is the most of it each conduit may hold, all the same size.

Trade sizeEMTIMCRigidPVC Sch 40PVC Sch 80FlexLiquidtightENT
1-1/4"01000000
1-1/2"11111111
2"11111111
2-1/2"2111111
3"4333333
3-1/2"5544444
4"7665556
5"998
6"131312

Empty cells: that type isn't made in that size.

Other sizes of THHN/THWN-2

The same size in other insulation