Conduit fill charts

Pick the conduit. Each size has its own chart: the most wires of one size it may hold, for THHN, XHHW-2 and THW.

Electrical metallic tubing

1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"

Intermediate metal conduit

1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"

Rigid metal conduit (RMC, GRC)

1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"5"6"

Rigid PVC conduit, Schedule 40

1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"5"6"

Rigid PVC conduit, Schedule 80

1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"5"6"

Flexible metal conduit (FMC, Greenfield)

3/8"1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"

Liquidtight flexible metal conduit (LFMC)

3/8"1/2"3/4"1"1-1/4"1-1/2"2"2-1/2"3"3-1/2"4"

Electrical nonmetallic tubing (smurf tube)

1/2"3/4"1"1-1/4"1-1/2"2"