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Trade Logic Systems
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Conduit Fill
Method (NEC Ch. 9) —
2023 & 2026
NEC 2023
NEC 2026
1. Conduit (Raceway)
Type
EMT
PVC Sch 40
PVC Sch 80
Rigid (RMC)
Trade Size
1"
2"
3"
4"
1/2"
3/4"
1 1/4"
1 1/2"
2 1/2"
3 1/2"
2. Conductors
Insulation
THHN / THWN
XHHW
Size
14 AWG
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
3 AWG
2 AWG
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
250 kcmil
300 kcmil
350 kcmil
400 kcmil
500 kcmil
600 kcmil
750 kcmil
1000 kcmil
Total Wires in Pipe
−
Qty
+
🔘
Conduit Fill
Add wires to calculate raceway capacity.