Tools › Conduit Fill
Conduit Fill Calculator NEC Ch.9 Table 4 & 5
Calculate conduit fill percentage per NEC Chapter 9 Table 1.
NEC Fill Limits:
1 wire: 53% | 2 wires: 31% | 3+ wires: 40%
1 wire: 53% | 2 wires: 31% | 3+ wires: 40%
By clicking Apply, you acknowledge that results are for reference only and must be verified by a qualified electrician against the current National Electrical Code and local amendments.
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Conduit Fill
| Conductor | Area (in²) | Qty | Total (in²) |
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Remaining Capacity
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For reference only. Verify all results with the current NEC and local amendments. See Terms of Use.