Conduit Fill Calculation Report
Generated on May 17, 2025
NEC Chapter 9 Compliance Analysis
Conduit Specifications
Conduit Type: EMT
Trade Size: 1-1/2"
Internal Area: 2.036 sq.in.
Installation Type: Raceway
Fill Type: Standard
Fill Analysis
Total Wire Area: 0.7623 sq.in.
Fill Percentage: 37.4%
Allowed Fill: 40%
Remaining Area: 0.0518 sq.in.
NEC Compliant: Yes
Wire Breakdown
| Wire Type | AWG Size | Count | Individual Area (sq.in.) | Total Area (sq.in.) | % of Total |
|---|---|---|---|---|---|
| THHN | 12 AWG | 15 | 0.0133 | 0.1995 | 26.17% |
| THHN | 10 AWG | 8 | 0.0211 | 0.1688 | 22.14% |
| THHN | 8 AWG | 4 | 0.0366 | 0.1464 | 19.21% |
| THHN | 6 AWG | 5 | 0.0507 | 0.2535 | 33.25% |
Recommendations
- • Fill percentage (37.4%) is close to the NEC limit (40%). Consider using a larger conduit for future expansion.
- • Multiple wire types detected. Ensure compatibility and temperature ratings.
- • Large number of conductors may require derating per NEC 310.15(C)(1).
NEC Requirements
• Fill calculations per NEC Chapter 9, Tables 4 and 5
• Maximum fill: 53% (1 conductor), 31% (2 conductors), 40% (3+ conductors)
• Nipples 24" or less allow 60% fill for 2 or more conductors
• Wire areas include insulation thickness per conductor type
• Conduit areas are internal cross-sectional areas
Report generated by Electric Tools Suite
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