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Conduit Sizing Calculator
Calculate minimum conduit size based on wire count and NEC fill requirements.
Number of Conductors
?
Total number of conductors in conduit.
Wire Area (each)
?
Cross-sectional area of each wire in sq inches (12AWG THHN=0.0133).
in²
Ground Wire Area
?
Area of equipment grounding conductor.
in²
Calculate
Results
Total Wire Area
-
in²
Min Conduit Area (40%)
-
in²
Suggested Trade Size
-
References:
NEC Chapter 9 Table 1; NEC Table C1; NEC 300.17