True or False: Chapter 9, Table 1's 40% fill allowance applies to any raceway holding three or more conductors, regardless of conduit type (EMT, RMC, or PVC).
Not quite. The answer is B: True
The 40% cap for three-or-more conductors is a raceway-fill rule from Chapter 9, Table 1, and it applies uniformly across EMT, RMC, IMC, and PVC — the conduit material doesn't change the percentage, only its internal area (from Table 4) changes what that percentage translates to in square inches.
Reference: NEC 2023 Chapter 9, Table 1 (General Fill Percentages)
Checked against multiple published sources
Two independent secondary sources agree on the requirement; neither is the code text. One source is a 2016 article that names no edition; the other uses 2023 NEC values.
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