Wiring Methods & MaterialsQuestion 63 of 120
A short raceway nipple no longer than 24 inches connects two enclosures. What fill percentage is permitted?
a.31 percent
b.40 percent
c.53 percent
d.60 percent
Explanation
Notes to Chapter 9, Table 1 permit a nipple not exceeding 24 inches in length to be filled to 60 percent of its total cross-sectional area, because heat buildup and pulling friction are both minimal over such a short run. The 40, 53 and 31 percent values are the normal fills for three or more, one, and two conductors respectively.
Law Reference: 2023 NEC Chapter 9, Table 1, Note 4Practice all 120 questions free — no signup required.
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