Branch Circuits & WiringQuestion 143 of 521
For 1/2-inch through 1-inch trade size rigid PVC conduit, what is the maximum support spacing per Table 352.30?
a.5 ft
b.4 ft
c.6 ft
d.3 ft
Explanation
Table 352.30 requires support of rigid PVC conduit sized 1/2 in through 1 in at intervals not exceeding 3 ft because PVC is more flexible than metal raceway. Larger sizes allow wider spacing. 5, 4, and 6 ft all exceed the 3-ft maximum for these small sizes.
Law Reference: 2023 NEC §352.30(B)Practice all 521 questions free — no signup required.
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