Planning & EstimatingQuestion 369 of 521
The optional calculation method of 220.82 may be used for a dwelling served by a single 120/240 V feeder or service rated at least how many amperes?
a.60 A
b.100 A
c.200 A
d.400 A
Explanation
The optional method applies where the dwelling is served by a single 3-wire 120/240 V (or 3-phase, 4-wire) service or feeder rated 100 A or greater. Smaller values do not meet the threshold and 200 A/400 A are not the minimum.
Law Reference: 2023 NEC §220.82(A)Practice all 521 questions free — no signup required.
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