Lập kế hoạch & Dự toánCâu 359 / 521
The combined general lighting, small-appliance, and laundry load of a dwelling is 9,000 VA. After applying the standard-method demand factors, what is the net load?
a.9,000 VA
b.3,150 VA
c.4,200 VA
d.5,100 VA
Giải thích
The first 3,000 VA is taken at 100% and the remaining 6,000 VA at 35%: 3,000 + (6,000 × 0.35) = 3,000 + 2,100 = 5,100 VA. Applying 35% to the whole amount or forgetting the first block gives the wrong distractor values.
Trích dẫn luật: 2023 NEC §220.42Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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