Lập kế hoạch & Dự toánCâu 375 / 521
A dwelling has 9,000 VA of electric heating and 6,000 VA of air conditioning that cannot operate at the same time. What value is included in the service calculation?
a.15,000 VA
b.3,000 VA
c.7,500 VA
d.9,000 VA
Giải thích
For noncoincident loads that cannot run simultaneously, only the larger load is included, which is the 9,000 VA of heating. Adding both (15,000 VA) or averaging them ignores the noncoincident rule.
Trích dẫn luật: 2023 NEC §220.60Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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