Thiết bị & Hệ thốngCâu 328 / 521
For a one- or two-family dwelling, what is the maximum permitted PV system DC voltage?
a.1000 volts
b.300 volts
c.600 volts
d.1500 volts
Giải thích
Section 690.7 limits the maximum PV system DC voltage on or in one- and two-family dwellings to 600 volts. The higher 1000-volt and 1500-volt levels are used on larger commercial and utility installations, not on dwellings.
Trích dẫn luật: 2023 NEC §690.7Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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