Thiết bị & Hệ thốngCâu 330 / 521
The DC PV disconnect label must display what information?
a.Only the manufacturer name
b.Nothing is required
c.AC frequency of the system
d.Maximum PV system voltage and maximum circuit current of the DC circuit
Giải thích
Section 690.53 requires the DC photovoltaic system disconnect to be marked with the rated maximum voltage and the maximum circuit current for the DC circuits, among other values. This information helps responders and service personnel understand the DC hazard; manufacturer name or AC frequency alone would not satisfy the labeling requirement.
Trích dẫn luật: 2023 NEC §690.53Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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