Advanced WiringCâu 58 / 110
In a Class I, Division 1 location, a sealing fitting must be installed within what distance of an enclosure containing arcing devices?
a.24 in
b.18 in
c.12 in
d.36 in
Giải thích
Seals are required within 18 in of enclosures that contain devices which may produce arcs, sparks, or high temperatures.
Trích dẫn luật: 2023 NEC 501.15(A)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A location where ignitable concentrations of flammable gases or vapors exist under normal operating conditions is classified as:
- A location made hazardous by combustible dust is classified as which class?
- What is the minimum number of receptacles required at a general care (Category 2) patient bed location?
- What is the minimum number of receptacles required at a critical care (Category 1) patient bed location?
- The equipotential bonding grid around a permanently installed pool must use a solid copper conductor no smaller than:
- A required convenience receptacle for a dwelling pool must be located not less than what distance from the inside pool wall?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Master Electrician Licensing Exam (NEC-based) · Quy trình kiểm tra