Thiết bị & Hệ thốngCâu 303 / 521
Thermal insulation must be kept at least how far from a non-Type IC recessed luminaire enclosure?
a.1/2 inch
b.1 inch
c.3 inches
d.6 inches
Giải thích
Section 410.116(B) requires thermal insulation to be kept at least 3 inches from the enclosure of a non-Type IC recessed luminaire so heat is not trapped. Only a luminaire identified as Type IC may be in direct contact with insulation; the smaller clearances apply to combustible material spacing, not insulation.
Trích dẫn luật: 2023 NEC §410.116Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which of the following is NOT required to be marked on a motor nameplate by NEC 430.7?
- For a permanently installed swimming pool, what conductor is required for the equipotential bonding grid?
- A non-Type IC recessed luminaire must be spaced at least how far from combustible material, except at the points of support?
- An emergency system must make power available to the required loads within what maximum time after normal power is lost?
- A legally required standby system must restore power to its loads within what maximum time after normal supply is lost?
- How is the maximum current of a PV source circuit determined for conductor and overcurrent sizing?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-10 Electrical Trade Examination · Quy trình kiểm tra