Theory & DesignCâu 95 / 110
What are the commonly recommended maximum voltage-drop limits for a branch circuit and for the combined feeder plus branch circuit?
a.5% and 8%
b.2% and 4%
c.3% and 5%
d.1% and 3%
Giải thích
The informational recommendation is 3% maximum on a branch circuit and 5% maximum for feeder plus branch circuit combined.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A single-line (one-line) diagram represents an electrical system by:
- A transformer steps 480 V down to 120 V. What is its turns (voltage) ratio?
- A transformer has a 4:1 turns ratio and a 10-A primary current. What is the secondary current (ideal)?
- An AC circuit at 240 V draws 12 A. What is the circuit impedance?
- A continuous load draws 40 A. At what minimum ampacity must the branch-circuit conductors and overcurrent device be rated?
- The demand factor of a system is defined as:
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