Advanced Wiring第 73 / 110 题
A required branch circuit that supplies a sign or outline lighting system must be rated at least:
a.20 A
b.15 A
c.30 A
d.40 A
解析
Each commercial building must have at least one dedicated 20-A branch circuit for a sign or outline lighting outlet.
法律依据: 2023 NEC 600.5(B)免费刷完整 110 道题库 — 无需注册。
同考点相关题目
- Two 10-HP, 460-V motors (14 A each) are supplied by one feeder. What minimum feeder conductor ampacity is required?
- A motor without a marked service factor (or with SF under 1.15) has a full-load current of 28 A. What is the maximum overload protection at 115%?
- Which wiring method is acceptable in a Class I, Division 2 location?
- Low-voltage lighting systems covered by Article 411 are limited to a maximum circuit voltage of:
- Electrical equipment supplying a decorative fountain must have what protection?
- The equipotential plane bonding conductor in an agricultural building must be: