Core TradesCâu 17 / 700
What is the MINIMUM headroom (vertical clearance) required for the working space about a service panel or other electrical equipment rated 600 volts or less?
a.6 feet 6 inches
b.5 feet 0 inches
c.7 feet 6 inches
d.4 feet 6 inches
Giải thích
The code requires at least 6 feet 6 inches of headroom in the working space so a worker can stand and access equipment safely. 5 feet and 4 feet 6 inches are too low, and 7 feet 6 inches overstates the requirement.
Trích dẫn luật: 2025 CA Electrical Code (CEC) §110.26 (Working Space)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Final troweling or hard floating of a concrete slab should NOT begin until:
- For general-use receptacles along a dwelling wall, the spacing rule requires that no point measured horizontally along the wall line be more than what distance from a receptacle?
- Along a kitchen countertop, receptacle outlets must be placed so that no point along the counter wall line is more than what distance from a receptacle?
- A feeder must supply a continuous load of 32 amperes plus a noncontinuous load of 40 amperes. What is the MINIMUM feeder conductor ampacity required?
- When 7 current-carrying conductors are bundled together in a single raceway, their allowable ampacity must be adjusted to what percent of the base value?
- In a dwelling, 125-volt receptacles must have GFCI protection when installed within what distance of the outside edge of a kitchen or wet-bar sink?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB General Building (B) Trade Examination · Quy trình kiểm tra