Theory & SafetyCâu 117 / 120
What is the minimum width of working space in front of electrical equipment?
a.30 inches in all cases regardless of equipment width
b.30 inches, or the width of the equipment, whichever is greater
c.36 inches, or the width of the equipment, whichever is greater
d.24 inches, measured from the centerline of the equipment
Giải thích
The working space must be at least 30 inches wide or as wide as the equipment, whichever is greater, and it must allow all doors and hinged panels to open at least 90 degrees. The space need not be directly centered on the equipment, but it must be continuous across the full width required.
Trích dẫn luật: 2023 NEC §110.26(A)(2)Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A single-phase transformer has a 480-volt primary and a 120-volt secondary. If the secondary carries 100 amperes, what is the approximate primary current?
- What is the secondary full-load current of a 25 kVA single-phase transformer with a 240-volt secondary?
- A 480-volt panelboard is mounted on a wall with a grounded concrete wall directly behind the working space. What is the minimum depth of working space?
- Entrances at each end of the working space are generally required for equipment rated at least what value and over 6 feet wide?
- The dedicated equipment space above a panelboard extends from the top of the equipment to what height?
- Which sequence correctly describes verifying that equipment is de-energized before beginning work?
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