Code Admin & SafetyCâu 98 / 110
What is the minimum headroom (height) of working space about electrical equipment such as panelboards?
a.6 ft
b.6.5 ft
c.7 ft
d.8 ft
Giải thích
The minimum headroom of working space is 6.5 ft (or the height of the equipment, whichever is greater).
Trích dẫn luật: 2023 NEC 110.26(A)(3)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For equipment operating at 0-150 V to ground under Condition 1, what is the minimum depth of working space in front of the equipment?
- What is the minimum required width of working space in front of electrical equipment?
- The dedicated equipment space above a panelboard extends how far above the equipment (or to a structural ceiling if lower)?
- Equipment rated at what current or more requires two entrances to and egress from the working space when the space is large or contains overcurrent devices?
- For a circuit rated 100 A or less, conductor ampacity is generally based on which temperature column unless the equipment is listed otherwise?
- For circuits rated over 100 A, conductor ampacity for terminations is generally based on which temperature column?
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