Advanced Wiring第 58 / 110 题
In a Class I, Division 1 location, a sealing fitting must be installed within what distance of an enclosure containing arcing devices?
a.24 in
b.18 in
c.12 in
d.36 in
解析
Seals are required within 18 in of enclosures that contain devices which may produce arcs, sparks, or high temperatures.
法律依据: 2023 NEC 501.15(A)免费刷完整 110 道题库 — 无需注册。
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