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这种墙壁安装式的portable 灯具,最重要的是接线盒(底盘)的地方要封起来,安装时不能碰到内部电线,安装时不用工具就可以安装到墙壁。就是说,可以在墙壁先用工具固定一个支架,然后把灯具底盘挂上去,或者用手旋动的螺母固定上去,总之灯具安装在支架上不可以用工具。如果用工具才可以拆装,灯具就要接地,用三芯线才行,以下是条款:0 Y% K& [9 M- F) A
68.3.3 A wall mounted unit that has accessible metal parts shall be provided with a grounding attachment plug and comply with the requirements in Grounding and Bonding, Section 36.
5 I3 r( l+ E2 A# O. ]Exception: Units are not required to be provided with a grounding attachment plug or comply with the requirements of Section 36 if they cannot be readily adapted for permanent mounting by:7 l: t1 l' R5 l/ Z; H
a) A separable bracket for mounting that does not contain wiring and does not require tools for
6 i5 I- w" [/ N8 j8 V' Hattachment to the luminaire; or: W; o$ u' x, b: d5 w
b) Ring hanger, keyhole slots, or notches in the luminaire that permit removal from the" c; { A+ W3 k% C+ P' W/ f. d- _# m
mounting hardware without the use of tool. |
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