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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:9 A: O: ^5 n% B( i$ D4 o; v
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 36.2 I( t- X7 H: R5 f% k3 w
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:
, A1 X& a6 K9 ea) A separable bracket for mounting that does not contain wiring and does not require tools for3 l; Y' u. x. b$ d
attachment to the luminaire; or0 }; o# ] q8 Q
b) Ring hanger, keyhole slots, or notches in the luminaire that permit removal from the
# M$ k, I. v. F* o) Umounting hardware without the use of tool. |
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