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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:8 S4 }# D9 M5 T0 }% H9 f' g& Y( U
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 36.3 H, @' f) E9 j. n7 S7 g7 h2 a9 A
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:
! @* v+ H$ }8 |' D% Aa) A separable bracket for mounting that does not contain wiring and does not require tools for
/ m4 n0 @, b) d3 ~attachment to the luminaire; or) t2 }4 y, S0 M/ r( b
b) Ring hanger, keyhole slots, or notches in the luminaire that permit removal from the
4 R/ E- k# w3 @* fmounting hardware without the use of tool. |
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