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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:
3 p( q$ ~5 o, g5 b& F ]# h68.3.3 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.' G' X* `& W3 d0 p$ J; E/ M
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:6 Z9 e- X7 S7 C) {
a) A separable bracket for mounting that does not contain wiring and does not require tools for
7 T8 N0 N ^' p6 |8 ^* u# L1 {: j- Lattachment to the luminaire; or
' b3 ^% S0 I. @% u9 ?3 S% X' r+ ^b) Ring hanger, keyhole slots, or notches in the luminaire that permit removal from the
f" K, l8 ]+ Q: F7 k+ Kmounting hardware without the use of tool. |
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