|
5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or
; C+ S+ z7 m. g; q) p4 S# c- `portable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of" P* R+ v0 m' G3 @% O
the device base with relation to the remainder of the device. Examples include:
2 f7 L& |" E6 G; Z6 ?7 n6 Aa) A rectangular-shaped device in which the device is to be parallel with existing walls when
( {2 k* j# x" zinstalled in a ceiling surface luminaire, and
' N- I) u( T8 T+ H6 d5 |b) A device incorporating a ballast compartment or lamp support arms that will in some cases
0 ~4 A4 R, g ^0 X; Fhave to be rotated more than 20 degrees to properly clear harps in portable luminaires.\
8 A: N; N) w5 v# i* @3 Z# ~ 同志们 请帮忙解释下上面这段话!
) b$ D$ K w- {* x |
|