|
5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or
# F" ^, J1 f9 ~* a4 R' z! Zportable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of
5 t) N! j, h' ]" B9 G' G8 O jthe device base with relation to the remainder of the device. Examples include:
) V3 X6 E# |$ \6 y" z1 c* ^a) A rectangular-shaped device in which the device is to be parallel with existing walls when
3 K# P) h3 q l, l) F+ }2 y% einstalled in a ceiling surface luminaire, and/ {( B0 `( p3 j) I4 l6 H* y; W
b) A device incorporating a ballast compartment or lamp support arms that will in some cases- ?& Z5 s! ]9 r4 l! P n+ l
have to be rotated more than 20 degrees to properly clear harps in portable luminaires.\
8 M% S$ Y7 m6 W; \8 v 同志们 请帮忙解释下上面这段话!
& r' a0 ?/ w3 } |
|