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条款:
2 |7 R+ s, U N) s' `5 N5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or. y4 l# y; Z: t; y q" z8 a! y
portable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of
+ ?- l* Y- Q8 C" v1 c% y/ T% f Hthe device base with relation to the remainder of the device. Examples include:/ U4 ~' s, c- r2 G1 a
a) A rectangular-shaped device in which the device is to be parallel with existing walls when
* i8 a9 {# U C' U, Binstalled in a ceiling surface luminaire, and
. p: T; S q6 E7 q. [b) A device incorporating a ballast compartment or lamp support arms that will in some cases* N h2 Y! D0 K! |( J
have to be rotated more than 20 degrees to properly clear harps in portable luminaires.
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3 v4 ^. o( T0 O, i4 y. K该怎么理解?? |
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