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5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or @ ^7 H# W- B. ? x) h' `, g
portable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of' r# C& f1 N$ S9 T# _
the device base with relation to the remainder of the device. Examples include:
# O8 E. S. \( ]1 Y+ X, qa) A rectangular-shaped device in which the device is to be parallel with existing walls when# B2 R7 O: b, M% h0 _( R; f2 u
installed in a ceiling surface luminaire, and3 J' a3 a# P) U. l! A
b) A device incorporating a ballast compartment or lamp support arms that will in some cases
, l6 W) M2 y' }" t# @/ zhave to be rotated more than 20 degrees to properly clear harps in portable luminaires.\( ~/ J, w( O$ q% e$ g& ?- p
同志们 请帮忙解释下上面这段话!
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