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如果是最不利的位置,应该很少有产品可以通过测试.
请参照UL153:
132.3 Test method – units with flexible or articulated arm
132.3.1 When the portable luminaire has a flexible or articulated arm, the arm is to be bent before the
lamp is placed on the inclined plane, starting at the lower end of the arm, to form a quarter circle that a
line joining the ends of the arm make an angle of 45 degrees with the horizontal. When a flexible or
articulated arm is off-center with respect to the base, the arm is to be bent in the direction that results in
tip over. When the unit has more than one flexible or articulated arm, one of the arms is to be adjusted
as for a unit having a single arm, and the other arm or arms are to be extended vertically.
Exception No. 1: When the unit is not stable on a flat horizontal surface in a particular position, the unit
is not required to be tested in that position.
Exception No. 2: Any position of intended use as specified in the manufacturer’s instructions is determined
to be the normal operating position.
就是说,如果是有关节的灯,就要将手臂调成四分之一的圆弧,或者说最后一条手臂与水平面成45度角. |
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