风扇标准.doc

。除非:。
,有聚合机架的墙式或天花板嵌入式风扇或吊扇/灯组合应该标明不能用于点燃额定装置和只能用于一到两个家庭。
非金属零件(除了围栏) 通常装入那些装入绝缘或非绝缘带电部件的金属机架的或用于装饰部件的聚合材料,应该通过标准UL94中关于装置和器具中塑料材料零件可燃性测试的描述的燃烧测试来分成5VA, 5VB, V-0, V-1, V-2,或 HB类。
:当装饰的零件所占的空间不大于2立方厘米(),直径不大于3cm(),而且它的位置不会导致火花从一边传播到另一边,或不会在可能的点火源和点火零件之间建立桥接时,它不需要由5VA, 5VB, V-0, V-1, V-2, 或 HB 类的材料构成。
:当一种材料符合聚合材料标准中的12mm()火焰测试,19mm()火焰测试或127mm(5英寸)火焰测试时,则它就被决定为同等意义的。当火焰测试用于设备时,这个标准用于电器设备评估,UL746C。应用于聚合围栏内部的火焰延缓剂外套是不可接受的,除非外套/材料的界面经过单独的研究发现是可接受的。
(1英寸)之内。
:Exception No. 1: For all motor types except skeleton or open frame, an impeller is not prohibited from being within mm of an opening in the motor housing when:
a) The material is classed as V-2, V-1, V-0, or 5V in accordance with the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. The coil wrap that
complies with the 127 mm (5 inches) end product flame test as described in the Standard for Polymeric Materials – Use in Electric Equipment Evaluations, UL 746C, does not need to
possess a 5VA flame rating;
b) The plies with the requirements for enclosure flammability using a 19-mm (3/4- inch) flame, in accordance with the Standard for Polymeric Materials – Use in Elec