标题: UL153 Clause 8.4 unobstructed tubing length? 什么意思 [打印本页] 作者: syyhiw 时间: 2012-1-25 02:34 标题: UL153 Clause 8.4 unobstructed tubing length? 什么意思 The rotation during assembly is limited to not more than one revolution for each 3 inches (76
mm) of unobstructed tubing length through which the wires pass, when such rotation does not
place any stress on the conductors;