首页 > 线缆原材料
[问题求助] UL CM等级护套料标准
P:2008-11-28 22:10:17
3
按照UL444第四版的标准,条款7.8.2所述,UL CM等级60C的护套应该在 100 ±2°C老化7天后,只要拉伸达到未老化前的50%,扩张达到未老化前的75%,就是合格的,而不是依据UL1581来判定。
7.8.2 For cables to be rated 60°C, jacket material removed from a length of finished cable shall meet the
aging test as follows. After 7 d, at 100 ±2°C, there shall be at least 50% retention of the unaged elongation
and 75% retention of unaged tensile strength when six specimens are tested in accordance with the test
procedures in CSA C22.2 No. 2556 or UL 2556, with the following modifications:
SIC - specific inductive capacity电容率,介电常数 (0) 投诉
3
你需要登录才能发表,点击登录。