UL 60601-1 z中对于塑胶材料需要球击试验，为什么对于玻璃不需要考虑？

你是否指　UL 60601-2003  55DV.4.3?
有"对于玻璃不需要考虑"這種豁免嗎？

对，是55 DV 4.3
标准是针对塑料材料，问UL工程师是考虑意外冲击，但为什么 玻璃就可以不考虑这种冲击呢？

這個問題確實很有趣! 我也很想知道！

另有一個問題想請教，就是一個插頭式電源供應器，用於 Medical equipment, 所以要符合　UL 60601, 由於這個插頭是插在牆上，可否不考虑这种冲击呢？

插頭式電源供應器应该也是要考虑这种冲击的；我做过个手持式产品，当时UL工程师硬是让我在3个面都做了冲击试验 

Quote:

引用第3楼wongyatwah于2008-08-18 13:56发表的  :
這個問題確實很有趣! 我也很想知道！

另有一個問題想請教，就是一個插頭式電源供應器，用於 Medical equipment, 所以要符合　UL 60601, 由於這個插頭是插在牆上，可否不考虑这种冲击呢？

謝謝你分享經驗!

終於有找到類似的問題了.

其实我是想找到标准仅仅针对塑料的由来     

It comes from UL 746C



55DV.4.1 In addition to the other requirements in this Standard, flammability, mechanical
abuse and mold stress tests shall be conducted. Polymeric ENCLOSURES and covers shall
comply with the requirements for resistance to impact and drop as indicated below, and
the requirements for mold stress release distortion, in the Standard for Polymeric Materials
- Use in Electrical Equipment Evaluations, UL 746C.

In UL 746C, the standards says

58.3 Each of three samples of the appliance shall be subjected to a single impact of the value shown in
Table 58.1 for the applicable equipment type, on any surface that can be exposed to a blow during
intended use. This impact is to be produced by dropping a steel sphere, 50.8 mm (2 inches) in diameter,
and weighing 0.535 kg (1 .I8 Ib) mass from the height necessary to produce the specified impact as shown
in Figure 58.2. The steel sphere shall strike the surface in a location different from those in the other two
impacts. For surfaces other than the top on an enclosure, either the sample could be supported on the
side and subjected to the ball impact mentioned above, or the steel sphere is to be suspended by a cord
and swung as a pendulum, dropping through the vertical distance necessary to cause it to strike the
surface with the specified impact as shown in Figure 58.2. Three samples shall be employed for the tests
in the equipment restrained mode. However, if the manufacturer so elects, fewer samples may be used
in accordance with Figure 58.1. The overall performance is acceptable upon completion of any one of the
sequences represented in Figure 58.1.

谢谢分享和贡献

个人理解：
这一条考察的是材料的抗撞击能力，对于玻璃这种材料来说它本身就不具备这个能力，而且这个基本上是一个常识，所以一般可以认为如果选用玻璃这种材料本身不是为了抗撞击的，所以标准也不做要求。

经验认为：
除了9楼外,补充一点,就是玻璃不容易着火,也不容易熔化.即使温度上升,和电安全有关的也不会造成人身额外危险.而塑料特性大家都知道,用不着再叙说了.

是只针对塑料，因为我们产品外壳的金属部分在UL测试时都是不要求。

玻璃也有3C认证啊，为何对玻璃就不要求呢？

球压实验不是为了测试防火性能吗？我记得有次测试提供了个材料V-0等级的UL证书就不用测了。