|
For 5-inch test(UL) for the enclosure material,one experience:2 K% H/ W1 @+ e" a
1. If 5VA is used with the minimum thickness requirement, normally this test can be ingnore.# [8 O, q! L9 |3 f3 d/ S
2. If not 5VA(but still UL recognized), it does not mean, 5-inch test needs to be done, at this time you must see the components inside the enclosure, such as PWB, cause the flammability test mainly consider if the fire can be spread to outside of the enclosure, so if the PCB have enough flammability, the 5-inch test for the enclosure material also can be exempt... |
|