3 hour flame test for cables
3 hour flame test for cables
(OP)
Hello Everyone,
Does anybody know what sets the time requirement for the 3 hour flame test of certain standards?
For example a MIL-DTL-24643B requires this type of test.
I'm interested what where the reasons of the 3 hours, why not 5hrs or 2hrs or other?
Does anybody know what sets the time requirement for the 3 hour flame test of certain standards?
For example a MIL-DTL-24643B requires this type of test.
I'm interested what where the reasons of the 3 hours, why not 5hrs or 2hrs or other?






RE: 3 hour flame test for cables
http://www.kltannehill.com/Technical%20Documents/Cable%20Flame%20Test.htm
etc. for UL 910, UL 1581 and UL 1666 flammability tests, IEEE 383 vertical flame test, ...
RE: 3 hour flame test for cables
Thank you, but this confirms that there is no basis for the duration of the flame test.
The above link mentions tests for 75 seconds, 20 minutes, 30 minutes and again 20 minutes.
Nobody justifies the length of the flame duration. This is what I'm looking for.
In my opinion, although I can't seem to get the right justification in any standard, it should be related to the insulating material and the construction of the cable. Certain materials will burn slower, or take longer to melt. This is what I think is the basis for the duration of the flame test. I'm looking for some kind of guideline or standard that will tell me why a cable, using a particular insulating material, should pass a 3 hour or 1 hour, or 5 hour test.
Thank you but, I'm still looking for help.
RE: 3 hour flame test for cables