| Rating |
Test Criteria |
| UL.94.V-0 |
The test samples are extinguished within 5 seconds average time
None of the test samples burned longer than 10 seconds
No test samples emit burning particles |
| UL.94.V-1 |
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests).
None of the test samples burned longer than 30 seconds
No test samples emit burning particles |
| UL.94.V-2 |
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests).
None of the test samples burned longer than 30 seconds
The test samples emit burning particles during the test |
| UL.94.HB |
In all of the above the tests, the samples are extinguished. So, if the sample keeps burning beyond 25 seconds, a horizontal test can be carried out to reach classification 94.HB
Horizontal test uses samples of a defined thickness which must not burn faster than prescribed by UL. |
