Arc Resistance - ASTM D495
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The number of seconds that a material resists the formation of a surface conducting path when subjected to an intermittently occurring arc of high voltage, low current characteristics. The results at 3 mm thickness are considered representative of the material's performance in any thickness.
Performance Level Categories (PLC) were introduced by UL to avoid excessive implied precision and bias.
| Mean Time of Arc Resistance (sec) |
PLC |
| 420 and longer |
0 |
| 360 through 419 |
1 |
| 300 through 359 |
2 |
| 240 through 299 |
3 |
| 180 through 239 |
4 |
| 120 through 179 |
5 |
| 60 through 119 |
6 |
| <60 |
7 |
|
