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High Voltage Arc Resistance to Ignition (HVAR) - UL 746
The number of seconds that a material resists ignition when subjected to a high voltage low current arcing source.
Performance Level Categories (PLC) were introduced to avoid excessive implied precision and bias.
Mean Time to Ignition (sec) | PLC |
---|---|
300 and longer | 0 |
120 through 299 | 1 |
30 through 119 | 2 |
<30 | 3 |