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Arc Resistance - ASTM D495 Plastic Test Standard

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Arc Resistance - ASTM D495

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

Property information for specific grades of resin are available in the Prospector Plastics Database.