Minimum temperature for arc rated clothing

[LND_TS]

Does anyone know what is the minimum temperature for arc rated clothing?

[Kalbi_Rob]

Does anyone know what is the minimum temperature for arc rated clothing?

I'm gonna take a guess that it's 500 degrees F, but here's an excerpt from the following link:
https://ohsonline.com/Articles/2020/...ds.aspx?Page=2

Material like untreated cotton has a very low ignition temperature of approximately 480 degrees Fahrenheit (250 degrees Celsius) and burns intensely and rapidly. Untreated polyesters and nylons ignite easily at temperatures of 480 to 660 degrees Fahrenheit (250 to 350 degrees Celsius) and melt readily. Cotton/poly blends combine the worst qualities of both fabrics in terms of ignition and melting. Remembering that an arc flash can reach temperatures of over 35,000 degrees Fahrenheit (19,000 degrees Celsius), you can see how quickly and easily these various materials will ignite.

ASTM D7138 (thread melting resistance): thread used in garments must be of flame-resistant fiber and not melt at 500 degrees Fahrenheit.

ASTM F2894 (heat resistance): When exposed to 500 degrees Fahrenheit for five minutes, garment fabrics must not ignite, melt, drip or separate and not shrink more than 10 percent.

[Izeldeen]

I'm gonna take a guess that it's 500 degrees F, but here's an excerpt from the following link:
https://ohsonline.com/Articles/2020/...ds.aspx?Page=2

250C,480F