Plastic Flamability Related Discussion

UL94 is a test, not a specification. Underwriters Laboratories is a testing organization. They do not establish how much protection you need. They only tell you if your product meets their test standard.

It's up the the designer to establish flammability requirements.

My application probably might work OK even if its H-B rated. But I dont know why the previous engineer has used a V-0 material. Its very expensive, to make it cheaper, I could use H-B insted.

Anyways, on the other hand, do you have any material explaining what conditions demand use of V-0, V-1 or H-B?

No, it depends too much on what industry it is and what the product is. One size doesn't fit all.

Every industry has its own requirements. Something in orbit won't burn, because there's no air. But, electronics overheat in orbit, because there's no air. What are you building?

http://www.ides.com/property_descriptions/IEC60695-11-10.asp

I am building a optically clear, sealing cover over a high power LED board in a street light application. There could be max of 200 deg c temp involved. Exposed to sun in out doors. I can provide any other info if needed. This fixture would need to be UL listed. I don't know if this would really need a V-0 rated material to be used. Thanks c1

As someone who deals with a municipality every day, I'd say you need the V-0 rating.

Not necessarily because another rating would not work, but because chances are whoever is buying the lights doesn't have sufficient knowledge to make an informed decision.

Live with it.