Is 5VA better than V-0?
V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed. 5VA: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole.
What is a UL 94 HB rating?
UL 94 Classification and Flame-Retardant Thermoplastics
| UL 94 Rating | Definition of Rating |
|---|---|
| HB | Slow burning on a horizontal part |
| V-2 | Burning stops within 30 seconds on a part allowing for drops of vertical flammable plastic. |
What are the different rating a per UL 94?
Types of testing/flammability ratings covered in the UL 94 standard for flammability of plastic materials include: Vertical burning tests (V-0, V-1, V-2, 5V, 5VA, 5VB, VTM-0, VTM-1, VTM-2)
What is flame rating?
UL-94 flammability ratings are testing standards developed by Underwriters Laboratories to measure the flammability characteristics of plastic. There are six UL 94 specified flame classifications that apply to plastic enclosures used to house electronics (5VA, 5VB, V-0, V-1, V-2, HB).
What is the best flammability rating?
UL 94-5VA
UL 94-5VA Surface Burn; Burning stops within 60 seconds, test specimens MAY NOT have a burn-through (no hole). This is the highest (most flame retardant) UL94 rating. UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed.
What is 5VA material?
A 5VA rating means burning stops inside 60 seconds on a vertical specimen without dripping (and without creating a hole in the specimen).
What is a UL yellow card?
A Yellow Card is issued when polymeric materials have successfully undergone our testing procedures and received a UL Recognized Component Mark. Our tests include: Ignition and burning characteristics from thermal and electrical sources. Electrical, physical and mechanical characteristics.
What does a flammability rating of 1 mean?
Level 1 – Materials that are normally stable, but become explosive at elevated temperatures and pressure. ◆ Level 0 – Materials that are stable even under exposure to fire. A chemical hazard rating at the highest level should be given to a room if chemicals are present in quantities of five (5) gallons or more.
What VTM 0?
Vertical Testing of Thin Materials (VTM‑0, VTM‑1, VTM‑2) This test is used for materials that are thin, or are too flexible or may distort, shrink or flex during ordinary vertical testing.
How do I get my UL yellow card?
Yellow Cards are listed in the UL iQTM database and UL’s Prospector® database, which are used by thousands of designers, engineers and suppliers to find providers of recognized materials and components.
What is a yellow card production?
Yellow Card Shows are, simply, shows that carry an all-IATSE crew and are a union tour. When a show does play a union venue, a representative of the Local is supposed to check the show personnel’s travel cards to ensure they are travelling under proper documentation.