What is a UL94 HB rating?
UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA)….UL 94 Classification and Flame-Retardant Thermoplastics.
| UL 94 Rating | Definition of Rating |
|---|---|
| HB | Slow burning on a horizontal part |
What is UL 94v2?
UL 94 V-1 Vertical Burn; Burning stops within 60 seconds, NO flaming drips are allowed. UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed. UL 94 H-B Horizontal Burn; Slow horizontal burn test (H-B) are considered “self-extinguishing”. The lowest (least flame retardant) UL94 rating.
What is UL 746C?
The UL 746C regulation sets standards for polymeric materials used in electrical equipment, required by UL50. These requirements cover parts made of polymeric materials that are used in electrical equipment and describe the various test procedures and their use in the testing of such parts and equipment.
Is UL94 HB self extinguishing?
UL 94 H-B Horizontal Burn; Slow horizontal burn test (H-B) are considered “self-extinguishing”. This is the lowest (least flame retardant) UL94 rating.
What is UL 5VA?
5VA: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole.
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 is ul508?
UL 508, the Standard for Safety For Industrial Control Equipment, covers industrial control and related devices rated 1500 volts or. less used for starting, stopping, regulating, controlling, or. protecting electric motors. This equipment is for use in accordance.