BR-UL-PMSPolymeric Materials Testing Instrument Series
Implementation of standards: UL 1703-2008
A polymeric material system serving as the enclosure of a part involving a risk of fire or electric shock shall comply with the applicable requirements in the standard for polymeric materials – use in electrical equipment evaluations, UL 746C,
concerning:
- Flammability
- Ultraviolet light exposure
- Water exposure and immersion
- Hot-wire ignition (HWI)
A polymeric material system serving as the support or insulation of a part involving a risk of fire or electric shock shall:
a) Have a flammability classification of HB, V-2, V-1, or V-0 determined in accordance with the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94;
b) Have a minimum high-current arc ignition performance level category (PLC) in accordance with the following:
Flammability classification | High-current arc ignition, PLC |
HB | 1 |
V-2 | 2 |
V-1 | 2 |
V-2 | 3 |
c) Have a Comparative Tracking Index performance level category (PLC) of 2 or better, when the system voltage rating is 600V or less, as determined in accordance with the Standard for Polymeric Materials – Short Term Property Evaluations, UL 746A; Right Figure: Arc generator |
d) Have an Inclined Plane Tracking (ASTM D2303) rating of 1h using the time to track method at 2.5 kilovolts when the system voltage rating is in the range 601~1000V.