2023年1月12日 · VW-1 or UL 1581 is a vertical flammability test that determines the flammability of cable insulation. The test is called a Vertical Wire 1 test because, in the process of it, the cable is sustained vertically, and the source of fire is placed at one end of the cable while the piece of paper is attached to the other end.

Below is an overview of the most widely used North American fire test, which is called VW-1 (UL 1581). The test is also called the Vertical Wire (VW) test because it tests the materials ability to resist fire along a vertically suspended wire.

XHHW-2 - 600/1kV Copper, VW-1, CT-Rated | Single copper conductor, stranded and insulated with moisture, heat and flame resistant, chemically crosslinked polyethylene. VW1 Rated. ServicePro-X® Insulation - No Pulling Lubricant (#6 AWG and larger). Available in colors.

VW-1 flame testing is short for Vertical Wire-Class 1 flame testing. The VW-1 test was designed and is conducted by UL (Underwriters Laboratories). Its purpose is to screen out electrical cable and wire that prove themselves to be flammable under testing conditions.

Vertical-Wire Flame Test. UL 1581 VW-1 This was the first flame test developed for studying how flames spread on wire and cable. The test is performed with a 24′ wire and a Tirrill burner. Two clamps hold the single sample vertically.

90°C Wet or Dry, 600 Volts. Flexible Stranded Tinned Copper Conductor. XLPE Insulation. For use in internal wiring of electrical equipment, control panels, switchboards, and appliances or for use as motor leads. For use as permitted in NEC Article 310.

VW-1 Durablend 200 - This VW-1 wire outperforms braided silicone products with smaller diameter, lighter weight, tighter bend radius, superior flexibility, no braid fraying or skin irritation, and more. Read more about this VW-1 cable from Radix.

Radix provides high temperature wire, high performance cable at the thinnest possible diameter without sacrificing its performance.

The VW-1 rating, also known as UL 1581, serves as a benchmark to assess the vertical flammability of cable insulation. This test gauges the cable's resistance to igniting when flames are applied in an upright position.

The purpose of the UL VW-1 Vertical Wire Flame Test is to screen out flammable wires. The ignition source is small (under 1 kW) and is applied for only 75 seconds. In the UL VW-1 Flame Test, a tirrill burner (similar to a Bunsen burner) is used as the ignition source.