The vw 1 flame test also known as the vertical wire flame test evaluates a wire cable s ability to resist fire while vertically suspended.
Vw 1 cable standard.
Ul listed for ct use 1 0 and larger.
The vw 1 rating written on a cable specifies the flammability of the outer jacket.
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Two clamps hold the.
To pass the vw 1 test the wire must not burn longer than 60 seconds.
Yet another version of ul1581 the only difference is that the btu value is 210 000 instead of 70 000 and the cable spacing increases.
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Below is an overview of the most widely used north american fire test which is called vw 1 ul 1581.
Ul 1581 vw 1 this was the first flame test developed for studying how flames spread on wire and cable.
The test is also called the vertical wire vw test because it tests the materials ability to resist fire along a vertically suspended wire.
It is conducted by using a single cable specimen portioned in a vertical position in a three sided metal enclosure that has a layer of untreated surgical cotton on the bottom.
Vw 1 ul1581 standard for vertical flame test this is a small scale test of the flammability of insulating materials.
This cable complies with the vw 1 flame test requirements in ansi ul 1581.
All sizes carry the vw 1 flame test designation.
Ul vw 1 is the american standard for cables and wires also known as ul 1581 and determines flame retardancy.
Cables pass ieee 1202 csa ft4 70 000 btu hr cable tray flame test 1 0 and larger.
Ul listed as sunlight resistant 1 0 awg and larger black only.
Conforms to icea s 95 658 nema wc70 utilizing column a insulation thicknesses.
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The flame is applied for 15 seconds and repeated 4 more cycles after each time when the wire stops burning for a total of 5 cycles.
The test is performed with a 24 wire and a tirrill burner.
Awm appliance wiring material this type of wire is defined by ul 758 and is meant to be used with consumer products in basic connectivity applications such as connecting a computer to a monitor or routing a usb cable from a motherboard to the outside of the computer.
Ul vw 1 vertical flame testing.