This is a small scale test of the flammability of insulating materials. 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.
A sample that has passed this test may be listed as CL2X or CL3X, suitable for using in limited and power cables.
Test outline
The sample is kept vertical and burned with a laboratory burner 5 times for 15 seconds.
Safety regulations applied
UL subject 758, UL 1581 (UL VW-1)
CSA C22.2 No. 0.3 (CSA FT1) - (no surgical cotton)
Japan Electrical Appliance & Material Control Law
(DENTORI-Law) : Attached list #8 (-F mark)
IEC32-1 (Burning time is different from data below)
Test process
(1) The sample attached to an indicator is fixed in a vertical position (see diagram right).
(2) The laboratory burner is set at a 20 angle, & its flame is applied directly for 15 seconds & then taken away for 15 seconds. This process is repeated 5 times.
Judging standards
1. The remaining flame burns out after 60 seconds.
2. The indicator does not suffer fire damage of 25% or
3. The surgical cotton under the sample is not burned by falling insulation. (except FT 1) |
