EN 50266-2-4：著火條件下電纜通用測試方法－第2部分：垂直固定的電線束或電纜的垂直火焰擴(kuò)散測試.過程.類別C
EN 50266-2-4：Common Test Methods for Cables under Fire Conditions - Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or Cables Part 2-4: Procedures - Category C
Abstract摘要
EN 50266 specifies methods of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, electrical or optical, under defined conditions.
The test is intended for type approval testing. The requirements for the selection of cables for testing are given in annex A. The flame spread is measured as the extent of damage of the cable sample. This procedure may be used to demonstrate the cable’s ability to limit flame spread.
This Part 2-4 covers Category C and relates to cables installed on the test ladder to achieve a nominal total volume of non-metallic material of 1,5 litres per metre of test sample. The flame application time is 20 min. The method of mounting uses the front of the standard ladder. The category is intended for general use where low volumes of non-metallic material are required to be evaluated.
A recommended performance requirement is given in annex B.
