BS EN 50265-2-1电缆单根垂直火焰燃烧测试

BS EN 50265-2-1:1999 Common test methods for cables under fire conditions-test for resistance to vertical flame propagation for single insulated conductor or cable-Part 2-1: Procedures-1KW pre-mixed flame 在燃烧情况下电缆和绝缘导线性能的一般测试方法-单根电缆的垂直火焰蔓延测试,第2-1部分:程度-1kw混合火焰.

This British Standard is the English language version of EN 50265-2-1:1999. When used in conjunction with BS EN 50265-1, it supersedes BS 4066-1:1980 which is withdrawn.

The standard is similar with DIN EN 60332-1-2, GB/T18380.12

Sample

The test sample shall be a piece of single insulated conductor or cable (600± 25)mm long.

The flame shall be applied continuously for the period of time corresponding to the diameter shown in Table 1

Evaluation of test results

The single insulated conductor or cable shall pass the test if the distance between the lower edge of the top support and the onset of charring is greater than 50 mm.

In addition, a failure shall be recorded if charring extends downwards to a point greater than 540 mm from the lower edge of the top support.

If a failure is record, two more tests shall be carried out ,if both tests result in passes, the single insulated conductor or cable shall be deemed to have passed the test.

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