Japanese Standards Association

Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods-Glow-wire flammability index (GWFI) test method for materials
 N JIS C 60695-2-12

Annotation

This Standard specifies the details of the glow-wire test to be applied to test specimens of solid electrical insulating materials or other solid materials for flammability testing to determine the glow-wire flammability index (GWFI).

GWFI is the highest temperature, determined during this standardized procedure, at which the tested material

a) does not ignite or, if it does, extinguishes within 30 s after removal of the glowwire and is not totally consumed,

and

b) molten drips, if they occur, do not ignite the wrapping tissue.

This test method is a materials test carried out on a series of standard test specimens (see clause 4). The data obtained, along with data from the glow-wire ignition temperature (GWIT) test method for materials, JIS C 60695-2-13, can then be used in a preselection process in accordance with JIS C 60695-1-30 to judge the ability of materials to meet the requirements of JIS C 60695-2-11.

NOTE 1 As an outcome of conducting a fire hazard assessment, an appropriate series of preselection flammability (JIS C 60695-2-12) and ignition tests (JIS C 60695-2-13) may allow a reduction of end product testing (JIS C 60695-2-11).

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

lEC 60695-2-12: 2010 Fire hazard testing-Part 2-12: Glowing/hot-wire based test methods-Glow-wire flammability index (GWFI) test method for materials (IDT)