This part of IEC 60332 covers category A F/R for methods of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, under defined
conditions.
This document relates only to power cables of conductor cross-sectional area greater than
35 mm2 installed on the test ladder in a spaced configuration on the front and rear to achieve
a nominal total volume of non-metallic material of 7 l/m of test sample. The flame application
time is 40 min. This method of mounting is intended for special cable designs used in
particular installations when required in the cable specification. Category A F/R is not intended for general use.