scope:

EN 50399 specifies the apparatus and methods of test for the assessment of vertical flame
spread, heat release and smoke production of vertically-mounted bunched wires or cables,
electrical or optical, under defined conditions.
NOTE For the purpose of this standard the term "electric wire or cable" covers all insulated metallic conductor cables used for the conveyance of energy or signals.
EN 50399 details the apparatus and the arrangement and calibration of the instrumentation to be
installed in order to measure the heat release and the smoke production during the test. The
combustion gases are collected in a hood above the test chamber which allows the measurement
of heat release rate and smoke production. Test procedures to be used for type approval testing
for classification of cables in Euroclasses B1ca, B2 ca, C ca and D ca are given. Cable installation on
the test ladder and the volume of air passing through the chamber are in accordance with the Commission decision which is reflected in the requirements of this standard.
The apparatus described in this standard shall be used in conjunction with that described in
EN 50266-1.