www.b3cable.com
CMP UL 910
This is a test for Flame-propagation and Smoke-Density Values for electrical and Optical-Fibre Cables
used in spaces transporting environmental air.
Lay the specimens into a 7.3m ± 51mm long ladder cable tray in straight, parallel rows to fill the width
of the tray (286 ± 3mm) without any space between adjacent specimens. The ignition burner flame is
fuelled with bottled methane gas of uniform quality and with the higher heating value of 8.9 ± 0.1
kilocalories/m3. The air velocity shall be obtained as 73.2 ± 1.5 m/min, Terminate the test 20minutes
after the start of the test by shutting off the methane gas supply.
The Maximum flame propagation distance shall not exceed 152mm beyond the initial 137cm ignition
burner flame, the peak optical density of the smoke produced shall not exceed 0.50. The average optical
density of the smoke produced shall not exceed 0.15.