UL Plenum Cable Flame Test samples must be provided on a reel or spool. L = length of sample in feet; D = diameter of cable in inches Plenum Cable Flame Test: L = 900/D (Example: For a 0.50 inch diameter cable 900/0.50 = 1800.00 feet)
For Flat cables use the following equation to determine the diameter:
<DIV align=center>OD = 1.128 [(T)(W)]?/FONT>
where, T= Length of Minor Axis in inches W= Length of Major Axis in inches </DIV>