The UL flame exposure is a vertical tray fire test for determining values of cable damage height and smoke release from electrical and optic fiber cables when the cables are subjected to a flaming ignition source. For a cable to be acceptable under the UL test procedure, each of the following is to be exhibited.
(a). The cable char height is to be less than 244 cm when measure from the bottom of the cable tray
(b). The total smoke released equal or less than 95 m2
(c). Peak smoke release rate equal or less than 0.25 m2/s
The purpose of this test is to determine the flame propagation and smoke characteristics of these cables for the limited smoke marking. This test does not investigate the toxicity of the products of combustion or decomposition.
- Cabin made of concrete masonry complying to ASTM C 90 with dimensional compliance to test standard.
- Ignition source (70,000 btu/hour)
- Cable tray, measuring scale and burner stand
- Collection hood and exhaust ducting
- Exhaust Blower
- Velocity measurement probe
- Low Pressure Transducer
- Thermocouple, K
- Smoke Measuring Equipment (Photometric system)
- Data Acquisition Software
