The method described in the UL 94 standard involves standard size
specimens and are intended to be used solely to measure and describe the
flammability properties of materials, used in devices and appliances, in
response to heat and flame under controlled laboratory conditions. The
actual response to heat and flame of materials depends upon size and
form, and also on the end-use of the product using the material.
Assessment of other important characteristics in the end-use application
includes, but is not limited to, factors such as ease of ignition, burning
rate, flame spread, fuel contribution, intensity of burning, and products of
combustion.
The final acceptance of the material is dependent upon its use in complete
equipment that conforms with the standards applicable to such equipment.
The flammability classification required of a material is dependent upon
the equipment or device involved and the particular use of the material.