What specification factors are important in a Halogen-free Wiring Duct?
Fire Safety
Specification factors in regard to fire safety with any non-metallic product cable trunking can include flammability, flame
spread, smoke toxicity and the optical density of smoke generated in the event of fire.
For most applications the primary cable duct specification factor for a non-metallic product, with regard to safety, is its
ability to sustain and spread fire, or its flammability. As a result, almost all non-metallic materials (halogenated
or not) are tested to determine their flame rating. A typical test method is UL94, which provides wiring duct a rating of the
material at the product thickness. The classifications of this test range from V-0, V-1, V-2 to HB based on their
performance characteristics
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. Engineers selecting products for use in electrical machine controls often specify
an acceptable rating for non-metallic components. Non-metallic products, including halogen-free wiring duct,
hat are V-0 rated are more optimal as they have the preferred rating under this test method.
