Flame retardant fillers are used in insulation and jacket coatings to produce building and industrial cables that meet critical fire safety standards and codes. These flame retardant additives mitigate the inherent fuel properties of the base resins used to provide electrical insulation to the underlying conductor, thereby slowing the spread of fire and providing critical escape time should a fire start. VW-1 (UL 44 and UL 2556) is an industry specification describing the flame retardancy of a polymer coated wire and its likelihood to propagate a fire after the removal of the initial heat source.
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