Patent ID: 6339189
Filing Date: 2002-01-15
Classification: H01B,Y10T

Abstract:
A fire-retardant electrical cable having long term insulation resistance comprising a metal conductor and at least a double layer polymer coating disposed to surround the metal conductor, said at least a double layer coating defining an inner and an outer layer, wherein:said inner layer comprises a polymer matrix, a predetermined first amount of flame retardant inorganic filler and a predetermined amount of coupling agent; and said outer layer comprises a polymer matrix, a predetermined second amount of a flame retardant inorganic filler; said predetermined first amount of inorganic filler in the inner layer being lower than said predetermined second amount of inorganic filler in the outer layer, and said predetermined amount of coupling agent having properties wherein the long term insulation resistance of the cable is kept substantially constant when the cable is placed in water.