Dual insulated direct burial cable has an inner layer of chemically resistant fluoropolymer (Kynar or Halar). This provides additional chemical resistance in highly chlorinated environments. If salts are present, these salts can result in the formation of chlorine gas which reacts with water to create hydrochloric acid. This can be very damaging to standard cabling. We highly recommend the added chemical protection of dual insulated cables in areas where high current densities occur in a chloride rich environment with minimal gas or electrolyte mobility. Deep anode ground beds, salt laden soils, and marshy areas can all create problems for standard cable. These applications call for a more chemically inert cable insulation.