RDSO Approved Elastomer Cables are kinds of cables that have been certified by the Research Designs and Standards Organization for the use in Indian railways. These types of cables are designed for bearing the harsh environmental conditions as well as mechanical stresses encountered in railway usages. They are made with the use of a core copper metal conductor, and are surrounded by layers of rubber insulation and a protective outer jacket of elastomer materials like ethylene propylene diene monomer or chloroprene rubber. Regular inspection and maintenance are needed by RDSO Approved Elastomer Cables need to ensure safety and long life.