DESIGN REQUIREMENTS5.1GeneralAll cables herein specified shall be new and unused, recently manufactured, and free from all defects and imperfections that would affect their performance.The minimum requirements for the design, fabrication and tests of electric cables, shall be in accordance with hereby indicated and with standards IEC 61892-4, IEC 60092-350, -353, -354, -376, IEC 60332-3-22 and when required, according to IEC 60331. The cablesspecified shall be a product regularly manufactured by the CONTRACTOR.Cables shall be manufactured in one continuous length up to the maximum permissible cable drum length. Splices in conductors, insulation or sheaths are not acceptable.Cables installed in or crossing hazardous areas shall additionally comply with requirements of IEC 61892-7.