This chapter discuss different types of HVDC cable on land and subsea. Different conductor materials, insulation systems and armouring used in construction of cables are described. You will also find advise on calculation of design values for cables. Information from manufacturers is combined with experience and technical papers. Costs found in different press releases are collected and also a typical cost split between engineering and testing manufacturing and installation. A wide scale of risk consideration, different types of surveys and investigations recommended prior to installation are discussed. Installation including cable loading, laying, pull-in, jointing and protection in sea are described with examples of vessels and equipment. Different methods of land cable installation are described. At last preparedness, the sequence of work and time for cable repair is covered.