API RP 17Z PDF
This recommended practice is applicable to the design, fabrication, testing, installation, and operation of subsea power systems. The scope includes single phase and three phase systems from 3 kVac to 69 kVac. It covers subsea installed electrical power equipment and the connections between the equipment.
This RP does not include DC power systems, though they may be included in future revisions.
For any conflicting requirements between this standard and specific component standards listed in Section 2 of this specification with regards to analysis, design test and qualification, the requirements of the specific component standard shall apply.