As the new type of underwater electric cable system used for deep submergence research vehicles and deep sea equipments, pressure compensated, oil-filled cable system is being developed. In contrast with the usual underwater cable system which requires hard adhesion between connector's shell and cable sheath by molding rubber, the oil-filled cable system is anticipated to solute any probrem caused by water leakage through deteriorated adhesion surface, because no chemical adhesives is required. It is expected too as the other merit that the operation effeciecy of wiring work under construction and repairs will improve, for it is easy to separate and connect individual hardwares of oil-filled cable system. On this development, oil-filled cable and connectors were manufactured for trial and tested successfully, therefore fair prospect of oil-filled cable system operated at 6,000m depth has been confirmed. From now, the durability of oil-filled cable and connectors will be tested finaly and underwater wiring junction box will be manufactured and tested through continual development. In this paper, the contents of enforced development of oil-filled cable and connectors is reported.
