This recommended practice establishes requirements for a three-conductor round-type oil-well cable used in supplying three-phase ac electric power to submersible pump motors. Cables meeting the requirements of the recommended practice shall be rated for voltages not exceeding 3 kV or 5 kV and for ambient temperatures not exceeding 257 F (125 C). Use of cable above rated temperature can cause premature deterioration of the insulation. Voltage ratings are nominal phase-to-phase ratings.