Patent ID: 8143523

Claim:
An electric cable for a submersible pump assembly comprising: an electrical cable adapted to be connected to a motor of the submersible pump assembly for supplying electrical power to the motor, the electrical cable having: three conductors for conducting electricity along a length of the cable to the motor to power the motor; a separate layer of polymeric electrical insulation surrounding each of the three conductors, defining three separate insulated conductors adjacent to each other the electrical insulation being selected from a list of polymeric materials consisting of EPDM rubber, nitrile rubber, HNBR rubber, Aflas rubber, FKM rubber, polypropylene (PP), polyethylene (PE), and cross-lined PE or PP; a layer of polymeric protective material surrounding the three insulated conductors; the layer of polymeric electrical insulation containing a filler material of particles having a higher thermal conductivity than polymeric material within the layer of polymeric electrical insulation for assisting in transferring heat away from the conductors; the filler material being selected from a group consisting essentially of ceramic additives such as silicon oxide, aluminum oxide, zirconium oxide, silicon nitride, silicon carbide, aluminum nitride, boron carbide, boron nitride and yitrium oxide; and wherein the layer of polymeric electrical insulation is electrically nonconductive.