Patent ID: 8382508

Claim:
An electrical power assembly for supplying power to a motor comprising: a motor lead having one end for connection to the motor and having a plurality of individual metal sheathed conductors; a power cable having one end for connection to a power source and having a plurality of individual metal sheathed conductors; and a splice connector for joining each of the conductors of the motor lead to one of the conductors of the power cable comprising: a tubular metal fastener body with a motor lead end and a power cable end and a tapered motor lead shoulder adjacent to the motor lead end and a tapered power cable shoulder adjacent to the power cable end and fastener body threads on the power cable end and on the motor lead end of the fastener body; a metal nut assembly fixed to one of the power cable conductors having threads that engage the fastener body threads on the power cable end, the metal nut assembly having a tapered shoulder in metal-to-metal sealing engagement with the power cable shoulder of the fastener body; a metal coupler fixed to one of the motor lead conductors and having threads that engage the fastener body threads on the motor lead end, the metal coupler having a tapered shoulder in metal-to-metal sealing engagement with the motor lead shoulder of the fastener body, thereby sealing an interior of the fastener body; and an electrical contact on the conductor of the power cable and the conductor of the motor lead, the electrical contacts mating with each other in the interior of the fastener body; and an elastomeric seal disposed between the nut assembly and the fastener body, the elastomeric seal comprising a plurality of expansion relief voids operable to collapse and relieve stresses exerted by the seal when the seal undergoes thermal expansion.