A high-voltage electrical cable assembly includes a central wire strand containing at least seven wires formed of a first alloy and a plurality of outer wire strands twisted around the central strand. At least one outer wire strand of the plurality of outer wire strands contains at least seven wires formed of a second alloy different from the first alloy. There is an electrochemical potential of about 2 volts between the first alloy and the second alloy. A method of assembling a high-voltage electrical cable assembly is also presented herein.