Patent ID: 7788802

Claim:
A method for creating an electrical earth contact to electrically couple a contact shoe to an electrical contact stud using a polymeric material cap nut, the method comprising: creating an external thread on a shank of the stud; fixing a contact flange to the stud such that the contact flange faces the shank; selecting the cap nut from a non-conductive polymeric material and from a plurality of sizes of cap nuts; threading the cap nut onto the shank until the cap nut engages the contact flange; and applying to the cap nut a torque selected from a torque range operating to prevent pullout of the shank to electrically engage the contact shoe between the cap nut and the flange, wherein the plurality of sizes of cap nuts includes a 6 mm diameter; and wherein the torque comprises a range between 8 to 10 Nm inclusive applied to the cap nut for the 6 mm diameter.