a bus bar assembly includes a first main conductor , a second main conductor , and an insulator member provided between the main conductors . the insulator member includes : an insulator component , a first conductor layer provided on the top surface of the insulator component , and a second conductor layer provided on the bottom surface of the insulator component , wherein the first conductor layer includes an outer edge around a perimeter thereof , wherein the outer edge is located at least a certain distance from the outer edge around the perimeter of the insulator component , wherein the second conductor layer includes an outer edge around a perimeter thereof , wherein the outer edge is located at least the same certain distance from the outer edge of the insulator component , and wherein the certain distance is sufficient to cause the bus bar assembly to satisfy the creepage requirement of the assembly .