The Square D By Schneider Electric Ground Bar Kit is an important accessory in your home or business electrical load center. This 4 Terminal Ground Bar Kit is used in load centers, CSED devices and NQOD and NF panel boards. Each terminal accepts (1) #14 - #4 copper wire or (1) #12 - #4 aluminum wire, (2) #14 - #12 copper wire or (2) #12 - #10 aluminum wire.