By grounding the system, it helps prevent electrical shock hazards and ensures that stray electrical currents are safely directed to the earth. It acts as a centralized location where all ground wires from branch circuits are securely connected. It provides a neat and organized way to terminate multiple ground conductors, making the panel easier to inspect and maintain. This is a Ground Lug kit compatible for both QO and Homeline Load Center. It has 24 number of circuits which accepts 23-(1) 14 4 or (2) 14 or 12AWG copper or (1) 12 4 or (2) 12 or 10AWG aluminum and 1-(1) 1-4/0AWG..