what is lot center main panel
For a single family house, many times the load center is the main panel, with the main breaker acting as the Service disconnect. In this panel, the green screw is used to bond (fasten) the neutral to the metal box. This is only done in the main panel. Any panels installed downstream of the main panel are called sub-panels, and the neutral in these panels must not bonded to the box. Since many Load Centers can be used as either the main panel, or as a sub-panel, we include the green screw with the load center to be used in the appropriate installation. NOTE: The green screw is also commonly called the Neutral Bonding Screw, or the Bonding Screw.