My question is the bonding screw between the ground bar and neutral bar always required in a new, stand alone entrance service panel? This is not a sub-panel, nor will I be installing a sub-panel.
I have installed a Square D, 200 amp, QO panel and need to know if I need to install the green bonding screw in the upper right corner between the ground bar and the neutral bar? The reason I ask is my HVAC contractor installed my 220v heating equipment and installed the ground wire to the neutral bar, and I believe the 220v system should not be attached to the neutral, but the ground, however; if I bond the ground and neutral bar together, isn't that the same thing?
What happens or could happen if the two are not bonded? Everything appears to be working correctly without the bonding screw.
Any help or explanation would be appreciated.
I have installed a Square D, 200 amp, QO panel and need to know if I need to install the green bonding screw in the upper right corner between the ground bar and the neutral bar? The reason I ask is my HVAC contractor installed my 220v heating equipment and installed the ground wire to the neutral bar, and I believe the 220v system should not be attached to the neutral, but the ground, however; if I bond the ground and neutral bar together, isn't that the same thing?
What happens or could happen if the two are not bonded? Everything appears to be working correctly without the bonding screw.
Any help or explanation would be appreciated.