A grounding terminal and neutral bar are typically connected at which part of the electrical system?

The grounding terminal and neutral bar are typically connected at the main panel. This connection is essential because the main service panel is the primary point where the electrical system connects to the utility supply and where the grounding and bonding of the system is performed.

In the main panel, the neutral conductor, which carries the return current, is bonded to the grounding system to ensure both safety and proper operation of the electrical system. This configuration helps to prevent potential voltage differences between the neutral and ground, minimizing the risk of electric shock or fire.

Other locations, like sub panels, have specific code requirements that demand separation of the neutral and ground conductors to avoid potential issues with ground faults and electrical noise. The meter base typically doesn't serve as the bonding point for the neutral and ground, and while the service entry is critical in the overall installation, it is at the main panel where these two components are connected to meet code as well as safety standards.