In electric power distribution the point of common coupling (PCC) is where a consumer's electrical circuit connects to the utility grid. It serves as a demarcation point, defining the boundary between the public utility network and the customer's private electrical installation. At the PCC the utility's responsibility for power delivery ends and the consumer's responsibility for their internal power quality begins. The PCC is typically located at the electrical meter, the service transformer secondary terminals, or the main service entrance. The conditions and characteristics of the electrical supply, such as voltage, frequency, and power quality, are measured and monitored at this point to ensure compliance with grid codes and regulatory standards.