Install a grounding electrode conductor (GEC) from the grounding terminal to an 8-foot copper ground rod driven into the soil. If local code requires, add a second rod 6 feet apart. The meter box, also known as the meter socket or service entrance equipment, is the point where the utility's power lines connect to the premises wiring system. Electrical grounding intentionally. An electric meter box wiring diagram is a visual representation of the electrical connections and circuits involved in connecting an electric meter to the rest of the electrical system in a building. This prevents arc faults and ensures safety when modifying or inspecting current paths.