Synopsis: A step-by-step guide to selecting, sizing, locating, and installing the main components—the meter base, main breaker, and breaker panel—of a new residential electrical system, including a discussion of how to size and install the various types of cable used in the. Synopsis: A step-by-step guide to selecting, sizing, locating, and installing the main components—the meter base, main breaker, and breaker panel—of a new residential electrical system, including a discussion of how to size and install the various types of cable used in the. Always begin with disconnecting the main supply before accessing any enclosure containing distribution components. This prevents arc faults and ensures safety when modifying or inspecting current paths. Inside the service housing, line conductors from the utility feed typically enter through the. 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 guide is designed to demystify the complex web of connections found inside your. Step-by-step guide to installing an electric meter box. Learn safety tips, wiring steps, troubleshooting, and when to call a pro. It helps the utility company give you the right bill.