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. 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. Learn how to install a distribution box safely and correctly. Covers wiring, placement, standards, and expert tips for a compliant setup. Understanding how to properly wire a main breaker box is essential for ensuring the safety and functionality of your electrical system. In this comprehensive guide, we will walk you through the process of wiring a main breaker box step by step. Its function is to safely divide the incoming high-amperage utility power into smaller, manageable branch circuits that supply power to lights, outlets, and. An Electrical Service Panel or a Circuit Breaker Panel is an important part of every residential electrical system. Breaker Panels may have different.