Learn how to install a distribution box safely and correctly. It takes the incoming power and safely distributes it to different circuits. Whether you are an electrical contractor or a construction brigade, knowing how to properly and safely install distribution boxes is the basis of ensuring the safe operation of the entire system. Covers wiring, placement, standards, and expert tips for a compliant setup. This manual is for electronic distribution only and is designed to provide you with the most current information on the Los Angeles Department of Water and Power's (Department) service equipment and installation requirements. The I F s currently PreConfigur to support the system layout as shown in Figure 1, page 1. The allowable size of a ch des the.