This guide provides a detailed walkthrough of the installation process, emphasizing safety and adherence to standard electrical practices. Steel is strong and durable, great for tough environments. Choose based on where you'll install the box. Using a purpose-built. An outdoor electrical distribution box serves as the critical junction point where incoming power lines are split into multiple branch circuits for outdoor installations, parking lots, building exteriors, and industrial facilities. This article details the process of installing them, which helps you comprehend distribution boxes. An outdoor electrical panel box, often called a subpanel, is a crucial component for distributing power to exterior locations like workshops, swimming pools, hot tubs, or landscape lighting.