Distribution boxes contain many protective devices like circuit breakers, fuses, and isolator switches to distribute and regulate power from the main power supply to multiple circuits in other buildings, and to prevent damage and fire hazards, usually installed in electrical. Distribution boxes contain many protective devices like circuit breakers, fuses, and isolator switches to distribute and regulate power from the main power supply to multiple circuits in other buildings, and to prevent damage and fire hazards, usually installed in electrical. Learn how to install a distribution box safely and correctly. Covers wiring, placement, standards, and expert tips for a compliant setup. A well-chosen and properly installed distribution box can prevent electrical hazards, reduce downtime, and ensure your electrical system operates smoothly for years to come. Let's explore how these critical components work and why they deserve your attention. A distribution box, also known as a. A distribution box, also known as a fuse box or power distribution box, is the heart of the domestic electrical installation.