This AutoCAD DWG file offers detailed electrical distribution board mounting plans, including both recessed and surface-mounted types. Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in. Here, you can see the wiring diagram of the 230V single-phase distribution box wiring diagram. Here, a double pole MCB is used as the Main MCB or Main switch. For any damage due to one of the following. Whether upgrading an aging electrical panel or setting up your facility, this guide will walk you through the critical steps to installing an MCB Distribution Box safely. We'll simplify technical jargon, highlight common pitfalls, and equip you with actionable insights—because your safety and.