Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in dry, accessible areas with good ventilation and at appropriate height (typically ~1. Practice good wiring: secure grounding, neat cable management, proper insulation, and correct wire gauge and. In this guide, we'll break down everything you need to know to install a distribution box correctly and confidently. Site selection requirements: The distribution box should be installed in an area close to the power supply to reduce. The metal distribution box is designed for a wide range of low-voltage applications in residential buildings, commercial complexes, offi ces, and industrial facilities. 1 Pre-installation Requirements for Transformers and Substations: - The indoor ceiling and wall finishes should be completed with no water leakage.