Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. The distribution box has the characteristics of small size, simple installation, special technical performance, fixed location, unique configuration function, not limited by the site, relatively common application, stable and reliable operation, high space utilization, less land occupation and. The distribution box has the characteristics of small size, simple installation, special technical performance, fixed location, unique configuration function, not limited by the site, relatively common application, stable and reliable operation, high space utilization, less land occupation and. Choosing how cables enter an explosion-proof distribution box is one of those decisions that looks straightforward on paper but gets complicated fast once you factor in the actual site conditions. Cable glands and conduit systems both do the job—sealing the enclosure, protecting the cable. The distribution box (DB box) helps safely and efficiently distribute electrical power. Many experts say you should follow these steps: Make clear goals for your project. Plan your design to be safe and work well.