The distribution box should be kept at a minimum safe distance from flammable materials, water sources, and heat sources (such as furnaces), and follow the separation requirements for different voltage systems in local safety regulations. Is distance satisfactory to protect power distribution boxes (breaker boxes, disconnects ranging from anywhere from 50 volts to 440 volts) from damage in active warehouses with stacked material, fork truck traffic, and pedestrian traffic; or does there need to be a protective barrier? If distance. Switch box shall be distributed by the final sub-distribution box. The power distribution box and switch box must be rainproof and dustproof. 7 meters) high makes it easily accessible without the need to bend or stretch excessively.