Distribution box and switch box should not exceed 30 meters. The following table of Safe Distances from EMF Sources is offered below to help reduce your exposure to electromagnetic fields (EMFs). But the actual EMFs emitted from different sources can vary greatly, and the distances needed to reach a desired “safety level” are difficult to predict. Based on NFPA 70E and OSHA standards, it helps protect electrical workers by specifying limits by voltage level. For instance, OSHA's Table R-6 specifies minimum approach distances for various voltage. The International Standards of Practice for Inspecting Commercial Properties (ComSOP) states that the inspector should report on the lack of accessibility or working space for electrical panels and gear that would hamper their safe operation, maintenance, and inspection. Many jurisdictional and. 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. Electrical clearances set the minimum safe distances for panels, overhead lines, pools, and buried wiring — and ignoring them has real consequences.