A cable, raceway, or box, installed in exposed or concealed locations under metal-corrugated sheet roof decking, shall be installed and supported so there is not less than 1 ½ inches measured from the lowest surface of the roof decking to the top of the cable, raceway, or box. An outdoor electrical distribution box serves as the critical junction point where incoming power lines are split into multiple branch circuits for outdoor installations, parking lots, building exteriors, and industrial facilities. Under these conditions, the conductor may swing or sag considerably towards the building or structure compared with its usual position, and that. Working space: The front clearance, side clearance, and height clearance requirements for electrical equipment that provide a safe area for maintenance, inspections, and other work. Code Change Summary: A new exception was added to. 22. 8m) above a pool (surface of water). 4m) measured horizontally from pool wall or diving structure. No other conductors of any type attached. Electrical clearances are the minimum separation distances the National Electrical Code (NEC) requires between wiring, panels, overhead conductors.
