This clearance is different if the 480 volt electrical panel faces a wall where other electrical panels are located. The nec requires that there be a minimum of three feet of clearance in front of a 480 volt electrical panel.
Modern Residential Wiring 9th Edition Page 166 166 Of 364
Osha electrical panel clearance diagram. 1 minimum depth of clear working space in front of electric equipment with a nominal voltage to ground above 25000 volts may be the same as that for 25000 volts under conditions a b and c for installations built before april 16 1981. According to the osha standard 29 cfr 1910303 g companies are required to provide 3 feet of clearance around electrical services and breaker panels with between 120 and 250 volts. Osha standard 1910303g1 states. 2 where can i find the calosha regulations for electrical safety. 2 conditions a b and c are as follows. In addition to osha standards electrical panels fall under national electrical code nec regulations.
Width of working space around electrical equipment nec 11026a2 working space around electrical equipment must be as wide as the equipment or 30 inches whichever is greater. Equipment grounding only works when there is a permanent and continuous electrical connection between the metal shell of a tool and the earth. A clearance of at least 3 feet is required for equipment using 120 to 250 volts. 2 a 30 in wide working space in front of equipment operating at 600v or less. This is generally done via clamping a system ground wire to a metal cold water pipe or to ground rods driven into the earth. Failure to maintain proper clearance from overhead lines failure to follow manufacturers instruction when using electrically powered equipment.
This clearance is measured for the live electrical parts or front of the electrical panel. Clearance around an indoor electrical panel nec 11026 clearance for conductor entering in panel nes 4085 clearance between bare metal busbar in panel nes 4085 clearance of outdoor electrical panel to fencewall nes 11031 working space around indoor panelcircuit board nes 11034 clearance around an outdoor electrical panel nes. Before implementing any kind of marking strategy employers must understand the osha standard related to electrical panel clearance. Notes to table s 2. And 3 minimum headroom clearance of 6 ft or the height. 110 26 of the national electrical code nec.
To ensure that an electrical panel can be accessed at all times during inspection maintenance or emergency osha has determined that the working space in front of the equipment must be at least 30 inches wide or the width of the equipment. Space about electric equipment. Youre not if you fail to comply with the following three clearance requirements in sec. 1 at least a 3 ft clearance in front of all electrical equipment. Height of working space around electrical equipment nec 11026a3 for installations built before august 13 2007 the height of the working space must be 625 ft. Sufficient access and working space shall be provided and maintained about all electric equipment to permit ready and safe operation and.
Condition a exposed live parts on one side and no live or grounded parts on the other side of. Calosha regulations on electrical safety require california employers to provide workers with a safe and healthful workplace. Are you protecting yourself from electric shock and burns. The working width around the panel must be at least 30 inches. The steel electrical panel is then connected to the earth.
Gallery of Osha Electrical Panel Clearance Diagram
