Nec Working Space Requirements

Relation to nec requirements.

Nec working space requirements. As a basic rule there should be at least 3 feet of space in front of all equipment with a 30 inch width as well as 6 feet of headroom space. The depth of the working space in the direction of live parts shall not be less than that specified in table 110 26 a 1 unless the requirements of 110 26 a 1 a a 1 b or a 1 c are met. Condition 1. How to determine requirements part 2.

Working space requirements appear in table 110 26 a 1. If you have a room that meets the above requirements 110 26 c 2 states that these electrical rooms must have an entrance egress that is at least 24 inches wide and 6 5 feet tall at each end of the working space. When there are i exposed live parts on only one side of the working space ii grounded live parts on the other side of the working space or iii when both sides of the working space are. You re not if you fail to comply with the following three clearance requirements in sec.

The national electric code. And 3 minimum headroom clearance of 6 ft or the height of the equipment whichever is greater. To be on the safe side the working space and space around electrical equipment should always be clear per 110 26 a if possible. Adequate clearance must be available around equipment in the vicinity of live parts to afford an opportunity to gain adequate clearance to avoid harm from the live.

Working space shall be provided and maintained about all electric equipment likely to require while energized. 2 a 30 in wide working space in front of equipment operating at 600v or less. Requirements by joseph douglas p e. 1 at least a 3 ft clearance in front of all electrical equipment.

Where equipment with overcurrent or switching devices rated 1 200a or more is installed personnel door s for entrance to and egress from the working space located less than 25 ft from the nearest edge of the working space must have the door s open in the direction of egress and be equipped with panic hardware or other devices that open under simple pressure 110 26 c 3. The purpose for the national electrical code is to provide a safe installation but article 110 is perhaps focused a little more on providing an installation that is safe for the installer and maintenance electrician so time spent in. As outlined in nec table 110 34 a these are. Space and nec worker safety requirements working space tasks such as troubleshooting and testing may require work in areas where live parts are exposed.

The chart above illustrates the varying requirements for the depth of the working space in the electrical room based on existing conditions. How to determine requirements part 1 the requirements in 110 26 a 1 through a 3 of the national electrical code nec. The clear working space that is required by the first sentence as described in 110 26 a may be eliminated only where examination adjustment servicing and maintenance are not likely to occur when. Technical details on electrical panel working space 2017 nec 110 26 a 1 depth of working space.