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ELECTRICAL SAFETY DESIGN |
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General Requirements - 600 Volts, Nominal or Less |
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1910.303 also addresses the safety of persons qualified to work on the
equipment, but who do not remove guards and enclosures in order to work on live parts. Table S-1 of 1910.303(g)(1)(i) lists the minimum dimensions for working space in the direction of access to live parts operating at 600 volts or less and likely to require examination, adjustment, servicing, or maintenance while energized except where required or permitted in Subpart S. In addition, work space may not be less than 30 inches wide in front of the electrical equipment measured from exposed live parts, or from the enclosure front or opening if the live parts are enclosed. Concrete, brick, or tile walls are considered to be grounded. Working space is not required in back of assemblies such as dead-front switchboards or motor control centers where there are no renewable or adjustable parts such as fuses or switches on the back and where all connections are accessible from locations other than the back. Working space shall not be used for storage. In addition the working space access, illumination, and headroom shall be adequately maintained. |
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