1 minimum depth of clear working space in front of electric equipment with a nominal voltage to ground above 25 000 volts may be the same as that for 25 000 volts under conditions a b and c for installations built before april 16 1981. 1910 137 for general industry and 1926 97 for the construction industry which have essentially the same requirements. Like any other type of ppe electrical protective equipment is necessary when your employees are exposed to an electrical hazard.
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