Q: Is equipotential grounding now a personal protective grounding method required by OSHA?
A: The answer is yes, even though OSHA doesn’t specifically say so in terms we easily understand. The terminology isn't OSHA's fault. As an industry, we adopt certain familiar ways of describing or discussing things and simply don't recognize what OSHA is trying to communicate unless we do some diligent research. In 29 CFR 1910.269(n)(3), OSHA requires arrangement of grounds to protect employees without using the word “equipotential.” The title of the rule, however, is “Equipotential zone.”
The full text of 1910.269(n)(3) states, “Temporary protective grounds shall be placed at such locations and arranged in such a manner that the employer can demonstrate will prevent each employee from being exposed to hazardous differences in electric potential.” By definition, that is equipotential grounding.