A common misconception about NFPA 70E is that it “doesn’t apply to us.” This misconception arises because “we’ve always done it this way.” It’s really an emotional resistance to change rather than a logical conclusion.
Adherence to this standard really isn’t optional, if it does apply to you. It’s an industry standard; both OSHA and the courts put a heavy weight on following industry standards in determining the extent of liability and financial penalty. Many companies have welcomed this standard--it helps them meet their safety goals. And that is the main purpose for which NFPA 70E was created.
It generally doesn’t apply to marine and utility installations. It generally does apply to any installation of conductors and equipment (e.g., “utilization equipment" that connect to the supply of electricity), including offices (even if used by utility companies).