No personal offense is meant, but realistically, it's splitting hairs to differentiate drives and contactor panels from industrial-control panels, particularly for basic energized troubleshooting sanity. Prevention of grisly deaths and injuries has evolved into the practical Article 110 minimum requirements over many code editions. Recognition and adaptation of the rudimentary physics in Ralph Lee’s early-1980’s work on arc-blast fundamentals are past due.
UL-standards boilerplate should eventually catch up with code-mandated signage, and become part of the routine equipment-manufacturing process like other tagging.
