HVAC technicians routinely work on heat pumps, variable-speed drives, and control panels — equipment that often requires them to open panels and troubleshoot energized circuits. In many states, this work falls under an electrical license or requires supervision by a licensed electrician.
Because technicians frequently encounter live electrical components, OSHA and NFPA 70E require them to be trained as “qualified persons” for electrical safety, making QEW-level training a critical safety expectation.