Qualified personnel must be knowledgeable of the electrical equipment or systems that they work on, the inherent electrical hazards and how to avoid them. OSHA 1910 Subpart S-Electrical and NFPA 70E (8) hour training, including refresher training, is required for personnel assigned to facility maintenance and service responsibilities related to electrical equipment and facility electrical systems. Training shall include electrical safety work practices and the protective measures necessary to avoid shock and burn injury hazards.