OSHA 29 CFR 1910.332 Training states:
(a) Scope. The training requirements contained in this section apply to employees who face a risk of electric shock that is not reduced to a safe level by the electrical installation requirements of §1910.303 through 1910.308.
NOTE: Employees in occupations listed in Table S-4 face such a risk and are required to be trained.
TABLE S-4 TYPICAL OCCUPATIONAL CATEGORIES OF EMPLOYEES FACING A HIGHER THAN NORMAL RISK OF ELECTRICAL ACCIDENT
Blue collar supervisors, Electrical and electronic engineers, Electrical and electronic equipment assemblers, Electrical and electronic technicians, Electricians, Industrial machine operators, Material handling equipment operators, Mechanics and repairers, Painters, Riggers and roustabouts, Stationary engineers, and Welders.
Other employees who also may reasonably be expected to face a comparable risk of injury due to electric shock or other electrical hazards must also be trained.