Apprentice electrician licenses are issued to individuals who are enrolled in registered apprenticeship or training programs approved by the Oregon State Apprenticeship and Training Council and the Oregon Electrical and Elevator Board. These programs provide occupational training that combines paid supervised on-the-job (OJT) experience with classroom instruction. Licensed limited renewable energy technicians install, maintain, finish, and remove renewable energy systems, including wind, solar, micro-hydroelectricity, fuel cells, and engine generators for off-grid systems. Work processes involve wire pulling and splices, conduit, flex, tray, and duct, control panels and controls, wiring devices, removal and finish work, the physical plumbing and installation of solar electric systems, and may include rooftop work, heavy lifting, digging and trenching, and other physical labor associated with the installation of solar electric systems.