Applicants for apprenticeships usually must be at least 18 years old and have a high school diploma or a G.E.D. They should have good math and English skills, since most instruction manuals are in English. They also may have to pass a test and meet other requirements. Apprenticeship programs usually last 4 years and each year include at least 144 hours of classroom instruction and 2,000 hours of on-the-job training. In the classroom, apprentices learn electrical theory and installing and maintaining electrical systems.
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