Maintenance electricians maintain the electrical systems installed by construction electricians.
Most localities require electricians to be licensed.
Although licensing requirements vary from area to area, electricians usually must pass an examination that tests their knowledge of electrical theory, the National Electrical Code, and local electric and building codes. All applicants should be in good health and have at least average physical strength. Agility and dexterity also are important. Good color vision is needed because workers must frequently identify electrical wires by color. They may stand for long periods of time and frequently work on ladders and scaffolds.