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Electrical contractors who specialize in commercial buildings provide a variety of services. These services include installing, maintaining, repairing, and troubleshooting electrical wiring and systems. They can install and maintain lighting, power, and data systems, as well as security and fire alarm systems. They can also provide design and installation of new electrical systems, as well as retrofitting older buildings to meet current electrical requirements. They may also offer energy management services, such as installing energy-efficient lighting and equipment.