Individuals who are qualified electricians can repair a power supply. Electricians install and repair power systems in residential and commercial buildings. Special training and licensing are required to become electricians, according to the Houston Chronicle.
As of May 2011, there were 512,290 electricians in the U.S. and their median salary was $49,320. Individuals can study to become an electrician in technical and vocational schools, as well as some community colleges. Some states require electricians to obtain continuing education in topics such as electrical codes. In Florida, electricians need to receive 14 hours of training every two years in technical topics, workplace safety, business practices and workers' compensation, says the Houston Chronicle.