Electricians install and maintain electrical power, communications, lighting, and control systems in homes, businesses, and factories. Electricians typically do the following: Read blueprints or technical diagrams Install and maintain wiring, control, and lighting systems Inspect electrical components, such as transformers and circuit breakers Identify electrical problems with a variety of testing devices Repair or replace wiring, equipment, or fixtures using hand tools and power tools Follow state and local building regulations based on the National Electric Code Direct and train workers to install, maintain, or repair electrical wiring or equipment