These terms are sometimes used interchangeably. However, the roles are often different: Electricians are mostly involved in maintaining and installing wiring and electrical systems for structures., Electrical technicians are frequently more involved with maintaining and repairing equipment, machines, or devices that use electricity. The term "electrical technician" is also sometimes used for: People who assist electrical engineers with the design, testing, and production of devices powered by electricity, Apprentices in the electrical trade who are under the supervision of journeyman electricians, Tradespeople who primarily work with low-voltage electrical systems.