Apprentices also learn to set up and draw diagrams for entire electrical systems. Apprenticeships are often sponsored by unions, electrical contractors' associations, or electrical contracting companies. Those who complete apprenticeships are qualified to do both maintenance and construction work. Electricians who learn the trade informally usually start as electricians' helpers. While learning to install conduit, connect wires, and test circuits, they learn safety practices.
Many helpers also take correspondence courses or classes at trade schools.
Experienced electricians periodically take courses about changes in the national electrical code, materials, or methods of installation. Requirements vary by state. Contact your state Board of Licensing for more information about an electricians license.