Electricians install, alter, repair and maintain electrical systems designed to provide heat, light, power, control, signal or fire alarms for all types of buildings, structures, and premises. Electricians may be involved in construction or maintenance, or do a variety of electrical work. Electricians usually work a 40-hour, five-day week plus overtime when required.
Especially in construction, there may be no guarantee of permanent work. Working conditions can change dramatically from one job to another, varying from indoors in clean conditions to outdoors on scaffolding, to indoors in cramped conditions. There is some risk of injury from accidental electrical shock.