Electrician companies have highly skilled tradesmen. This is one of the trade professions where an apprenticeship is involved and required. An apprentice must work under the supervision of a licensed electrician for a specific period of time. The amount of time is determined by each licensing municipality.
Those that have chosen to become full-fledged, licensed electricians have gone through a ton of training and on-the-job work experience. They like what they do, take their work seriously, and are genuinely concerned for the safety of their clients. The state licensing tests are grueling and time-consuming.
These tests cover a wide range of areas pertaining to the field. Those taking the test must prove that they have proficient knowledge of electrical theory. They also need to know about local, state and national electrical and building codes.