Large buildings are often the subject of work, including factories, strip malls. The electrician who has the license with the number 309A is responsible to wire these structures as well as taking care of them once they’ve become operational. The electricians usually work under an electrician master as homeowner electrician or electrical contractor.
An electrician with a 309C license works on domestic and rural buildings. They’re electricians that wire farms and homes. These electricians typically are tradesmen employed by themselves , and also run their own businesses.
An electrician holding a 442A license works in industrial buildings. These are electricians who collaborate in buildings and continuously fix issues. Buildings are designed to use a large amount of electricity. They are similar to industrial structures that run on electricity for all their operations.
Electricians come with many certifications and specializations. When hiring an electrician you come across, make sure you know the one you need.