They dont have any formal training into it. When it comes to electrical matters, you dont just let anyone handle the tasks. Instead, you go for the best. And here is what makes the best electrician .
It is the first question to ask the electrician. Are you licensed? If they give you a yes, then you go ahead and ask for confirmation of the same. Those who are not licensed or with fake licenses will hesitate to comply. The license can be a small document but it proves a strong point. For one to acquire a license, he/she has to have undergone the right training and is experienced in the field.