Electrical systems are not self-sustaining but they will have to be repaired often and also serviced on a regular basis. Unless you have trained in the field, this is not something you want to be messing around with. Electrical energy is powerful enough to shock people to death if not leave them bedridden. This is why you should always call a qualified electrician if you want the system to be repaired or serviced. Formal training or apprenticeship is crucial for someone to work as an electrician and this is something you should be sure of even before you proceed with other issues. Someone who decides to self-train in electricity should have a mentor in the field and if this is not the case you should not be putting yourself at risk. Apart from the academic qualification, the business should be operating legally which means it should be licensed. Remember that the law cannot protect you if you knowingly hired someone who is offering the services illegally. The best electricians will hand over the documents even before you ask.
Shocks and even fires are some of the common accidents when the electrical system is being serviced or repaired. These are risks which you will bear if there is no insurance. It can be a great inconvenience not to mention that the project might have to be postponed. Something that started small might become too much. The simplest way to make sure you do not go through such an ordeal is to only hire an electrician who has an insurance cover. People can tell you that the insurance cover is active even when it is not so that they can get the job which is why you should follow up with the said insurance company to make sure that the policy is active. Not confirming the policy status will be your loss because the biggest victim will be you if things do not work out. Do not let anyone intimidate just because you do not want to leave anything to chance.
Ensure you have referees who can be contacted in case you want to follow up on something. A referee is not just anyone who says he or she knows the candidate but they should have had a professional relationship at some point to the extent that he or she can tell you more about who the candidate is and what you will get from them. This website will help you find reliable electricians.