You probably can’t tell if something with the electricity or the wiring of the house is going wrong until something blows up due to a spark or short circuit. It is necessary for your safety to make sure that the electrical system is working perfectly as a small fault can result in a very bad accident, injury and even loss of life. There isn’t a lot that you’ll have to do apart from making a maintenance schedule and arrange for a professional to come and check the system for any faults.
Your electrical system has many components and if one of them comes loose or breaks down, it can cause one or more of the electrical appliances of the house to short circuit. Not just that, a mere spark can cause a full-fledged fire (http://www.handymantips.org/master-electrical-services/). This is very likely when you haven’t gotten your system evaluated in a long time and the components that are used in your system have gone out of date. Most people never change the wiring or other components of the electrical system and better things are being invented simultaneously and so the older technologies are not considered as up to modern standards of safety.
You save yourself from many calamities when your electrical system is in check. A professional electrician will tell you if there is anything that needs to be fixed beforehand so that no harm reaches your devices. Due to this, your appliances are also protected and a good supply will also enhance their life. You might be breaking a law if you’re using appliances that are not up to modern safety standards. A professional will let you know if you’re breaking a law so that you’re saved from penalties that come with non-compliance.