They can last longer, however. One of the largest single components in a forced air gas system is a heat exchanger that can crack and emit deadly carbon monoxide into the home. These heat exchangers can not be repaired and must be replaced. Over fusing or unsafely fusing an electrical circuit can cause fires. This occurs when more amperage is drawn on the circuit that the wire was intended to carry.
Protection comes from properly fusing the circuit.
Safety is key in any home. Security systems are a good idea but there are several other areas that can increase a home's safety too. For example, proper locks on windows and patio doors, smoke detectors in every bedroom and level of the home, carbon monoxide detectors, and, dead bolts, to mention but a few. The structural integrity of a home is fundamental to a good home. Sometimes problems can arise over time that will require attention.