In these turbulent times, many people have installed alarm systems in their homes which give them a sense of security. There are various types of burglar alarms which are either connected to a central system or not. But one thing is clear; the system will only work if all the wires are intact, the switches set in the right sequence and the unit is in working order. It is a good idea to test it every now and then to make sure the system is in proper operating condition. Just one frayed connection can invalidate the whole system.