Abstract: A multi-functional intrusion warning system is used directly in the conventional circuitry of a building such as a home, small business or the like, having a conventional AC power source, a plurality of branch circuits and a circuit breaking means (located intermediate the power source and the branch circuits for interrupting the current to any branch circuit experiencing a current surge) to provide the building with a means of controlling the current to certain or all of the branch circuits which enables the power to be cut off to these branch circuits and then turned back on due to an occurrence detected by a motion, sound, smoke, heat, and/or telephone call activated or similar detection device. The lighting, alarms, and/or other electrical devices on these branch circuits are activated when the detection device activates the control unit of the intrusion warning system.