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Closed circuit means a complete electrical connection around which current flows or circulates. When you have a series of electrical wires connecting to each other and completing a circuit so that current travels from one end of the circle to the other, this is an example of a closed circuit. An open circuit is one where the continuity has been broken by an interruption in the path for electrons to flow. A closed circuit is one that is complete, with good continuity throughout. A device designed to open or close a circuit under controlled conditions is called a switch.
Sorry, there was a problem. Please try again later.Thank you for your inquiry. If a surge were to come through the coax connection then unit would shunt the surge to ground or sacrifice itself to prevent the surge from passing on to your equipment. So it would not fail in the open position.
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