The fixture or appliance cord may have a wiring problem, a cord plug could be defective, or the light socket may be defective. The light bulb (and everything else) suddenly goes dark.Ī short circuit can be caused by a number of circumstances. This sudden increase in current flow causes the circuit breaker to trip (or the fuse to blow) and stop the flow of current. This situation causes resistance to lessen, which vastly increases the flow of current through the circuit. The official definition of a short circuit is a condition in which the electrical current flows outside the established wiring pathway. A short circuit in the wiring of the circuit can cause the light fixture-as well as all other devices on the circuit-to suddenly go dark. This is another instance where a light bulb that suddenly goes dark is not burned out at all. The Spruce Home Improvement Review Board.
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