Electricity moves in a circle called a circuit. A short circuit, often called a short one, is defined as one that allows electricity to travel a different path than originally planned. Often a short one will cause a pop fuse, especially when it is on the positive side (hot) of the circuit. A short one should not be confused with an open, or a high-strength circuit. This is when there is a break in the side of the earth or the warm side of a circuit that no longer allows electricity to complete its path. A short circuit can be diagnosed in a few simple ways.
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