A short circuit happens when part of a wire carrying electricity touches another part of the circuit or other conductive material, thus giving electricity a pathway that offers less resistance than the circuit is designed to handle. When short circuit occurs, it should be attended quickly, as they can cause serious damage. In normal operation, electricity source provides voltage to create a current through the wires in a circuit. As a rule, current will follow through the path of least resistance. In a short circuit, this flow is interrupted and acts differently. The short will create a high unintented flow of current, and can cause sparks or fire.
Preventing Shorts
Keeping up on your breaker box will go a long way in preventing dangerous shorts. Also make sure that outlets in your home are inspected occasionally for damage. If you find damage to an outlet, stop using it immediately and contact an electrician to fix it. Also, make sure that any appliance that is plugged in is in good working order, with no fraying or split cords. When you are wiring a new project, make sure you take your time and follow all directions to prevent shorts from occurring later.