What is a short circuit?
Q: What is a short circuit?
A: A short circuit is a problem in an electrical circuit where two or more wires that are not supposed to come in contact with each other touch.
Q: What are the consequences of a short circuit?
A: A short circuit can result in a very high current flowing through the circuit. The high current can destroy components, melt insulation and start a fire. If there is enough voltage, it can also cause an explosion called arc flash.
Q: How do circuit breakers and fuses work?
A: Circuit breakers and fuses are devices that detect short circuits and (usually) shut the power off before any damage can be done.
Q: How does a "short circuit" happen without wires touching?
A: A "short circuit" also happens when there is a bypass of electrical current. As electricity is "lazy", when there is a bypass without a "load" (e.g. Bulb), it will travel that route of least electrical impedance.
Q: How is the term "short circuit" frequently misused?
A: The term "short circuit" is frequently misused to describe any electrical problem.
Q: Why is it important to have circuit breakers and fuses in place?
A: It is important to have circuit breakers and fuses in place to detect short circuits and shut the power off before any damage can be done.
Q: What can be damaged by a short circuit?
A: Components can be destroyed, insulation can melt, and fires can start as a result of a short circuit.
