What is the available short-circuit current measured in?

The available short-circuit current is measured in amperes. This measurement indicates the magnitude of the electrical current that can flow through a circuit during a short circuit condition. It is crucial for analyzing and designing electrical systems, as it helps to assess the potential impact of a short circuit on system components and safety devices such as circuit breakers and fuses.

Understanding current in amperes is fundamental in electrical theory, as it directly relates to the flow of electrons in a circuit. In the context of short circuits, knowing the available current allows engineers to choose appropriate equipment that can handle potential overloads and ensure safety and reliability in electrical installations.

The other measurement units provided—volts, ohms, and watts—serve different purposes in electrical theory. Volts measure electrical potential, ohms measure resistance, and watts measure power. While all of these concepts are interconnected through Ohm's law and the power formula, the specific focus on short-circuit scenarios requires the use of amperes as the pertinent measurement of current.