Are various methods developed for calculating available fault current all based on Ohm's Law?

The assertion that various methods developed for calculating available fault current are all based on Ohm's Law is false. While Ohm's Law is a fundamental principle in electrical engineering and plays a role in understanding current flow, fault current calculations can utilize a variety of methodologies that incorporate more than just Ohm's Law.

Different methods consider various factors such as system configuration, the type of fault (e.g., three-phase, single-line-to-ground), and the impedance of the components involved in the system. Some methods may use circuit analysis techniques that go beyond pure resistive calculations, including the use of Thevenin or Norton equivalents, or may factor in the reactance and inductance of components in the system.

Therefore, while Ohm's Law can be a component of the calculations, it is not the sole basis for all the methods used to calculate available fault current. This distinction is fundamental to understanding how electrical systems respond under fault conditions and the implications for safety and design.