Each motor branch circuit must be protected against short circuit and ground faults by an overcurrent device sized no greater than the percentages listed in Table 430.52. A branch-circuit ...

Rosenstark’s brilliant idea was to perform a pair of loop measurements with the return side terminated first on an open circuit and then on a short circuit , and then to suitably combine the two ...

But what IS a short circuit? A short circuit happens when an electrical current flows outside of its intended circuit with no resistance to the flow.