In the NEC, the normal philosophy for circuit protection is to shut down equipment before allowing the supply conductors to overheat. Article 695 departs from this philosophy. The fire pump motor must ...

Article 695 covers the electric power sources and interconnecting circuits for electric motor-driven fire pumps. It also covers switching and control equipment dedicated to fire pump drivers. Article ...

The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...