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 ...
One of the principal NEC requirements for circuit protection is that you shut down the equipment rather than let supply conductors melt from overload. This can cause confusion, however, because Art.
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 ...