High vibration is a common problem for motors installed on top of vertical pumps. Its source can stem from a mechanical issue with the pump, motor, or coupling — or even hydraulic forces from the pump ...

All questions and answers are based on the 2014 NEC. Q. What is the NEC requirement for GFCI protection of swimming pool pump motors? A. For this question, it’s important to understand the NEC ...

In hydronic heating and cooling systems, circulator pumps move water or refrigerant throughout a closed-loop system in order to transfer energy from the source to the point of need. While older ...

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 ...

Feeding today’s horsepower demands with yesterday’s fuel pump technology is a losing proposition. Here’s a look at the latest the industry has to offer. Everyone knows that airflow equals power, but ...