In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...

Multimeters are indispensable tools when working on electronics. It’s almost impossible to build any but the most basic of circuits without one to test and troubleshoot potential issues, and they make ...

Written and presented by Jim Johnson, this HVACR technician training course presents an overview of the fundamentals of schematic diagrams. With a firm understanding of the fundamentals of wiring ...