A good indication that a motor may be overloaded is overheating, or in some cases not starting at all. For HVAC motors it can be as simple as belts that may be too tight, inadequate wiring, or voltage ...
Art. 430, Part III provides the requirements for motor and branch-circuit overload protection. Because of inrush current, overload protection is separate from overcurrent and ground fault protection ...
Art. 430, Part V provides the requirements for motor feeder short-circuit and ground-fault protection. It specifies protective devices intended to protect motor feeder conductors from overcurrents ...
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