The correct answer is: d) excessive heating due to motor overloads and failure to start You'll find the rules for motor and branch-circuit overload protection in Part III of Art. 430 in the 2011 NEC.

Motors and their associated equipment must be protected against both overload and overcurrent (short circuit or ground fault). This function is usually split, with ...

Electrical Power & Control has released a detailed resource examining why motor starters are behind more industrial downtime than facilities expect — covering failure patterns, preventive maintenance, ...

The usual way of preventing a small motor from drawing too much current is to install overcurrent protection in the form of a circuit breaker or some other kind of limiter. But installations that ...

Motors make the HVAC world go ‘round — or, at the very least, in the HVAC business, they make the air go ‘round. And while some motors last for many years without any issues, others stop working ...

In troubleshooting situations involving a motor, more than half the battle is simply isolating the problem. Whenever there’s a working motor, there’s a load and there’s some sort of motor controller, ...

In engineering, indexing is the movement from an initial position to a new position, starting and ending in rest. Mechanical cam-driven indexers are motion-control devices that use physical parts to ...