All questions and answers are based on the 2011 NEC. Q. What is the Code rule for motor control circuit overcurrent protection? A. Motor control conductors that aren’t tapped from the branch circuit ...

Per 2014 NEC Article 100, short circuit current rating (SCCR) is defined as: “The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected ...

Article 409 provides the minimum safety requirements for industrial control panels (What's an Industrial Control Panel? below). Because this section of the Code is only a couple of pages long, it ...

A new type of device provides designers of automated installations for North America with performance, cost, and safety benefits. Industrial machinery and equipment system designs typically rely on ...

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 ...

Telecom-equipment manufacturers typically have chosen magnetic circuit breakers rather than the less-costly thermal units in 48-V distribution panels because they offer higher voltage ratings and low ...

As a standard for industrial communications, the RS-485 differential interface is useful in communicating long distances where immunity to common-mode noise is an important requirement. RS-485 ports ...