Electrical Construction & Maintenance

Stumped by the Code? Motor Control Circuit Overcurrent Protection

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 ...
Electrical Construction & Maintenance

Remote Control and Signaling Circuits, Class 1

Courtesy of www.MikeHolt.com. Based on the 2020 NEC. Article 725 of the National Electrical Code (NEC) covers remote-control, signaling, and power-limited circuits that are not integral to a device or ...
ISA

Equipment Design: Advantages of NEC Class 2 Power Distribution Devices

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 ...
Machine Design

Basics of Flex Circuit Design

For reliability, designers must create flex circuits that are neither too thick nor bend too much. • Every flex circuit has a neutral-bend axis. • Smaller circuit thickness reduces the risk of damage ...
Machine Design

Do’s and don’ts in flexible-circuit design

• A flexible printed circuit is as much a mechanical device as it is an electrical device. • The neutral bend axis may not be in the exact middle of the material stack. • The reliability of flexible ...