This answer is based on the 2017 NEC. A. Ground-fault protection of equipment is required for 277/480V service disconnects rated 1,000A or more. The rating of the ...

Key Takeaways Upgrading your electrical panel prepares your home for modern appliances and reduces fire hazards. Installing Ground Fault Circuit Interrupters (GFCIs) in wet areas prevents ...

What is ground-fault protection? The answer depends on whether you are talking about ground-fault protection of equipment or ground-fault protection of people. Just because ground-fault protection is ...

Complex grids depend on equipment such as transformers, protection relays, switchgear, and cables—each of which can develop faults not immediately visible during normal operation. As a result, ...

Power systems today operate in an environment where reliability and safety must be maintained despite rising loads, expanding ...

You might think that with all our modern technology and safety awareness, homes would have safe electrical systems by now.

Electrical standards for PV systems: In part one of this series we looked at the background and scope of the U.S. National Electrical Code (NEC). We continued with a survey of 2011 NEC coverage of ...

Understanding the advantages, limitations, and use cases of each technology helps engineers create reliable consumer products.

Protecting an electronic circuit from damage due to excessive current or heat is the primary function of many circuit protection technologies. In the past, this protection took the form of a fuse or ...

AREVA Transmission & Distribution has just launched a cost-efficient and user-friendly family of advanced numerical distance and differential protection relays in its MiCOM range AREVA Transmission & ...