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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 ...

A friend who was buying an older house was concerned about electrical safety and asked for my opinion as an electrical engineer. All of the AC receptacles (also called outlets) in the house were the ...

Siemens SENTRON air circuit breakers are enhancing low-voltage protection and switching with fault protection with digital ...

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 ...

Researchers have developed a fast prediction and suppression method for transient piston displacement overshoot in free ...

Explanation: Section 427.22 requires heat trace cable on pipelines to have ground-fault protection of equipment, not personnel. Lupacchino is a senior design engineer with Gaylor Electric, Inc. in ...