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Homeowner, meet the Ground-Fault Circuit Interrupter

Things can change in the blink of an eye. Ask your son or daughter how to use a rotary telephone and see the blank...

It’s Time We Update UL-943 Again

This observation was made by Charles Dalziel, who studied the effects of electricity on the human body. An electrical engineer, and professor of electrical...

UL Question Corner — Self-testing GFCI Requirements

Question I’ve heard GFCIs are now required to have a self-test feature. What is the new GFCIs self-test feature all about?  What does it do...

Now that industrial GFCIs are here, inspectors have a proactive option...

UL Class A ground-fault circuit interrupters (GFCI) began to be required in kitchens, bathrooms and outdoor outlets in the early ’70s, and have saved many...

GFCI and AFCI Basics

GFCI and AFCI protection have both become fundamental safety devices in electrical systems. Understanding the basics of ground-fault protection for people, and arc-fault protection...

GFCIs and Electrocution

"According to Acting Chairman Anne Graham of the U. S. Consumer Product Safety Commission, "The GFCI shock protector constantly monitors electricity flowing through a...

GFCIs – Where are they?

The 2009 Canadian Electrical Code is peppered with references to, and requirements for ground-fault circuit interrupters (GFCIs). For very good reasons, GFCIs have become...

The Illusion of GFCI Protection

During the required annual pool inspections for commercial indoor pools, the inspector happened upon a ground-fault circuit-interrupter (GFCI) device, with a water cooler connected...

Part III: Transfer Equipment Applications and Considerations

Transfer equipment installations can be extremely complex, even for optional standby arrangements that are critical to business operation. This is the final installment in...

GFCIs and Swimming Pools – A Natural Fit

Most of us have seen or read something about the figure commonly known as thefire triangle(oxygen, heat, and fuel), which is a working model...
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