Q. In the past you’ve written about special outlets for the garage. What should I install? I’m selling my house to my son and I want everything to be safe. A. Your question is timely because I ...

Q. My home was built in the 1950s, and I don’t have ground fault circuit interrupter outlets. Should I have them installed? A ground fault circuit interrupter, or GFCI, protects people and animals ...

BOULDER – One of the most common issues found during a home inspection is missing GFCI receptacles or circuits. GFCI units are electrical outlets equipped with a ground fault sensor and a circuit ...

Do-it-yourselfers face special hazards of electrical shock during winter and spring, when damp conditions often exist inside and outside homes because of melting snow and frequent rains. The risk is ...

Thank you for visiting one of our most popular classic articles. If you’d like to see updated information on this topic, please check out this recently published article, Recent Rule Changes for GFCI ...

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 ...

Fig 1. Placing this two-terminal circuit between a GFCI line-load terminal and ground creates an adjustable line-voltage limiter. Fig 2. With the trip point set at 133 V rms, the circuit draws less ...

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 ...

BOULDER – One of the most common issues found during a home inspection is missing GFCI receptacles or circuits. GFCI units are electrical outlets equipped with a ground fault sensor and a circuit ...

A core-balance protection device serves as an example of how these switches operate. Phase and neutral power conductors pass through a toroidal (differential) current transformer. Under normal ...