I’ve been a pro-sound engineer for 40+ years and a musician for 50+ years. During that time, I’ve witnessed hundreds of shock events on performance stages, recording studios, and even factory floors.

The concept of an outlet tester is pretty simple: plug the gadget into a suspect wall receptacle, and an array of LEDs light up in various patterns to alert the user to any wiring faults. They’re ...

The concept of an outlet tester is pretty simple: plug the gadget into a suspect wall receptacle, and an array of LEDs light up in various patterns to alert the user to any wiring faults. They’re ...

Q: How do you find out if an outlet isn’t working? — Jane in Providence, R.I. A: A voltage tester is your best friend in this situation, allowing you to test a receptacle for electric current without ...