If you plan to work on the receptacle, turn off the breaker, then use the tester to confirm that the power is off. Test for ...

we find clones of certified and tested electrical connectors, even when many would argue that so-called wire nuts are fire hazards no matter how many certification labels are on them. When it ...

Using a four-wire scheme requires unusual alligator clips that don’t electrical short the jaws ... you send a voltage through the device under test and measure the current through the wires.