This is a user manual that introduces the use of Extech ET10 GFCI receptacle tester.
The Extech ET10 is a standard receptacle tester designed to indicate correct, open neutral, open ground, reversed hot/neutral, and other common wiring faults in electrical outlets. It also includes specific functionality for testing Ground Fault Circuit Interrupter (GFCI) receptacles.
Before using the device, it is recommended to test it on a known good circuit. The guide details how to verify standard outlet wiring by observing indicator lights 1, 2, and 3, as well as procedures for testing GFCI outlets by pressing their built-in TEST button before plugging in the ET10.
Before using the tester, press the TEST button on the installed GFCI receptacle; if it trips, press RESET and plug in the tester.
The tester will not indicate the quality of the ground connection.