602 × 602
Source:https://www.quora.com/What-do-the-red-and-black-buttons-on-an-electrical-outlet-do
940 × 940
Source:https://www.simonelectric.com/intl/31432-67-schuko-socket-outlet-16a-250v-with-safety-device-and-screw-terminal-connection-red-simon-31.html
4000 × 3000
Source:https://www.reddit.com/r/AskElectricians/comments/xx9ql4/gfci_i_pressed_test_and_reset_but_red_light_is/
386 × 686
Source:https://www.youtube.com/watch?v\u003d5a-yukZJJuQ
360 × 480
Source:https://www.mastermylist.com/electrical-blog/how-to-test-gfci-outlet-bathroom-kitchen/
1000 × 616
Source:https://www.amazon.com/Indicator-Tamper-Resistant-Weather-Resistant-Receptacle/dp/B08N5HJ337
702 × 1248
Source:https://lifehacker.com/why-your-electrical-stuff-sometimes-stops-working-until-1850263390
1864 × 1244
Source:https://www.bhg.com/home-improvement/electrical/how-to-test-an-electrical-receptacle/
2152 × 1491
Source:https://tomkotarba.wordpress.com/2012/05/04/outlet-1-red-triangle/
768 × 768
Source:https://www.walmart.com/ip/DEWENWILS-15A-GFCI-Outlet-Receptacle-Self-Test-LED-Indicator-Tamper-Resistant-Weather-Decorative-Wallplate-Included-UL-Listed-2-Pack-White/1429259706