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Electrical Receptacle Tester with GFCI Diagnosis
DescriptionThe AMES™ Electrical Receptacle Tester checks GFCI outlets for proper operation and checks for seven wiring conditions overall. Simply place tester in outlet. Press black "overload" button to test circuit interruption.
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Discussed in Best way to eliminate ground loop noise? in the TalkBass community
Go to your local hardware store and purchase a voltage tester ($5 - $10 max). It plugs in and tells you if your wall sockets are properly grounded and wired. Electrical Receptacle Tester with GFCI Diagnosis Undo the DI for now, and does your amp have a polarity switch? Are your computers and bass rig on the same circuit? ... ... more
These don't check for a proper ground. You can tie the "ground" to neutral and it won't show an error. ... more