Old home has ungrounded GFCI near the sink, trips with the test button, but does not trip with a GFCI tester, I know this is normal.(but dont really understand why) My question is on the other side of the sink the outlet is linked to the GFCI but does not have a test button. Power goes off when the test button on the first GFCI is pushed.
How does this protect anyone if you have to push the test button to cut power. I dont get it, make me understand.