Timeline for GFCI Breaker - Good or Bad?

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Jul 10, 2020 at 21:46 comment added supercat Another possibility, depending upon the design of the tester, would be that there isn't a good ground connection, but there's enough of a ground connection to make the light glow. Some neon lights can be illuminated with very small amounts of current (which is how neon-based non-contact testers work). If a ground connection can pass 1mA, that might be enough to light a tester, but not enough to trip a GFCI.
Jul 10, 2020 at 18:03 comment added Harper - Reinstate Monica @Radar Absolutely. Very possible that Person 1 came along and did just that, and a 3-lamp tester would indicate 1 yellow in that instance. And this would be made OK and approvable by the presence of a “GFCI Protected / No Equipment Ground” sticker which Person 1 neglected to apply, causing a code violation. And then, perhaps Jackass 2 came along, had no idea about the GFCI, because there’s no sticker, and bootlegged ground to get 2 yellow lights to fool the inspector. Now we’re in the danger zone. GFCI+bootleg ground.
Jul 10, 2020 at 17:42 comment added Radar Is it not possible that the GFCI was installed precisely because a ground is not present at all at the receptacle and the GFCI was therefore added as a safety mechanism for the entire circuit? It's certainly easier to install a GFCI breaker rather than add a ground wire to older 2-wire setups. This is easy enough to check by removing the cover plate and looking for (the lack of) a ground wire.
Jul 10, 2020 at 13:50 comment added Michael Kohne Bootleg ground is when someone creates a 'ground' by connecting ground and neutral at the outlet - which is NOT correct or safe.
Jul 10, 2020 at 13:06 comment added StayOnTarget Can you elaborate on what 'bootleg' would mean? Is that like using the neutral as ground in a 2-wire situation?
Jul 10, 2020 at 3:54 comment added BowlOfRed Any chance it's not a class A breaker and the tester's trip current is below threshold?
Jul 9, 2020 at 20:25 history answered Harper - Reinstate Monica CC BY-SA 4.0