In the case of Multiple GFCI’s on the same circuit, besides being incorrectly installed according to the UL listing, is this a potential hazard or just redundant? If it is a hazard, what is the potential hazard?
(Bottom line: does this increase or create a risk of electric shock?)
(Also, feel free to reference another thread if this has been discussed before. Couldn’t find it.)
No hazard. A big pain in backside though… Although you say on same circuit… when you mean on same circuit, you mean one wired after the other - as the second is wired to the load side of the first, or simply on same over current protection/breaker.
That’s what I mean–wired one after the other. First one trips normally and kills the second. Second one trips both but makes a rapidly repeating clicking noise when using test button on 3-light tester (many clicks when pressed for one second) and gives reading of “Hot & Ground Reverse” after tripping. Which I’m pretty sure is a hazard in this case because the outlet still has power…
They are both at the kitchen counter on opposite sides of the sink.
I am trying to think how wired to cause this. Have to go out to shop and wire some up and play to see if I can duplicate it. I can see how the first would kill both, if second is wired on load side of first. If a fault were placed on second one, it should trip - am not certain what would happen to first which is why I want to play a bit. However, once tripped, there should be no voltage present once tripped. At this point I am not sure what to say, will try to duplicate tonight. But without further details, would suggest it be checked based upon what you state as observations.
The GFCI terminals are clearly marked “Line” and “Load.” As an added safety improvement, one manufacturer markets a 15A, 125V receptacle with a built-in line-load reversal feature that prevents the GFCI from resetting if the installer mistakenly reverses the load and line connections."