Often I have difficulty finding the GFCI master for a series GFCI outlet. Say an outdoor outlet or a bathroom outlet without the GFCI reset button. I know all the places to look for the master but often not there. Sure the master can be in obscure places but I believe there are tools that allow tracing the series GFCI to find the master GFCI for that specific outlet. Recommendations please.
I’m not sure or ever head of a tools for finding the “master GFCI”. If there is one, someone will chime in here.
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If there is one (doubtful) it’ll be shockingly expensive, and require a 7 minute boot-up time at each outlet before it tells you “device not found”.
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There are wiring “tracers” which you plug a device into an outlet and a sensor tells you which breaker protects that circuit. Which might be helpful, although does not do specifically what you asked.
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I think that is about as close as you’ll get when using a simple tracing tool.
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I’ve never tried it, but you may be able to trace to the “next” outlet etc. giving you an idea which way the wiring “might” be headed.
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These newer kitchens with the clear backsplashes and undercounter outlet strips are nightmare sometimes. I swear the sparkies just like to screw with us and hide the masters.
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Over time I’ve figured where the GFCI reset most likely is based on the age of the house.
What’s really fun is when you have multiple GFCI’s on one circuit, like I had the other day. I ended up actually being able to determine the routing of the circuit because they won’t reset until the receptacle is energized. The house was built in the late 80s and the main GFCI reset for the receptacles located in the garage, exterior receptacles and bathrooms were at the GFCI in the garage. Every receptacle was a GFCI receptacle.
I include all GFCI reset locations in my reports.
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Afternoon, Robert Lam. Hope to find you well.
I hear you brother. Been in homes with as many as 5, 6 and even 7 GFCI protected outlets. Resets were outside. Crazy!!!
Robert, I found that first identifying the GFCI outlet with a “Test” and “Reset” button, as the most upstream protection as these GFCI outlets protect outlets downstream:-)
Typically bathrooms are run in series with bathrooms. Kitchens with exterior GFCI outlets.
It’s a crap shoot. I once found two bathrooms and the exterior run through a laundry-room GFCI (unusual to find in an older home). If the home is vacant, just continue the inspection and you have pretty good odds that you will eventually find the tripped “master.” It could also be one of the GFCI’s that you already tested. Using a line tracer would be time intensive and might not help; listening very carefully for where the “click” comes from is your best clue.
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Yea, but those lollipops make an awful mess!
I always wince a little before testing. Can I find it? Will it reset? I know, I have no problem refusing to accept responsibility for a faulty GFCI that will not reset. But who wants to deal with that? It is often a broken record of frustration for everyone. This is the only system that I have such trepidation. Dishwashers are in second place to GFCI. And I don’t so spa tubs, lol.
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FYI. I recently encountered a blank GFCI in the garage on a 2021 Palomar home that had all the exterior receptacles connected to it. Very logical; I hope it becomes a trend with sparky. There is also an AFCI version. According to the specifications, these are self testing, which is also a welcome advancement.
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I carry this exact tool in my Van. It doesn’t get a lot of use, but when it does, boy is it worth it.
Yes but that’s the secret to their “stick to it” attitude to find everything!
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It’s always difficult to find something that doesn’t exist. There’s no such thing as a “Series GFCI outlet”.
All receptacle outlets, whether GFCI or any other kind, are always connected in parallel. Receptacles downstream of a GFCI receptacle are not in series. The GFCI receptacle is not in series with anything.
They can’t be in series because the algebraic sum of all voltages around any closed loop in a circuit is equal to zero. If they were in series, the Voltage drop across each load would be proportional to the resistance or impedance in each load, but it wouldn’t be 120V across any of them. The result would be a lot of stuff not working properly.
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What’s fun is when you run into “chain” GFCI protection where they’ve decided if one GFCI is good…bunches should be better! And of course it won’t reset until you figure out which GFCI is the first in line (usually upstairs…in the opposite direction…at the opposite end of the house).LOL!!
All joking aside it seems that the GFCI/AFCI protection thing is getting really twisted. We’re seeing homes now where the front porch GFCI receptacle, when tested, knocks out the living room lighting since, rather than having the exterior GFCIs on a single run, they’ve wired them to the closest available protection (AFCI in the living space). Same with the back porch or patio…knocks out the dining room, etc.
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