Head Scratcher.

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lbmcse

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I am an Inside Journeyman Wireman, or used to be until my folks called me back to the classroom. Now I teach apprentices for a 5 year program and see that they top out; or don't.

I have experience in troubleshooting, worked at power plants, nukes, etc. I consider myself a reasonably intelligent individual.

My back patio GFCI stopped working suddenly. I need this receptacle because I have a pellet smoker, and make bacon, baby backs, briskets and beef back ribs. I NEED this receptacle! :)

No event I can think of triggered this. The house is new construction, 5 years old.

At the panel a breaker marked "patio area." Seems to be the feed. When off, neither the kitchen lights or receptacles, the lights above the back patio (hi-hats in stucco) outdoors, nor the receptacle in question work. This makes sense, as the kitchen is adjacent to the outdoor patio area. Again when the breaker is off, nothing in this paragraph is energized. The very first thing I did was confirm that all breakers are "ON," and I even tested between hot and neutral for every breaker in my 200A panel. Most every non-double-pole breaker is either GFCI or AFCI, so they each have a hot and neutral screw. Every last breaker gives 120 phase to neutral, and phase to ground. NO BREAKER IN THE PANEL IS TRIPPED OR OFF.

So: did my indoor due-diligence first. The 2-gang box that feeds the patio lights, kitchen lights and receptacles, and a non-used fan box outside above the patio, contains the only wire that gives 120 with "patio area" breaker on, and zero when the breaker is off.

So when the "patio area" breaker is on, everything works, BUT not the patio area receptacle. (Kitchen lights, kitchen receptacles, and outdoor patio lights). So up into the attic I go. I had my wife tug on the "patio area" romex inside the panel and I identified that romex in the attic all the way down to the back of my house, putting a duct tape flag every 5 or so feet so I can see it from the next point with all that batt insulation. It seems to descend ONLY to the outdoor patio receptacle, and not anywhere else, though there is a possibility that after it descends it branches off to the 2-gang box mentioned above, but with the 1/4" width of that chase, I doubt it. That's the first part that doesn't make much sense.

In the attic, a contactless tester on the romex coming off the breaker marked "Patio area" is live above the panel, (I pulled to romex far from the other wires), but it's dead 40' away where it descends and disappears. OK, so maybe a staple that pierced the romex a bit had some time to develop rust/corrosion to short together a hot and a neutral. I've seen this before, but in my house, no breaker trips! All loads EXCEPT the patio receptacle work just fine, and when that breaker is turned off, and the kitchen lights and receptacles and patio lights do not work, and everything rings out properly. Again, when it's on, everything works fine. ?????? Except the patio receptacle.

I'm trying best to keep this as short as possible. I traced with continuity down in the air-conditioned portion of the house; (hot to neutral, and neutral to ground) every load with the breaker off coming from the "home run" box. I also established with no doubt that there are no shorts anywhere. The kitchen switch is good, all receptacles are good, the lights outside and kitchen lights are good, all work fine when that "patio area" breaker is on, and it all doesn't work when it's off. I plugged an extension cord into the receptacle outside and used the female end inside to check for continuity. There is none.

I assumed (at this point I'm spitballing) it might be a break in the wiring in the very narrow chase between the outside stucco and inside drywall descending to the receptacle in question (from attic to ground level).

After testing no voltage present; I remove the outside receptacle and put the hot and neutral under a wirenut. I determ the hot and neutral off the "patio area" breaker, but get no ring. OK. I wirenut the hot and neutral just determ'd in the panel, and check for continuity between the hot and neutral wire at the receptacle outside. No ringy.

I put test leads inside all receptacles that don't work, and the hot and neutral to every switch leg from the box I'm calling the home run box, and with the hot and neutral bugged together in the main panel, no ringy anywhere. At this point I'm considering becoming a doctor. For reasons I don't have to explain, it just doesn't make sense.

Anyways, figured I'd bounce this off some JWs, and $10 to anyone who tells me what I'm missing! :)

Thanks for reading. Sorry about the lengthiness.
 
A few things I would try:

1. Could it the outside recept be on the load side of a GFCI or a switch somewhere?
2. Test for continuity at the outside recep's neutral and ground to the house's neutral and ground. Sometimes knowing which ones have continuity provides some insight.


In the attic, a contactless tester on the romex coming off the breaker marked "Patio area" is live above the panel, (I pulled to romex far from the other wires), but it's dead 40' away where it descends and disappears.

Well seems like that is your problem, if that is the correct wire. I dont fully understand where you do and dont have access and voltage to this wire....
 
A few things I would try:

1. Could it the outside recept be on the load side of a GFCI or a switch somewhere?
2. Test for continuity at the outside recep's neutral and ground to the house's neutral and ground. Sometimes knowing which ones have continuity provides some insight.




Well seems like that is your problem, if that is the correct wire. I dont fully understand where you do and dont have access and voltage to this wire....

That should say, "I pulled THE romex far from the other romex runs up there to be sure I wasn't getting voltage off a nearby wire."

To answer your first question, the only GFCI receptacle I have in the house with a "test/reset" button is in the garage. All other required GFCIs are on a GFCI breaker, which are all ON.

I'll try the second suggestion.

BTW, I have access to copper from the romex in question only at the multi-gang box indoors, and at the receptacle outside.

Additionally, I forgot to mention, when I brought the extension cord inside from the outdoor receptacle, I checked hot, neutral and ground to the multi-gang box that supposedly feeds it. No ringy.


Thank you!
 
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My back patio GFCI stopped working suddenly. I need this receptacle because I have a pellet smoker, and make bacon, baby backs, briskets and beef back ribs. I NEED this receptacle! :)
Invite me to dinner and I'll troubleshoot free. ;) You do have to get me there, though, wherever you are.


If the dead receptacle is a GFCI receptacle, its incoming wires should be hot (and grounded) as usual. You should use a solenoid tester rather than a high-impedance voltmeter for this kind of troubleshooting.

I would plug an extension cord into a known-properly-wired receptacle (preferably non-AFCI/GFCI protected) and check the dead feed for hot against the cord's neutral and grounded neutral against the cord's hot.

If one is correct and one is not, you have an open connection somewhere. If they're both incorrect (i.e., floating) then you have a bad device in line. All other exterior receptacles are working, right?
 
A few things I would try:

1. Could it the outside recept be on the load side of a GFCI or a switch somewhere?..

Yes, if garage GFCI works fine, and plug isn't switch controlled, I'd arrange extra credit to the student who can trace problem to source, with main locked out (Off).

Then I'd offer more extra credit to the students willing to install needed AFCI & GFCI protection in rest of the house.

Then I would charge all the material to the School for using your house as an educational laboratory.
 
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SOLVED!

SOLVED!

Electrofelon. You are my man! PM me your address and I will submit the $10 as promised. :D

Not in a million years did I think there was only 1 receptacle, 50' away, on the load side of the ONLY "test/reset" GFCI labeled receptacle in the entire house. It had tripped when I unplugged my lawnmower battery charger and placed it (the male charging tip) on my steel reloading bench. (a small DC wall wort, but 4-6 mA is all it takes).

Once I pressed reset, problem solved.

So lesson learned. Don't think for a second that the breaker labeled "patio area" includes the GFCI on the load side of the one in the garage.

This will be a quiz question on a future assessment for my 5th years.

Thank you. I am very appreciative.
 
Thanks everyone else.

Thanks everyone else.

In my haste to report my results, I didn't read that a few others had replied. Thanks all. So simple.

I even mentioned Occam's Razor to my wife.

It's never "something stupid" while you're troubleshooting.

I tell my students pretty often that our brain is first to blame the gear, when the majority of the time the gear is doing precisely what it's designed to.

Great outcome.
 
Electrofelon. You are my man! PM me your address and I will submit the $10 as promised. :D

Not in a million years did I think there was only 1 receptacle, 50' away, on the load side of the ONLY "test/reset" GFCI labeled receptacle in the entire house. It had tripped when I unplugged my lawnmower battery charger and placed it (the male charging tip) on my steel reloading bench. (a small DC wall wort, but 4-6 mA is all it takes).

Once I pressed reset, problem solved.

So lesson learned. Don't think for a second that the breaker labeled "patio area" includes the GFCI on the load side of the one in the garage.

This will be a quiz question on a future assessment for my 5th years.

Thank you. I am very appreciative.

Great! Glad to help. Tell you what: throw the $10 in a tip jar at the coffee shop or something where they arent making a great wage, or the salvation army bin next Christmas. So now that its fixed, what time is dinner?? ;)
 
LOL. Dinner was at 2:30pm, so I could devote the rest of the damned day to getting this fixed. I think when I return the 1900 box, bag of romex button connectors, blank lid, and 50' of 14-2 to Lowes, I'll take the $34 and get my car washed by some H.S. baseball team at a local gas station, providing they're females, of course. I might be an old electrical instructor, but I'm still an electrician, damn it.

Thanks again.
 
Home run? How so if you have lights and stuff + a recept that are hot from one ocpd? Bad tap is my guess.

Pull the CCC's off the panel and put a toner on it, see how far away the tone can be detected.

Sounds like one of the CCC's are broken.

Is there a buried box somewhere where maybe one CCC lost contact with the BC in a wirecap?

Is there any voltage reading between L and gnd or N and gnd?

Replace the receptacle.
 
Home run? How so if you have lights and stuff + a recept that are hot from one ocpd? Bad tap is my guess.

Pull the CCC's off the panel and put a toner on it, see how far away the tone can be detected.

Sounds like one of the CCC's are broken.

Is there a buried box somewhere where maybe one CCC lost contact with the BC in a wirecap?

Is there any voltage reading between L and gnd or N and gnd?

Replace the receptacle.

Solved! See post #7
 
Learned a long time ago that when wires at a receptacle don't have continuity between neutral and ground (especially if in a location where GFCI protection is required and you don't have a GFCI at that location) that first thing to look for is a tripped GFCI - and it can be anywhere. GFCI receptacles open both hot and neutral when they trip, so continuity between N & G back at main bonding jumper is lost once it trips.

Spent unnecessary time trying to figure out what was going on a couple times then finally found tripped GFCI. One time was common to put outside receptacles on load side of bathroom receptacles - last place you might think to look to reset:(.
 
Bathrooms and outsides were the only places required for a long time and the bath counter was a handy area. Who wanted to spend an extra $20 when one would do?

I looked for a problem in my own house after Xmas. Eventually I remembered that GFCI in the basement. MDSW had managed to push the test button when she put Xmas stuff away.
 
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