Episode 20 - Fault Detection Devices - GFCI, AFCI, DF, AFGFCI

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  • Опубликовано: 15 сен 2024

Комментарии • 167

  • @Nebuchadnezzar18
    @Nebuchadnezzar18 5 лет назад +37

    Great video as always man, My old man was an electrician, I'm getting into the field now in my 30's while trying to go to school. Your videos are very educational. Much Appreciated

    • @ajflowz5009
      @ajflowz5009 5 лет назад

      Nebuchadnezzar what are you majoring in? I’m in the same boat. Turned 30 this month and about to re enroll into college

  • @ynictx5184
    @ynictx5184 3 года назад +3

    You and Peterson Electric ⚡️ are currently my go to channels. Coming in with the knowledge 🔥

  • @crappo8459
    @crappo8459 5 лет назад +13

    Thanks for the tutorial keep the videos coming ,I've learned more on your videos than by electricians in the field ,they can't explain what there doing clearly great job and thanks.

  • @martingo2680
    @martingo2680 3 года назад +3

    Seriously this is the best explanation I've seen. I'm no electrician but I'm changing my outlets and I was really curious about the differences. I understand them 100%, now thanks to you

  • @MRubio1978
    @MRubio1978 5 лет назад +4

    From one sparky to another much respect. Im in and i tell all the apprentices to watch your channel. I think they can definitely learn from you. You are not boring to watch. Keep it up 👊

  • @petetorres6586
    @petetorres6586 4 года назад +13

    This video has all the answers to the questions I was looking for. I enjoy your channel keep up the good work.

  • @EnglishBoyHere
    @EnglishBoyHere 6 лет назад +5

    Thank you so much for these videos, love each and everyone of them. Been in the construction trade for a while, always wanted to be a sparky. Watching your videos has given me the insight and knowledge, that I need to better myself to step into the field. Thank you again.

  • @j.maxwaddell2557
    @j.maxwaddell2557 2 года назад

    As a health professional that also loves learning about electricity for residential. Dusting, you are a gifted instructor. Thank you for the teaching videos. If I was not in my late 50's, I would add becoming a electrician as another dual career but I waited to long to begin the journey.

  • @madabz81
    @madabz81 3 года назад

    This channel the reason I got a raise

  • @elkalimba4750
    @elkalimba4750 6 лет назад +12

    Amazing video as always, ever possible to get a video on bending conduit, where one has to put a disconnect switch or just advice to those that go into residential, commercial and industrial. Just your experience and what you have seen

    • @brandonreyes5567
      @brandonreyes5567 2 года назад

      There’s a video of him showing how to run and bend conduit it’s one of his older videos though

  • @HBSuccess
    @HBSuccess 6 лет назад +1

    Oh PS - I do like your vids a lot and am not trying to be a know-it all... far from that - I’m probably old enough to be your grandfather and have been wiring houses for 40+yrs, but I still enjoy the refresher and have learned some new stuff from you - so keep it up!

  • @josefoshizzle
    @josefoshizzle 6 лет назад +4

    Just wanted to say thanks for putting out videos, I've got my first interview tomorrow for apprenticeship! Hopefully all goes well. I'm looking forward to joining the trade.

    • @ElectricianU
      @ElectricianU  6 лет назад

      Congrats!!!

    • @news_internationale2035
      @news_internationale2035 2 года назад

      @@ElectricianU
      If somebody has a 35+ year old panel with Square D Qo breakers, do you get the AFCI breaker with the pigtail or the model without?
      The bubble packs in the store have literature covering up the prongs, so it's hard to tell what's going on.

  • @Sparky-ww5re
    @Sparky-ww5re 2 года назад

    A two pole GFCI breaker that most people associate with spas and hot tubs, also formally served another useful purpose for kitchens in homes built from the late 80s until the early 2000s or so, when kitchens were required to be GFCI protection, but AFCI wasn't yet required. My sister lives in a tract house, built in 1995-96, and the kitchen counter top receptacle are fed with 12/3 NM fed from a 20 amp 2 pole GFCI breaker, each half of an outlet was fed from the black or red wire, discovered when her boyfriend began replacing the traditional outlets were originally installed, with the Decora style outlets to give the kitchen a little more updated look, even though the house was fairly new. Called me to look at the situation when the breaker refused to reset, he did not remove the tab on the hot side, creating a 240 volt short. Fun times indeed 😁

  • @joeshmoe5935
    @joeshmoe5935 4 года назад

    YOU make it very simple and easy. Thank you for explaining.

  • @garyd4419
    @garyd4419 2 года назад

    I just ran into this video and wanted to say you gave a great explanation.

  • @donreinholz8121
    @donreinholz8121 3 года назад

    Thanks for explaining the difference between the many different kinds of newer breakers. They are quite a bit more expensive but it prevents someone getting shocked or a fire it is money well spent.

  • @Linux4Ever2011
    @Linux4Ever2011 4 года назад

    Questions:
    1. Assuming I am using a normal breaker not a GFCI, what will happen if a hot touches a ground, would not that lead to breaker (turn off) too?!
    if so then what is the advantage of GFCI over a normal breaker if both keep us safe from ground fault?!
    2. About electrical arcs, the air gab between the two wire ends creates a high resistance area, then why the current is not low at that area, since current is not proportional with resistance?
    3. Since electrical arcs create a lot of current why won't the normal breaker detect the high current and (turn off)?
    Totally appreciate the videos, and looking forward for more videos that shows the actual work of electricians .. Thank you very much ^_^

  • @garbo8962
    @garbo8962 3 года назад

    Justin you should let people know how to identify what caused an AFCI breaker to trip. Could be short overload ground fault or an arc fault. We had about 42 AFCI's breakers in kids area of hospital special unit for kids that might commit suicide or have mental problems. Lazy zone mechanics would just reset AFCI breakers that oftened tripped. Took them by the hand and showed them how to id trip and left literature but they never bothered. Can't fix stupid or laziness in a lot of people. Great vid.

  • @JohnHarbot
    @JohnHarbot Год назад

    Bro was feelin the heat at the 6:54 minute marker! All it takes is one staple on romex to trigger that AFCI kill switch. Heck, even enough aluminum conduit will polarize a magnetic field enough to trip your best squareD CAFCI

  • @nman2008
    @nman2008 3 года назад

    What a great video! Thank you so much for your content! I'm starting as a brand new apprentice next week and I've been trying to soak up as much info as possible and your channels have been super helpful!

  • @mdunlap4128
    @mdunlap4128 2 года назад

    Thank you. Found your channel and have been binge watching. I am not an electrician but love learning this stuff and rules/reasons behind it. Also secretly on this one was hoping to find a simple answers to why all of 2 air compressors pop my GFIs. Happens to both heavy air compressors, in multiple locations. Maybe I will find out some day.

  • @docferringer
    @docferringer 3 года назад +1

    One year later and NEC 2020 has completed its assimilation of household circuits. Little did Dustin know...the GFCI was creeping silently towards him from behind! And GFCI is causing a lot more nuisance tripping than AFCI from what I can tell.

  • @jackleonard8660
    @jackleonard8660 3 года назад +1

    Excellent !! Thank You.

  • @charlesbiller3513
    @charlesbiller3513 2 года назад

    Thanks a bunch for all you do on here. Greatful for your channel. Helping me alot.

  • @a.t.7021
    @a.t.7021 3 года назад

    EXCELLENT!

  • @Hohmwrekker
    @Hohmwrekker 4 года назад

    Great info and explained in a way that anyone could understand.

  • @Face2Face1987
    @Face2Face1987 6 лет назад

    Another hit bro! Keep up the good work, you have a shit load of dudes like me learning a lot from you.

  • @javierzamora5781
    @javierzamora5781 6 лет назад +2

    Awsome video bro am learning so much from them keep them coming bro.

  • @pighunter5651
    @pighunter5651 5 лет назад

    👍 You are voery good at explaining electrical things. Thank you.

  • @willbedone888
    @willbedone888 2 года назад

    Outstanding video thank you for that, I will be checking out more of them, and will subscribe, thanks

  • @thelastgeneration102
    @thelastgeneration102 3 года назад

    Well done.

  • @deekneumann3943
    @deekneumann3943 2 года назад

    Best explanation I've seen!

  • @americandreamsicle1
    @americandreamsicle1 3 года назад

    Excellent episode!

  • @jesuspadron7232
    @jesuspadron7232 4 года назад

    Mi maestro!! Bad ass what a way to explain next time I am in a homeowner ima just show him your video lol

  • @mtg1074
    @mtg1074 5 лет назад +4

    Great work!
    P.S. Be easy on neck area when shaving :)

  • @markproulx1472
    @markproulx1472 3 года назад

    Super useful information. Thanks!

  • @PBS-nm1uu
    @PBS-nm1uu 4 года назад

    great presentation thanks for all the info,, love all your videos.

  • @freewoodencrosses
    @freewoodencrosses 2 года назад +1

    They have a long way to go as many people have nuisance tripping of AFCIs and the electricians cannot locate the fault. I have heard that in desperation the electrician installs a GFCI and walks away. The problem does not reoccur but the circuit is not arc fault protected. There does not seem to be good diagnostic tools available to detect the problem. My house was built in 1997 and there are no AFCIs in the box. There are millions of houses like mine. We are not protected yet.

  • @DA-rf7zj
    @DA-rf7zj 3 года назад

    Really nice explanation. Thanks.

  • @jeffbrooks7773
    @jeffbrooks7773 4 года назад

    Terrific instructional videos. Excellent presentation skills. Can you expand the instruction to include ‘how to’ wiring a GFCI receptacle as the only device in the circuit? Also a circuit containing a GFCI receptacle as well as multiple receptacles?

  • @sorenpeterson7239
    @sorenpeterson7239 3 года назад +1

    He didn’t really explain that AFCI breakers should be removed and replaced with regular breakers immediately after inspection...

  • @RonyTomo420
    @RonyTomo420 5 лет назад

    Electricity is badass man

  • @sylkelster
    @sylkelster 3 года назад

    I think the 2020 code requires GFI in all potential water locations as before including washer and dryer receptacles, kitchens, bathrooms, and outdoors. AFCI in all dwelling area circuits with some GFI overlap.

  • @Lugenfabrik
    @Lugenfabrik Год назад

    Great video thank you good sir.

  • @spindctr1
    @spindctr1 6 лет назад +3

    So how do you safely simulate series and parallel arcs when you're testing the breaker?

  • @BigmoRivera
    @BigmoRivera 2 года назад

    I Have Done Both Work At Panel I Install Some Cable For The New BMW Electric Car.GFCI/AFCI But Now I Do The Combo Wall Out Let Because People Loved To Cook With Big Hot Plates And The Breaker Never Trip So I Rewired The Cable Up To The Kitchen Iland Counter Install AFCI/GFCI Out Let Is Always Good To Check With The Cliants What Type Of Appliance They Use… They Buy The House Brand New 15 Yesrs Ago And I Notice The Kitchen Hood Vent Is Not Instal Is Missing That Is A Big Vilation It Has Gas Stove With A Broiler On On Top.😂🤷🏽‍♂️🤦🏽😉👍🏽⚡️ Great Job D. I Would Like To Hear Your Imput About The Hood Range. I Believe It Is A Valetion Code, I’m Also A G.C.

  • @joelhartlen4324
    @joelhartlen4324 3 года назад

    Your the man, thank you.

  • @shawnwaterssw
    @shawnwaterssw 6 лет назад

    Great Video. Keep them coming.

  • @miltonnegron65
    @miltonnegron65 3 года назад

    Excellent video !!!

  • @donnierobertson3088
    @donnierobertson3088 5 лет назад +1

    Good job

  • @lesterwatson8519
    @lesterwatson8519 2 года назад

    Good video! Have you ever heard the term GUCCI-protected? I did electrical work for about fifty years but have been retired for about 10 years now. I was ask about this a while back . I don’t have a clue what GUCCI-protected means I was told that it was reverse polarity potection. New one on me. As an electrician I learned something new almost every day and even though I am retired and only do pro-bono work for friends I like to learn new stuff.

    • @ElectricianU
      @ElectricianU  2 года назад

      Can't say that I have.

    • @lesterwatson8519
      @lesterwatson8519 2 года назад

      @@ElectricianU Me neither I think the guy was FOS pardon my French

  • @Inka909
    @Inka909 Год назад

    Very detail and great information thank you very much

  • @zachsilkey9404
    @zachsilkey9404 3 года назад +1

    A welder is by necessity going to arc that would suck to put a afci on your welding plug

  • @williamhaines7752
    @williamhaines7752 2 года назад

    Do these arc fault breakers. Help sort out some of the problems with aluminum wiring

  • @HBSuccess
    @HBSuccess 6 лет назад

    Not all counter outlets have to be GFCI necessarily - only those within 6’ of a sink or pot-filler. Small kitchens that is often “all” but certainly not always the case. There do have to be TWO dedicated 20a counter circuits - so a lot of Sparkys will wire one as the GFCI for wet areas and the other “dry”. Finally AFCI is now required in kitchens as of the 2014 and 2017 NEC - but a LOT of locales are operating on the 2011 code and will continue to. So check before buying a bunch of $50 CF breakers.

  • @sandramartin1017
    @sandramartin1017 4 года назад

    Dustin, sorry I called you Justin... Keep the videos coming they are great!

  • @MCMXI1
    @MCMXI1 5 лет назад

    Outstanding vid and great channel...thanks

  • @onecrown16
    @onecrown16 2 года назад

    Thank you

  • @jdshaw83
    @jdshaw83 4 года назад +1

    I have a house built in the 50s and there are a number of ungrounded outlets. I've heard you can put a GFCI outlet at the front of the run to protect it. Is that true? Could you also replace the breaker with a GFCI breaker? Other suggestions?

    • @kc9scott
      @kc9scott 3 года назад +2

      Yes and Yes.

  • @surferdude642
    @surferdude642 3 года назад +1

    If you have an DF receptacle as the first device in a circuit and that circuit covers the bathroom and/or kitchen does that mean that no DF, AFCI, or GFCI receptacles should be used downstream?

  • @dadtothebone4859
    @dadtothebone4859 6 лет назад +1

    Yo you shaved the beard looks good homie, your vids I always learn a lot.

  • @nograves456
    @nograves456 4 года назад

    Much love bro

  • @r.pizzle4639
    @r.pizzle4639 5 лет назад +1

    Still love the old intro song vs new
    Does the DF breaker incorporate series and parallel fault conditions, as well as gfi?

  • @skimbulshanks
    @skimbulshanks Год назад

    I thought the gfci was more to protect you from a neutral wire to ground short. The thinking is, that in a bad moment where you are a better path to ground than the ground wire, thus taking the neutral current, it protects you by tripping. A short to hot is obvious.

  • @13ivang
    @13ivang 6 лет назад +1

    Would really love a video on transformers. I’ve gone through ur videos in about a day and let me tell you. You are made for teaching this stuff man. I learned this stuff in school already but you made some stuff so easy to understand. And would love it if you could come up with something for transformers. Appreciate all the videos man.

  • @edmondenterprisesgrouphold3782
    @edmondenterprisesgrouphold3782 3 года назад

    Thank you for he information

  • @bruceboyles1895
    @bruceboyles1895 2 года назад

    Dustin: I have a question for you, my house is about 5 + years old. It has GFCI in the kitchen, bathrooms & garage but in the bedrooms have AFCI only. I guess at the time there was no (combo ). Not too long I had a short in one bedroom, this tripped the circuit breaker but not the AFCI. I though the AFCI was to trip first. I figured they were bad so replaced both of them w/ GFCI/AFCI. I created an ark by putting the space heater plug part way into the receptacle as to cause an interracial ark but the didn't trip it either. HELP me understand. Love your channel Bruce.

  • @bayswhc9329
    @bayswhc9329 4 года назад

    Thank you!

  • @jayrodriguez8571
    @jayrodriguez8571 4 года назад +1

    I didn’t see a video (19) after (18) and soon as I seen it I was like “wtf! Who is that! What did you do with Dustin!” 😂😂😂

  • @DFVIDZHipHopLyrics
    @DFVIDZHipHopLyrics 3 года назад

    That intro beat is fire

  • @rahj1365
    @rahj1365 4 года назад

    You should consider part time teaching!! Excellent videos mate!

  • @lancerudy9934
    @lancerudy9934 3 года назад

    Nice video. Very good to know

  • @evertabora2652
    @evertabora2652 3 года назад

    Gracias

  • @ronbonick4265
    @ronbonick4265 5 лет назад

    They keep make technology better and better -and safety increases - But prices of insurance sure doesn't go down

  • @doughobkirk2972
    @doughobkirk2972 3 года назад

    Excellent details. Is it smart to replace 1988 breakers with newer dual breakers? If so, since they cost about $50, just do "wet" and workshop areas?

  • @jefralston
    @jefralston 2 года назад

    I love your videos. You are a terrific teacher. My question is about AFCI breakers making a buzzing sound. I have AFCI breakers installed in my panel for each of the bedrooms in my house. Occasionally when I am in the garage area where the load panel is, I hear a random buzzing sound coming from the panel. It isn't all the time and it only last for a second or less. I assume the noise is from the AFCI's. Is this normal for AFCI breakers to make these noises on occasion?

  • @Mikechill5
    @Mikechill5 3 года назад

    you explain it very well but I'm still lost. lol. granted this is all pretty new to me only had an overview in building maintenance class in tradeschool

  • @shahkhan4805
    @shahkhan4805 4 года назад +10

    After Episode 18 there is no Episode 19 and NO BEARD!! What's going on?

  • @sailingeden9866
    @sailingeden9866 3 года назад

    Great video

  • @buddhalovechild
    @buddhalovechild 2 года назад

    Thanks again. I am not an electrician. To be clear are you saying not to put a breaker with arc fault protection on an induction motor circuit

  • @javierferrer4634
    @javierferrer4634 5 лет назад

    Nice video! Very well explained thank you! Little question how you bypass industrial grease pump with timing relay on it?

  • @pzeller1
    @pzeller1 6 лет назад

    Prediction/Idea: Regarding nuisance faults of AFCI/CAFCI breakers due to motors, etc, creating temporary arcs. Rather than not use AFCI on these outlets, either have ones with a slower arc response time, or, since they are becoming increasingly digital, a button to override the function but only for xx minutes.
    If you provide a button to override AFCI which didn't time out, idiots would simply leave them in override indefinitely, defeating the purpose of the AFCI.

    • @ElectricianU
      @ElectricianU  6 лет назад

      I agree - on startup is normally where the high-arc sensitivity exists. I know manufacturers are working on this issue as we speak. Overload and over-current protection should be sufficient protection for startup current levels, only after the current stabilizes should there be a need for arc-detection imo

  • @demetriotizcareno2995
    @demetriotizcareno2995 5 лет назад

    gracias man That's what I do here in California

  • @RussShawTV
    @RussShawTV 2 года назад

    When testing, I tripped the breaker and turn it back on and see the Arc Fault light come on for a few seconds. Some other circuits Siemens breakers don't have the Arc Fault light come on. Should I be concerned it the Arc Light stays on after testing for a few seconds?

  • @MrAquinas1
    @MrAquinas1 2 года назад

    Why doesn't the Seimens GFCI breaker come with a built in pigtail? It seems to depend on a ground connection from the hooking end of the snap on tab. Does this mean the paint needs to be stripped in the panel box to make the connection?

  • @alecburlakoff8784
    @alecburlakoff8784 2 года назад

    Hey man! Big fan of your stuff. Quick question. Why use a AFCI over a CAFCI? I feel like CAFCI breakers is something that shall be used more so than an AFCI

    • @ElectricianU
      @ElectricianU  2 года назад +1

      Some AHJs only require afcis for specific devices and only require gfcis for specific devices. Combos are usually cost prohibitive for a lot of folks. But buy once cry once.

  • @jjr8975
    @jjr8975 6 лет назад +2

    When are you gonna do one on conduit bending?

  • @nathanpautler691
    @nathanpautler691 5 лет назад

    Love all your videos! I have a question about DF protection on a kitchen counter-top circuit. Adding two circuits to a GE panel, no half-size fault protection breaker available from GE, so to save space in my panel I was going to go with a 20amp half-size breaker (THQP120) then protect the branch with a dual function receptacle at the first outlet. I was told that this would require me to protect the first cable run with metal clad or conduit. However, I can't seem to find any code that states this requirement. The home run to the first box in both cases is ran with NM cable (they are continuous). Can you provide me with any insight on this requirement? Much appreciated!

  • @joemartinez7619
    @joemartinez7619 4 года назад

    Thanks

  • @brightsideelectricalservic7896
    @brightsideelectricalservic7896 4 года назад

    Still Surfing my way through..
    To be like you 🙂..

  • @stephencarrico2982
    @stephencarrico2982 6 лет назад

    Quick question for you. Since 210.12 has 6 options for possible ways of AFCI protection which one do you normally use? I'm going to be an E.C soon and I pretty much work as a contractor(3rd year apprentice) I personally see the 4th option best for cost wise.

  • @dakotbeastj
    @dakotbeastj 3 года назад

    So, correct me if I'm wrong, but if it is a series arc your load could potentially still work, but if it is a parallel arc your load will not work?

  • @christopherperez6126
    @christopherperez6126 3 года назад

    Okay, so I'm 17 can do a lot residential wise and have never used these breakers(never had a pigtail coming out the breaker) and why, or are they, not more common? like why are normal (only takes a hot) even still sold then if these are way safer? also what trips a normal break? short circuits right? so wouldnt a parallel arc trip a normal breaker? you talked about resistance to detect these but wouldnt the parallel arc draw a massive amount of energy like a short circuit or is that 'countered' by the resistance of, say like, the air?

  • @davidadame1313
    @davidadame1313 6 лет назад

    thanks for the video! does alot of this scream money to you? it does to me. I dont think half of the things that they make us put AFCI on actually need it but I do notice that the breaker costs 2-3x more

  • @beaugalbraith3242
    @beaugalbraith3242 6 лет назад

    So will GFCI also trip if current has increased through the load? Along those lines, is it theoretically possible to have the primary GFCI outlet lose a small amount of current via ground fault but then gain a small amount of current from a downstream protected outlet, thus offsetting and not tripping the GFCI outlet?

  • @that_guy_right_there_2945
    @that_guy_right_there_2945 6 лет назад +1

    I have been binge watching several videos and you are awesome! As a master electrician what is your opinion regarding Wago Connectors. Seen a lot of people use them but what are the pros and cons you have encounter vs using wire nuts.

    • @HBSuccess
      @HBSuccess 6 лет назад +1

      My .02 - just like sharkbite connectors for plumbers - they have a place in your arsenal. They are an extremely handy alternative in places like junction boxes where you may need to add a wire for some reason or take something apart later. There have been plenty of tests on them and in extreme over-current situations they do fail - but it’s like a 100a sustained load on a 14ga wire - and the conductors failed before the connector in those cases so O do not worry about durability. Now the bad part - they are no faster to install than a wirenut, they take up as much space or more in the box, and they are exponentially more expensive so I’m not going to replace wirenuts on large jobs any time soon.

  • @ken_9359
    @ken_9359 6 лет назад

    If someone has no electrical experience like me but wants to get a C-7 Low Voltage license to do Access Control type work. What would be the best way about going about it. Should I buy test materials and study books just for the C-7 license or should I take the 3 basic Electrician's courses at a trade school. Any advice will be helpful, thanks!

  • @juanramirez3679
    @juanramirez3679 2 года назад

    Se puede usar el dual para cualquier circuito de una casa?....y se puede combinar en un circuito un interruptor afci con un tomacorriente gfci?....... y por ultimo en un interruptor gfci de 2 polos(220v) la corriente que pasa por una linea es la misma que a otra linea, y el neutro que detecta o que mide?

  • @mrstanskaggs1
    @mrstanskaggs1 Год назад

    I have a weird issue that I am looking for a solution for. I have a microwave above my stove on one dedicated normal 20A circuit breaker, when the microwave runs, it pops a AFCI breaker on only one of my bedrooms most of the time. The microwave circuit does not have an issue in any way or time, but the bedroom pops most of the time the microwave runs. The circuitry has not been modified at any time, and the bedroom has a computer as well as the internet via cable modem. The bedroom has no issues at any time except when the microwave turns on. I have checked the conductors in the outlets both in the microwave and bedroom jacks. I will be looking at the neutral and ground bars in the box tomorrow.
    Do you have any advice on this situation? I checked the phases these two breakers are on and they are both on the A circuit (Microwave in on the 5th slot left and the bedroom is on the 9th slot right side).
    Hoping you might have an idea to check on..
    thanks!
    Stan Skaggs

  • @sandramartin1017
    @sandramartin1017 4 года назад

    I have two questions: First can you use a DF circuit breaker for all circuits in your house? Second, if you do can you still use a GFCI recptical on the same circuit? Someone told me that there would not work together.

    • @kc9scott
      @kc9scott 3 года назад

      (1) Pretty much any 120V circuit is fair game for it. The only exception I know of would be for multiwire branch circuit(s). That’s when 2 branch circuits share a neutral wire and have their 2 hot wires on opposite phases. In that case you don’t have the needed access to each individual circuit’s neutral within the panel, which would rule out any usage of a GFCI/AFCI/DF breaker unless/until you split apart the wiring for those circuits. (2) I believe, yes, a GFCI receptacle should be perfectly compatible with also having a GFCI/AFCI/DF breaker for the circuit. Never tried it myself though. The only issue I might wonder about is if you press “test” on the recepticle, could it create a real enough ground fault to also (annoyingly) trip the breaker? I don’t know that detail.