Questions tagged [gfci]

Ground Fault Circuit Interrupter(GFCI). Sometimes known as a GFI, or a residual-current device (RCD or RCCB). Can refer to receptacles as well as circuit breakers. They detect a leak in current, or an imbalance between the current on the hot and neutral wires. This is used to prevent electrical shock. Use with the [electrical] tag

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47 views

GFCI Trips when Grounds Touch

I have a GFCI located in my garage which feeds into my bathroom and then goes to an external junction box and finally underground to my deck. Upon doing some routine testing, I noticed by deck ...
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Switched a outdoor gfci for a working one but now other components in the house don't work?

I did some minor electrical work for a friend as I have some minor electrical knowledge myself, and he called me today saying that the heated floor and towel warmers are not working since I swapped ...
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Can I run hot wires for both GFCI-protected and non-protected branches in one conduit?

I have an new incoming circuit at box in garage that is not GFCI protected but I want to add a GFCI at that point (garage) and then add 2 more GFCI protected duplex outlets in garage downstream off ...
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435 views

15 amp line connects to -> 20 amp line -> 20 amp GFCI -> 15 amp outlet

Regular 15amp non-GFCI breaker, first circuit stop is outdoor 15amp GFCI outlet, second stop is bathroom 20amp GFCI outlet, last stop is bathroom plain 15amp outlet. Everything is correctly wired. 15a ...
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gcfi tiled over during bath remodel

I think my contractor may have covered up the GFCI behind the tile in a bathroom remodel several years ago. It has been fine all this time, but recently my wife was dying her hair and popped the ...
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Tester shows Circuit wired correctly but GFCI Trips under smallest load

We added an outdoor fireplace and trying to wire it up. I am repurposing an old generator connection on the outside of the house. Here is the current setup 10-3 wire from panel to the outside ...
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255 views

Any reason *not* to put electric oven on GFCI breaker?

I want to tap my electric oven's existing circuit to add a NEMA 6-15 outlet in my kitchen for a 240v kettle (the oven is rated at 21 amps and the breaker is 40 amps, so I think I should be OK adding ...
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97 views

I'm getting a fake short on my fuse tripping GFCI

I recently went to change an outlet to a GFCI (It was the first in the line) After I installed it (as I have done dozens of times) and It kept tripping. I replaced the outlet thinking it was faulty, ...
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How do I force a defrost cycle on my refrigerator?

My Kenmore 596.51679100 side by side fridge is tripping the dedicated GFCI circuit in my garage that it's plugged into and I suspect it's the defrost heater but I need to test this. As far as I can ...
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744 views

Can I wire additional circuits off of GFCI this way?

Currently, I have a GFCI outlet that has two more outlets down the line as shown in this diagram. I am moving around some circuits and I need to temporarily hook up 3 additional outlets that are ...
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GFCI seding low voltage to downstream devices

We just purchased a cabin and suddenly several lights stopped working. Initially I thought it was just the light over the kitchen sink. So I replaced the bulb and it still didn't work. I then checked ...
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Can i install a receptacle?

im wanting to install a receptacle in my living room, im no expert but im always willing to learn. there are white, red and black wires. could you help me with this project. i would greatly appreciate ...
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Can a GFCI power a light and a switch in this order?

I made some repairs in a bathroom which included pulling an old outlet, switch, and the light. I'm coming back now to replace them with updated versions (gfci, switch, light) and scratching my head on ...
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Why is GFCI Receptacle Tripping From Downstream Fluorescent LIght on Switch?

I recently ran power to a small shed in my backyard. I extended a 15amp circuit that was powering only a gate motor. The #12 wire enters the shed and transitions to 14/2 Romex at a disconnect. The ...
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A GFCI controls all the lights in the bathroom

Brand new house, when I test the GFCI in the bathroom, all the lights and fan go off. When I reset the GFCI they all come back on. Is that normal?
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GFCI has power but outlet doesnt work

Im installing an exterior gfci. It comes from the breaker to a juntion box, to the exterior box. Inside i have a 20amp single pole switch controlling the gfci. Its supposed to be for running power ...
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GFCI connected with 2-black wires (both hot) and 2-white wires. Connected to line and load. GFCI does not work

C/B connected to both bathrooms’ outlets. GFCI not working. Tried to replace, but line and load connections are both incoming hot wires, even when disconnected from GFCI. How do I get this to work ...
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What is the purpose of a ground in a GFCI outlet?

What is the purpose of a ground in a GFCI outlet since the GFCI is just measuring the current between HOT and Neutral? Does it add any functionality or safety if it is grounded? I've seen it ...
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168 views

Duplex outlets in series AND parallel after GFCI

I am planning to add some devices/receptacles to a 20amp circuit in my house. The following image shows the original circuit and my proposed additions. I'm specifically concerned about my plan for ...
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392 views

Metal box grounding question GFCI outlet

What is this wire for? The picture shows a wire connected to the grounding screw and back to the outlet. Is this commonly done to get a connection to the metal box? My outlet tester shows this outlet ...
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53 views

Add an outlet to this switch?

I have an exposed conduit switch box on my front porch that controls a spotlight. I would like to add a gfci outlet to the switch box (swapping the switch box for a double box thst is weatherproof) ...
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179 views

15 amp gfci on 30 amp breakers

I have 2 space heaters at opposite sides of my bathroom walls (facing into guest rooms). There is a wire that is easily accessible going between them thru the bathroom wall, which I have opened up ...
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155 views

Will a GFCI-protected 15A circuit meet light power tool needs in a shed?

I want to run electric from my house to shed, which is 23 feet from my house. I was going to run 12/2 wire from the outside gfci underground to the shed. I plan on having 2 lights and 4 outlets in the ...
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122 views

2 independent GFCI (or 2-pole GFCI) outlet in 1-gang box. Does that exist?

I have a 1-gang duplex outlet under the sink in my kitchen. The two outlets are on separate phases of a single MWBC circuit. One of them powers the garbage disposal, and is controlled by a switch. The ...
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50 amp GFCI Tripping randomly

My 50 amp GFCI Breaker tripped periodically so I disconnected the load wires from the lugs and turned it back on And after about a minute it tripped again. I then changed the breaker and it tripped ...
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RPC trips separate GFCI circuits on start up. Why?

I have four 20A GFCI breakers each handling a string of outlets on each wall in my garage shop. I also have an 100A circuit for a 20HP RPC (Rotary Phase Converter). When I start the RPC it trips two ...
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172 views

Test button on GFCI breaker does nothing?

I've installed a 240V 50 A GFCI breaker for a to-be hot tub in a subpanel and just done a preliminary test. If I power it on, a non-contact voltage tester shows its load cable is live. However the ...
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77 views

Is this how I add GFCI and Regular Outlet to existing Multi Wire Branch Circuit, 20amp? 12/3 to 12/2 wiring with GFCI

I have a multi wire branch circuit using two 20amp breakers and a single run of 12/3 wire to a single split outlet in our laundry room. The top outlet (black) powers the gas dryer, the bottom outlet ...
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56 views

Is it possible/recommended to use AFCI/GFCI breakers when replacing subpanel?

I'm replacing my old subpanel. (It was from Federal Pacific.) I'm not rewiring my home. And I understand that I'm not required to use AFCI/GFCI breakers. Is it possible to use AFCI/GFCI breakers with ...
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How to install a GFCI?

I would like to replace a regular plug with a GFCI plug. The current plug has: Ground (green in picture) White Black Red (connected on the same side than the Black with broken tap) The breaker is &...
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62 views

Is it required to use AFCI/GFCI breaker when replacing subpanel?

I'm replacing my subpanel at home. My jurisdiction adopts NEC 2017. When replacing a subpanel, is it required to have CAFCI on all circuit breakers for all 120V circuits? When replacing a subpanel, ...
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218 views

Two hots, one shared neutral, can it work with plug on neutral GFCI/AFCI breakers?

Situation: A 1950s house with some equally old wiring, and some remaining EMT wiring that is being put onto a new QO main svc panel (QO142M200PCAFVP). This is a plug-on-neutral panel. I believe per ...
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After installing GFCI outlet in bathroom, why won't my light fixture turn on?

I recently installed an updated light fixture in my bathroom and swapped a standard outlet for a GFCI. Both are seemingly running through a single light switch. Once everything was installed the light ...
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144 views

GFCI tester is tripping 15A breaker in panel; outlets on circuit do not appear to be GFCI outlets - is this a problem?

Level of electrical wiring knowledge: Very basic, if that Problem: 15A single-pole breaker in panel randomly trips - has been doing so since buying house in 2009 (house built in 1987) Trouble shooting ...
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145 views

Is it possible to wire 2 GFCI receptacles on 2 circuits with 12/3 wire shared neutral?

I am planning to run a few needed 20amp outdoor receptacles (and therefore want GFCI). My plan was to run 12/3 wire from 2 separate circuits in the panel to a double gang weatherproof box with 2 gfci ...
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66 views

What, if any, circuit elements are disallowed downstream of a GFCI?

This was inspired by the "reverse" question . Is there any switch, protection element, (even a new breaker box) which is not allowed to be installed downstream of a GFCI?
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Why did my GFCI by my kitchen sink burn up?

My wife and I were sitting at the kitchen table and heard about 10 seconds of buzzing, then smoke came out of the GFCI next to the kitchen sink. Nothing was plugged into the outlet, and the only ...
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121 views

Refrigerator on GFCI is tripping other AFCI breakers in the house

This is going to sound really weird, but it has been going on for 6 years and the electricians that wired our house spent multiple days trying to figure it out before we found it was definitely the ...
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267 views

GFCI outlet trips overnight. The breaker indicates there is ground fault. Outlet tester shows no lights (no power?)

I have a GFCI tripping problem. My garbage disposal is connected to an outlet protected by a GFCI breaker. I am still able to run the disposal several times within one or two hours after I reset the ...
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539 views

Is my plan for an AC disconnect with GFCI appropriate?

My new AC system will include two motor loads: Central AC (Rheem RA1642): 208/230-1-60, 40A MOCP, 25A MCA, 20.2A rated load Minisplit (Fujitsu 12RLFW1): 208/230-1-60, 20A MOCP, 12A MCA, 5.9A rated ...
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38 views

230v GFCI spa with 115v spur

Currently I have: Main breaker panel Conduit to outdoor socket, GFCI protected Onwards connection to next outdoor socket I'm having a hot tub, currently 115v plugged into the GFCI socket, upgraded ...
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95 views

How do I install a GFCI in a box with two 2-wire cables and one 3-wire cable?

I need some help please. I'm replacing a standard receptacle with GFCI but the instructions that came with the GFCI doesn't explain how to make the connections when when there is a 3-wire cable. ...
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153 views

How do I intall GFCI breaker if wire for outlets is 12/3 using two breakers?

I have kitchen outlets that have one breaker powering the top outlets, and a separate breaker powering the bottom outlets with the tab broke off on each outlet. There are a total of 7 different ...
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69 views

3-Way switch on single pole--convert to combination?

I have a 3-way switch (top and bottom of stairs) to control an overhead light. The whole landing area at the top doesn't have an outlet available anywhere, so my ex-father-in-law (a DIY type who has ...
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44 views

Double Pole GFCI - Pool Rewire - 120V trips GFCI

My pool system has a 3-wire connection to the main breaker box: 2 Hot and Ground. The wires go from the main panel to a 2 pole GFCI (pig tail not connected), from there to the timer and the pump. In ...
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325 views

What is the difference between a GFCI ungrounded circuit and a grounded circuit?

From reading this article it seems like an ungrounded 3-pronged outlet can be made safe by installing a gfci downstream in the circuit. Although the technique of installing GFCI devices in an ...
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127 views

GFCI outlet reading between 80 and 640 volts on multimeter

I am adding a circuit to feed off a live GFCI outlet. At the outlet I read 118V in both receptacles and the reading is stable. With the new cable, I connected the neutral white to the silver screw ...
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209 views

Converting electric receptacle with one hot and two neutral wires to GFCI

I'm trying to replace my washing machine receptacle with a GFCI one. The home was build in the early 70's and there is no ground wire. The receptacle had two neutral wires and one hot wire. I found ...
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130 views

Is a noisy / humming GFCI breaker OK?

I noticed a slight humming noise coming from a subpanel in my house. Narrowed it down to a single GFCI breaker. When I press the test button on this breaker and it trips to off, the sound is gone. Its ...
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306 views

can i use a 15 amp GFCI outlet in a 20 amp circuit?

I am installing two GFCI outlets in an outdoor Gazebo, can I use a 15 amp GFCI receptacle if the circuit is 20 amps?

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