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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Where should I NOT use a GFCI or AFCI?

There is a lot of information out there about the benefits of GFCI and AFCI and the places where they must or should be used. But are there any circumstances where you're better off without them? If I ...
dlf's user avatar
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30 votes
9 answers
309k views

How do I install a GFCI receptacle with two hot wires and common neutral?

In my kitchen, I want to replace a regular 120V receptacle with a GFCI-protected receptacle. The instructions describe what to do with a regular 2-wire + ground feed, with and without daisy chaining ...
Matt Fox's user avatar
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28 votes
3 answers
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Now I realize I used too many GFCI outlets. How can I reclaim them?

Yeah, so the building inspector redflagged a bunch of outlets for not being GFCI. Before I understood how the LOAD terminals work, I just replaced every single one with a GFCI outlet. Most had a ...
Harper - Reinstate Monica's user avatar
24 votes
4 answers
359k views

How do I properly wire GFCI outlets in parallel?

I have two countertop outlets in my kitchen that I am in the process of replacing with new, GFCI-protected outlets. These two outlets are on a circuit together, and they are the only loads on that ...
Drew Spickes's user avatar
23 votes
3 answers
2k views

Replacing 2-prong outlets in basement - existing wiring has two hot wires, one neutral?

I'm replacing the two-pronged outlets in my basement with 3-pronged grounded outlets in the United States (Illinois). All the wiring is in metal conduit with metal conduit boxes, which are grounded ...
David's user avatar
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21 votes
4 answers
287k views

Which Kitchen outlets do NOT need GFCI?

I have the 2 circuits in the kitchen with GFCI outlets, but I'm not quite sure which other ones do NOT need GFCI. Other circuits in the kitchen include Microwave, Fridge, and Dishwasher. It makes ...
rcav8r's user avatar
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20 votes
9 answers
27k views

I live in an older home without ground wiring. Is it safe to install 3-prong GFCI with only a hot and neutral?

I live in an older home that doesn't have any ground wiring. Is it safe to just install 3-prong GFCI outlets and use devices and appliances that expect a ground wire connection when I just have the ...
Dan's user avatar
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20 votes
10 answers
274k views

Why would a GFCI trip on refrigerator circuit?

My refrigerator is tripping the GFCI on the socket into which it is plugged. Searching about this topic seems to indicate that this is a reasonably common complaint. However, I can't find any ...
hoc_age's user avatar
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18 votes
4 answers
126k views

When to use holes instead of side terminals to wire an outlet

This question comes from Shirlock's comment on this GFCI wiring question. When and why should you use the holes on the back of an outlet rather than the side terminals? I always assumed the holes on ...
BMitch's user avatar
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17 votes
5 answers
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If I install a GFCI on the first outlet in a circuit will the other receptacles on that breaker circuit have GFI protection?

I have three electrical outlets in my garage which appear to be connected to one circuit breaker. I am assuming the outlet closest to to the panel is first in the three receptacle circuit. How ...
provlima's user avatar
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16 votes
4 answers
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GFI outlets tripped after power outage

I live in a rural area that has frequent power outages (Several per month. Less than a minute in duration). When the power is restored, several GFI outlets always trip. I am trying to track down ...
cyclops's user avatar
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16 votes
1 answer
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Do GFI/GFCI outlets have a potential to damage Nespresso machines (and coffee machines?)

I had a Nespresso Vertuo Next machine. It stopped working properly and during the troubleshooting video call, the Nespresso support agent said that the machines should not be connected to a GFCI ...
Steve V's user avatar
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16 votes
3 answers
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Is it normal for GFCI receptacles to explode and burn?

I noticed my tooth brush wasn't charging one morning and none of the plugs in my bathroom were getting power, I went down to the circuit box and saw a flipped breaker so I flipped it back and it ...
almarshall's user avatar
15 votes
4 answers
8k views

Loss of power when I remove item from the outlet

I have this unusual electrical issue in our master bedroom. I was wondering if anyone else has experienced this. We have this $3 LED night light in our bedroom and when we take it out, the power/...
Vipul Mistry's user avatar
15 votes
3 answers
6k views

Why did my leaking pool light trip the circuit breaker, but not the GFCI?

This is, I am sure, an extremely naive question. I hope that's okay (and I hope it can be answered at a level I'll understand). The background: My swimming pool has underwater light fixtures, on ...
WillO's user avatar
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15 votes
3 answers
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New GFCI outlet; green light is on but no power

I installed a new GFCI outlet with an one that was working. I wired it exactly as the older one and it isnt working. The green light is on but no power? I reversed the wires and no light. I replaced ...
Joe's user avatar
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15 votes
1 answer
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Can I add a standard receptacle on a GFCI circuit

So, I want to add a receptacle in the bathroom (I tend to run out of batteries on my phone while crapping at the end of the day). There's a GFCI outlet on the other side of the crapper wall that ...
SDGator's user avatar
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14 votes
6 answers
4k views

Can GFCI outlets be cleaned after flooding?

My house just went through a flood and there was 7 feet of muddy water on the first floor, so all the AC outlets were underwater. After the water receded, all the unprotected outlets continued to ...
Patrick's user avatar
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14 votes
1 answer
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Can a GFCI receptacle protect other receptacles?

My contractor has wired one GFCI receptacle in the main bathroom on the same circuit as a normal receptacle in our en-suite bathroom (it is less than a foot from the sink). he says that since they are ...
kers's user avatar
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13 votes
4 answers
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GFCI Breaker - Good or Bad?

I have a GFCI circuit (GFCI breaker in the breaker box). If I attempt to test this circuit by plugging in my GFI Tester into a standard outlet that is on this GFCI circuit, the GFI Tester lights ...
LAW's user avatar
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12 votes
3 answers
23k views

Is it possible to be electrocuted from a properly functioning GFCI circuit?

It's my understanding the the purpose of a GFCI circuit is to prevent shock by tripping the circuit if there is an imbalance in current in vs. current out. So my question is, if you have a functioning ...
Scott Mitchell's user avatar
12 votes
5 answers
19k views

What could be causing AFCI breaker and GFCI receptacle nuisance tripping?

I have a very unusual set of electrical issues that have proven difficult to troubleshoot. I live in a newly constructed house. Each bedroom has AFCI breakers. In the past 3 years living there, the ...
Omar Shahine's user avatar
11 votes
5 answers
32k views

Should I use a GFCI or AFCI circuit breaker with knob and tube wiring?

My American house was built in 1942, and much of the wiring is still knob-and-tube wiring (2-wire, no ground). Over the years new modern wiring has been added to the house, but we still have some KnT ...
Stefan Lasiewski's user avatar
11 votes
3 answers
5k views

Is an ungrounded GFCI outlet safer than a plumbing-grounded non-GFCI outlet?

I'm in the United States. I have a handful of three-prong outlets that have been grounded to the underground water main just as it enters the crawlspace. All of the ground wires are home runs to the ...
ArgentoSapiens's user avatar
11 votes
1 answer
2k views

Is it worth it to replace old style breakers with GFCI or AFCI breakers?

I have older wiring on my house (2-wire) BX. And while it's all in good condition, and I do check the outlets monthly to make certain it's still grounded, I'm wary of the BX sheathing as the ground. ...
Spencer K's user avatar
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10 votes
6 answers
9k views

Do my exterior GFCI outlets really need to be on their own circuit?

I am selling my home and the buyers had an inspection done where the inspector listed the exterior GFCI outlets as a safety hazard because they weren't on their own circuits. These outlets were ...
Benton J's user avatar
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10 votes
2 answers
2k views

Why is an inoperative garage outlet labeled "GFCI protected" not a GFCI?

I have a 25 year old home in Arizona. The breaker panel is standard with no GFCI circuits. I have 4 outlets in the house/garage and one outside, that do not work and people tell me that is because ...
Janelle Kessler's user avatar
10 votes
2 answers
9k views

WEATHER-resistant GFCI's required in bathrooms?

My new non-WR GFCI outlet says on the back of it... NOTICE:DO NOT INSTALL non-weather resistant devices in wet or damp locations as per latest NEC code. When installing weather resistant devices in ...
user62948's user avatar
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10 votes
3 answers
16k views

How should I address my bathroom's flickering lights and GFCI tripping mysteriously? (Schematic included.)

So I inherited a bit of a nightmare for wiring in my bathroom. I'll be calling in an electrician, but wanted to have an understanding of the problem first, as not to be ripped off, lead astray, etc.. ...
MarkD's user avatar
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9 votes
4 answers
5k views

Kitchen rewire gone wrong

We're renovating a hundred-year-old house that's been through several owners and has hodge-podge wiring. I've redone all the wiring from scratch in the rooms we've re-walled. Everything has gone well ...
Michelle's user avatar
9 votes
6 answers
15k views

Must outdoor GFCI power outlets be covered?

I have outside the regular (i.e. non-GFCI) power outlet that you see on the left. It has a nice double-cover that will keep water out. I am about to replace it with a GFCI outlet (right of the ...
Calaf's user avatar
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9 votes
3 answers
2k views

GFCI vs. 40v 5ah battery for water safety

My wife has recently taken to running a cord out near our pool to watch TV. She's very careful, but I was thinking of doing what I can to make it safer, since the outlet in question is NOT a GFCI ...
zzxyz's user avatar
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9 votes
2 answers
7k views

GFCI tripping on overload?

We called out the contractor who did our crawlspace encapsulation because the GFCI receptacle that serves the crawlspace loads (dehumidifier, sump pump, and two humidistat controlled fans) trips ...
dlu's user avatar
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9 votes
4 answers
66k views

How can I find the first receptacle in a circuit?

I know how to wire a GFCI receptacle and all the things to go with it in doing so. But what I do not know is the following. I understand the GFCI receptacle should be first in line to protect the ...
Ben's user avatar
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9 votes
3 answers
2k views

Why is LCDI protection required on window A/Cs *but not anything else*?

Background: LCDI cord sets have individually shielded conductors, and a circuit in the plug that detects current through the shields and cuts off the power. They are meant to detect live-to-neutral ...
jay613's user avatar
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9 votes
1 answer
8k views

Can I have multiple GFCIs on one circuit?

I have a 70s kitchen with a very long countertop. I understand that I only need one GFCI to protect the downstream outlets (for example near the sink). However, I decided instead to install 3 separate ...
Andrew's user avatar
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9 votes
1 answer
8k views

Should a GFCI interrupt the entire circuit?

I moved into a new house and never heard of this before, so I thought it was strange. On 2 circuits I've had a GFCI trip, and when they do, they trip the entire circuit. I thought they were just for ...
Dan Williams's user avatar
9 votes
1 answer
180 views

Is my wiring plan for a bathroom with a whirlpool and macerator reasonable?

Could I get another set of eyes on this schematic? It's a standard bathroom, however I'm adding a whirlpool tub pump, a whirlpool heater, and a macerator unit for waste discharge. I've read the ...
SlowSL's user avatar
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9 votes
4 answers
9k views

How to add a gfci and surge protector to pool pump line?

I want to add a gfci and surge protector to the 240v circuit for my pool pump. The 12 guage power wires (red and black) and ground (green) run from the corner of yard directly to the main breaker ...
DOC's user avatar
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8 votes
3 answers
2k views

How can I restore power to a gas-fired water heater protected by a tripped GFCI outlet?

We had some rain that blew sideways yesterday and tripped our outdoor GFCI which is connected to our tankless gas water heater. The orange light is showing and we can’t reset the outlet. I’ve turned ...
Leslie's user avatar
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8 votes
3 answers
4k views

No ground wire or GFCI for a dishwasher

I recently purchased an apartment in New York City built ~2006, and we started renovating the kitchen. After I unhooked the dishwasher (an older Bosch model) I found that there was only a hot and ...
lchi's user avatar
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8 votes
3 answers
3k views

Can a GFCI circuit ruin a refrigerator compressor?

The kitchen at the house that I rent is wired funky: the fridge receptacle does't have a GFCI button, but it's on the same circuit as a countertop receptacle that does have a GFCI button, so that ...
Yuri Niyazov's user avatar
8 votes
4 answers
2k views

Alternative GFCI Wiring in Strict 240V Scenario?

I have a strict 240V wiring situation (i.e., two hots + ground, no neutral) with a hot tub as the only load on the circuit. Now, I think it’s very prudent (and generally mandated) to have a local ...
DIYnot's user avatar
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8 votes
3 answers
4k views

Is a GFCI receptacle device a circuit breaker? [duplicate]

I have been told that a GFCI receptacle is a "circuit breaker" in the sense that it will trip under overload. Everything I know, have been told, and have read from experts to manufacturers says this ...
Speedy Petey's user avatar
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8 votes
3 answers
10k views

How can I find my bathroom's GFCI?

I have a half-bath on the main floor of our house that is small and has only 3 electrical items in it: Light above the sink (and corresponding light switch) Fart fan (and corresponding light switch) ...
Jaxidian's user avatar
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8 votes
2 answers
3k views

Should my receptacle tester be able to trip a GFCI breaker in the panel box?

I have a receptacle tester with a button to test GFCI. It works properly in tripping the GFCI if the outlet itself is a GFCI outlet. However when I test it on circuits which have a GFCI breaker ...
brentonstrine's user avatar
8 votes
4 answers
12k views

GFCI for aluminum-wired house

I recently bought a house built in the US in the 1970s. It has all-aluminum wiring. A last-second fix to pass the occupancy inspection involved replacing some malfunctioning GFCIs with, unbeknownst ...
Bort's user avatar
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8 votes
1 answer
6k views

When there is a power outage the wine cooler GFCI outlet stays off after power returns and need s to reset, what is the cause?

Total three outlets on a 20 amp breaker: Wiring # 12 / 2 from breaker to Receptacle #1 line. Receptacle #1 for Ironing cloths. 20 amp GFCI receptacle. Wiring # 12 / 2 from Receptacle #1 load to ...
Vincent saliba's user avatar
8 votes
2 answers
3k views

Does a water closet (toilet stall) require an electrical outlet?

In my master bathroom, I am creating a "water closet": a private space for the toilet. It is 6'6" x 3'6" and similar to a stall in a public bathroom. It has full walls, a full-...
Gary R.'s user avatar
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8 votes
2 answers
19k views

Is there any advantage to using a weather resistant GFCI in a bathroom?

I'm replacing an old GFCI in a bathroom, and for a little more money, I could buy one rated for weather resistance. This bathroom has no fan (only a small window), so it can get pretty steamy with ...
Johnny's user avatar
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