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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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 ...
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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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31 votes
6 answers
144k views

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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28 votes
3 answers
8k views

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
8 votes
1 answer
92k views

How do I wire a GFCI/Switch Combo?

I'm replacing an old GFCI/Switch combo. In the old one there are two wires coming into the line side, a hot wire and a neutral. On the load side there is one wire leading up to the lighting fixture. ...
Daniel Ahrnsbrak's user avatar
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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15 votes
1 answer
93k views

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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6 votes
4 answers
12k views

Does a GFCI receptacle provide overcurrent protection?

Does a GFCI receptacle provide over-current protection? (note that I'm not referring to GFCI circuit breakers as may be found in a service panel, nor to specialty devices such as an inline plug-in ...
Johnny's user avatar
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7 votes
6 answers
68k views

Why does my GFCI circuit breaker trip with any small load, even after replacing the breaker?

I have a 20A 240V GFCI breaker in my main breaker box going to a conduit to another breaker box outside. All worked well last summer. Now, when I put any load (weed-eater, light, etc.) on an outlet ...
Charles Burns'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
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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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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3 votes
1 answer
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When replacing non-grounding type receptacles is a GFCI receptacle required, or can any GFCI device be used?

Under the NEC (it was 210(7)(d)(3), but appears to have moved around some), it is permissible to replace an ungrounded receptacle with a GFCI receptacle, then wire further ungrounded or non-grounded (...
ThreePhaseEel'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
8 votes
3 answers
56k views

Are non-GFCI outlets that are downstream of a GFCI outlet ground fault protected if they are fed from the GFCI outlet's load side?

Are non-GFCI outlets that are downstream of a GFCI outlet ground fault protected if they are fed from the GFCI outlet's load side? If those non-GFCI downstream outlets were not fed from the GFCI ...
Howiecamp's user avatar
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8 votes
3 answers
127k views

Does a garbage disposal and/or dishwasher need to be on a GFCI?

Part of me always cringes when I turn on the garbage disposal with a wet hand, which got me thinking... Does this thing need to be on a GFCI? And on that same thought, does the dishwasher need to be ...
diceless's user avatar
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7 votes
1 answer
114k views

Why would a GFI blink red

A detached garage on a property was recently wired with a 220 circuit to accommodate lighting, washer, and electric dryer . The problem is the GFI for the washer blinks red.
Daniel Stulting's user avatar
6 votes
2 answers
108k views

How do I wire a GFCI receptacle using two black wires and two white wires?

I recently purchased an older home and wanted to install GFCI outlets in the kitchen. When I opened up the outlet, there were four wires (two black and two white) in addition to the ground. I ...
Stephen Doyle's user avatar
5 votes
1 answer
20k views

Do all conductors on a 20-amp circuit need to be 12 AWG?

I'm rewiring a bathroom, and will install a GFCI receptacle on a 20 amp circuit breaker (dedicated to the bathroom only). I am also going to have a fan and vanity light on the same circuit, ...
the_meter413's user avatar
2 votes
1 answer
637 views

Installation of a GFCI without a ground wire

I'm installing a GFCI plug in a house built prior to 1962. The receptacle box is plastic and has only a 'HOT' & 'Neutral' wire coming into it. Do I need a ground wire to properly install the GFCI? ...
Doug's user avatar
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0 votes
4 answers
3k views

How to Use GFCI Square Cover?

I have a 4" square box which I'm going to put a GFCI outlet in. I got one of the raised covers with a rectangular cutout for GFCIs. However, the outlet itself doesn't sit flush with the cover. When ...
Wei's user avatar
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0 votes
2 answers
49k views

Why does my refrigerator trip the GFCI outlet? [duplicate]

I've been reading around the net for about 20 minutes and came across a lot of talk about how the fridge should be on their own 15 or 20 Amp breaker and the defrost cycle can cause the interrupt in a ...
user avatar
14 votes
1 answer
18k views

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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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
8 votes
1 answer
338 views

Avoiding GFCI for my fridge

I'm wrapping up a whole kitchen remodel, including redoing most of the kitchen electrical. Today we installed the fridge in its new location and plugged it into its new outlet, but 15 minutes later it ...
peter's user avatar
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8 votes
1 answer
50k views

Why doesn't my GFI receptacle reset?

I have a GFI receptacle in my kitchen that feeds four other receptacles. It tripped the other day and I cannot get it to reset. All of the other receptables on the circuit are not functioning which ...
amarcy's user avatar
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7 votes
1 answer
18k views

Why does my GFCI outlet trip as soon as the breaker is turned on?

I have an outlet feeding other outlets about 50 feet away. All the outlets are outdoor enclosed in a protective weather cover. Today I wanted to replace one of the receptacles with a GFCI so all the ...
Hussein's user avatar
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7 votes
2 answers
27k views

AFCI breakers/protection and refrigerators - a bad idea?

The 2014 NEC requires AFCI protection for refrigerators. I've read that one shouldn't use GFCI protection for a refrigerator, but I know that AFCI breakers do include ground-fault protection (at a ...
PhilPDX's user avatar
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6 votes
4 answers
32k views

How should I wire a GFCI outlet and a switch to isolate the switch but provide GFCI protection further in the series?

I am replacing the outlets for my garbage disposal/dishwasher circuit in my kitchen. Currently on that breaker there is one non-GFCI outlet with a pigtailed switch controlling the garbage disposal and ...
Drew Spickes's user avatar
6 votes
5 answers
14k views

Why do unfinished basements need GFCI outlets?

I was replacing outlets in the basement and noticed that unfinished basements require them to be GFCI protected. While I did do this, I can't help but wonder: WHY?? I searched for the NEC ...
Adirondack Jim's user avatar
6 votes
3 answers
744 views

New GFCI outlet popping with high powered appliances

When I plug a high powered (1200W) device into my new GFCI outlet the GF circuit pops after 3 or 4 minutes. It does not pop if I plug the same device into a downstream outlet fed by the load ...
jay613's user avatar
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6 votes
1 answer
69k views

How to wire a 240V disconnect panel for spa that does not require neutral?

I'm wiring a 240V/60A hot tub which requires 3 conductors; one of these conductors is ground. No neutral is run to the tub. That said, I have a red, black, and green running to the hot tub from the ...
Scott Lin's user avatar
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4 votes
2 answers
1k views

Where are the two pole CAFCI/GFCI breakers?

Why aren't there very many (any?) two pole dual function breakers? Is a GFCI + CAFCI breaker less useful for 220 or MWBC? Is it be prohibitively expensive? Or is there no demand because not many want ...
Matt Thomas's user avatar
3 votes
3 answers
8k views

Weather Resistant Outlets vs Weather Proof Box

If I use a regular GFCI in a Weather Proof In-Use box does the GFCI have to be the Weather Resistant kind?
user770395's user avatar
3 votes
2 answers
3k views

Does NEC require a refrigerator outlet within six feet of a sink to be protected by GFCI?

I'm trying to find out if an outlet for a refrigerator within six feet of the sink requires GFCI outlet. I read somewhere that 210.8 (A) (7) Sinks - where receptacles are installed within (6 ft) of ...
BobHatcher's user avatar
3 votes
3 answers
11k views

How to independently switch a GFCI outlet?

I would like to add a plug outside where each plug would be independently switched. The use of this is to be able to switch a rope light and a fan separately. This is being added to a new breaker so ...
Kellenjb's user avatar
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3 votes
2 answers
2k views

Is there any benefit to tripping a GFCI receptacle when it's not in use?

I have a few outdoor GFCI receptacles. (They are on different circuits.) I probably use these receptacles for 2 hours in a given year. In other words, I rarely use these receptacles. Keep in mind ...
slack's user avatar
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2 votes
2 answers
5k views

Circuit tester trips new GFCI

I replaced a non-protected receptacle with a GFCI type and now my circuit tester trips the GFCI as soon as it is plugged in. The receptacle tested fine before replacement, ground, neutral, hot, etc. ...
tharen's user avatar
  • 121
2 votes
2 answers
631 views

Connecting 2 GFCI Breakers to 2 Hot Leads and 1 Common

So I just bought my first house and in lieu of changing loads of outlets in the kitchen for GFCI outlets I went with two 20A GFCI breakers. Upon going to install the breakers I found that the cable ...
Scott's user avatar
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2 votes
1 answer
760 views

Wiring for switched NEMA 6-20R and 5-20R in same box in garage

My goal is to have 20A receptacles in a particular spot in my garage dedicated to power tools (such as saws) whose motors can be configured for either 240V or 120V, with a switch as a handy second ...
Matt Thomas's user avatar
2 votes
2 answers
15k views

Multiple circuits in the same conduit to outbuildings

We currently have a single 15 amp circuit feeding the pool filter, then the pool shed and then the gazebo. We recently buried a new conduit from the house to the location of the pool filter receptacle....
Ed Haber's user avatar
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1 vote
2 answers
4k views

two circuits on a single pole GFCI breaker?

I think I may have found an instance of "hill-billy" wiring in my circuit box. I have a 15A GFCI breaker. Strangely, it is hooked up to the up stairs bathroom AND the outdoor outlets. Recently it ...
cshimer's user avatar
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1 vote
1 answer
339 views

Replacing receptacle with GFCI outlet which will be tapped for outdoor pole lantern

I am installing an electric outdoor pole lantern which will be fed by an underground UF cable in conduit buried 24" I would like to tap into a new GFCI outlet which will will be replacing a regular ...
provlima's user avatar
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1 vote
4 answers
20k views

How do I wire a GFCI combination light switch when power enters at the light?

I have a Leviton 7299-NW GFCI/switch combo The diagrams in a response to the question "How do I wire a GFCI/switch combo?" is helpful. But I want to see a diagram for a situation where the power ...
user11933's user avatar
  • 251
0 votes
3 answers
309 views

Two GFCIs in series, which would trip?

If you have two GFCIs connected in series, which would trip first or both?
Jtl's user avatar
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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
  • 231
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
  • 319
15 votes
3 answers
298k views

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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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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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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