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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28
votes
9answers
223k 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 ...
23
votes
3answers
4k 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 ...
21
votes
3answers
1k 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 ...
20
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5answers
81k 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 ...
19
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4answers
242k 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 ...
17
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5answers
23k views

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 ...
16
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4answers
85k 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 ...
16
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4answers
248k 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 ...
15
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4answers
6k 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/...
15
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4answers
3k views

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 ...
14
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3answers
3k 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 ...
14
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3answers
6k views

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 ...
14
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1answer
66k 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 ...
14
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1answer
16k 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 ...
13
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6answers
3k views

GFCI outlets - can they be repaired? Are they really needed at the end of a circuit?

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 ...
12
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10answers
172k 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 ...
11
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3answers
15k 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 ...
11
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1answer
1k 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. ...
11
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5answers
16k 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 ...
10
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2answers
3k 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 ...
10
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3answers
4k 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 ...
10
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2answers
12k 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.. ...
9
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4answers
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 ...
9
votes
7answers
8k 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 ...
9
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3answers
1k 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 ...
9
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5answers
18k 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 ...
8
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3answers
3k 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 ...
8
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3answers
5k 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) ...
8
votes
4answers
1k 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 ...
8
votes
1answer
5k 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 ...
8
votes
1answer
712 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 ...
8
votes
2answers
10k 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 ...
8
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2answers
12k views

Should switches in a kitchen area have GFCI protection?

Do the switches on the wall and over the counter areas have to be on a GFCI protected circuit? As there is live power at the switch all the time, I would think this to be true, but I'm not sure.
8
votes
1answer
5k 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 ...
8
votes
1answer
81k 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. ...
7
votes
4answers
955 views

Ground Fault Circuit Interrupter vs AFCI

What is the key difference between a Ground Fault Circuit Interrupter and an Arc Fault Circuit Interrupter? The Acronyms AFCI/GFCI kind of tell us that they do, detect ground faults and arc faults, ...
7
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3answers
46k views

What could be causing GFCI breakers and receptacles to trip?

I have a two wire system and after installing GFCI outlet in kitchen I realized there is a problem with some type of inconsistancy causing the GFCI to trip as soon as power is sent to it. Thinking the ...
7
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2answers
98k views

Do gfci's have to be on a 20 amp circuit, or can they be on a 15A?

Do GFCIs have to be on a 20 amp circuit? Also if you use the receptacle type GFCI, do you just need one in a circuit or do all receptacles have to be GFCI?
7
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2answers
74k 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 ...
7
votes
3answers
42k 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 ...
7
votes
1answer
49k 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 ...
7
votes
1answer
3k 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 ...
7
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4answers
2k 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 ...
6
votes
5answers
3k views

2 sets of line wires?

I was replacing a GFCI, and noticed 7 total wires: 2 load wires 4 line wires 1 ground It is my understanding that the line wires are the power source coming to the GFCI, and the load wires are ...
6
votes
4answers
58k views

How can I stop this GFCI receptacle from tripping?

In my garage I have two wall receptacles on opposite sides of the garage. On one side the receptacle is a GFCI receptacle and the other side is a normal one. In the normal receptacle I have a small ...
6
votes
3answers
968 views

Low AWG in long outdoor run, but with GFCI protection

I'm running a circuit out to our shed/chicken coop. We live in New Hampshire. The electrical demand won't be high, so one 15 amp circuit will be sufficient. We currently have 3/4" schedule 40 buried ...
6
votes
6answers
45k 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 ...
6
votes
1answer
10k views

GFCI outlet won't come on

I have a couple recently installed (By a professional licensed electrician) GFCI outlets outside a barn, both on their own circuit. Both have water trough heaters plugged into them - 1500 watts each. ...
6
votes
1answer
266 views

GFCI receptacle will not reset

My GFCI tripped and would not reset. I jumpered out the outlet and all power returned to normal. I assumed it was a defective GFCI so I replaced it. Same problem. Power is available at the line side, ...
6
votes
1answer
92k 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.

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