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

Filter by
Sorted by
Tagged with
27
votes
9answers
214k 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 ...
18
votes
4answers
228k 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 ...
18
votes
5answers
73k 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 ...
17
votes
5answers
20k 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
votes
4answers
81k 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
votes
4answers
233k 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
votes
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
votes
4answers
2k 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
votes
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
votes
3answers
5k 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
votes
1answer
64k 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
votes
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
votes
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
votes
10answers
161k 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
votes
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
votes
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. ...
10
votes
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
votes
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
votes
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.. ...
10
votes
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 ...
9
votes
7answers
7k 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
votes
5answers
17k 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
votes
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
votes
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
1answer
4k 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
665 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
9k 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
votes
1answer
4k 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
77k 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
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
votes
2answers
67k 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
40k 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
2answers
11k 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.
7
votes
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
3answers
951 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
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
2answers
94k 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?
6
votes
6answers
43k 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
86k 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.
6
votes
2answers
30k views

How do I wire a switch to control a GFCI Receptacle?

I want to switch a GFI outlet. It will be on a single 20 Amp circuit breaker with no other outlets or devices in the circuit or downstream from the outlet. It will be used to switch a dust ...
6
votes
2answers
13k 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 ...
6
votes
4answers
20k views

Can I plug a multi-outlet adapter into a GFCI outlet?

I have a GFCI outlet in my kitchen where I would like to plug in more than two things. I was thinking I could just add a multi-outlet adapter to one of the outlets, or maybe a short 1->3 plug ...
6
votes
3answers
68k 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 ...
6
votes
1answer
25k views

Why is this light fixture tripping the GFCI?

I recently replaced an outlet with a GFCI outlet in a bathroom in an older home (1960s), and added a light/bath fan. In the same box as the outlet I replaced was a single pole switch to a light over ...
6
votes
3answers
18k views

GFCI outlet hot when nothing's plugged into it

Using a thermal camera (coolest thing in the world, by the way), I discovered that a GFCI outlet in my bathroom is hotter then the surrounding wall when nothing's plugged into it: It's not boiling ...
6
votes
2answers
913 views

Does it matter if my newly installed GFCI reads “open ground”?

I just replaced a few two-prong outlets with GFCI outlets so we can plug in things built this millennium. Two of them outlets read "correct" on my circuit tester, but one reads "open ground." None of ...
6
votes
5answers
115k views

Why do I have a green light on my GFCI but the outlet will not come on?

While cleaning, my niece sprayed my GFCI outlet causing it to go out. I attempted to reset it but came up with negative results. I purchased another one, hooked it together (green light came on ...
6
votes
2answers
25k 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 ...
6
votes
2answers
7k views

What problems could occur if I plugged a 3-prong plug into a receptacle labeled “No Equipment Ground”?

I have several old, ungrounded outlets in my house which are protected with GFCI, which is allowed per code as the GFCI will protect a person in the event of a ground-fault. These outlets are ...