Ground fault circuit interrupter, also referred to GFCI, GFI, or a residual-current device. This devices detects a leak in current, or an imbalance between the current on the hot and neutral wires. This is used to prevent electrical shock.

learn more… | top users | synonyms

1
vote
3answers
4k views

Why isn't my GFCI receptacle working?

I am installing a GFCI outlet and I am having some issues. I have identified the hot and neutral wires. They test positive with the voltmeter when I turn on the switch. I connect the receptacle to ...
0
votes
2answers
38 views

How do I wire this switch/outlet combo?

This 5 minute task has kept me busy for an hour. Old switch/outlet combo melted. Replacing with gfci combo. Red/White pair is the line. Orange/White pair is the load to the light. Strangely, ...
3
votes
1answer
47 views

How do I replace two split receptacles with GFCI receptacles?

I need to replace two receptacles in my kitchen with GFCI outlets. On each receptacle, the top and bottom outlet are on different breakers. I've replaced standard outlets before, but this seems a bit ...
2
votes
3answers
91 views

What could be causing my new GFCI receptacle to keep tripping?

An electrician installed an outlet on a circuit inside my garage that is connected to an exterior spotlight. The spotlight has a sensor that automatically turns it on at dusk and off at dawn. There is ...
4
votes
3answers
3k views

Why does a GFCI trip when anything is plugged into the other outlets?

There is one outlet with the GFCI and several other outlets without. The GFCI outlet works fine, while anything plugged into the other outlets causes the GFCI to trip. How should I detect and fix ...
6
votes
1answer
21k 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. ...
0
votes
2answers
32 views

Change GFCI outlet/switch with regular switch

I have 2 switches in my bathroom: a fan (power comes into the fan and it's just a simple black/white to the switch) and a switch/outlet GFCI combo where the switch powers the lights but the outlet ...
0
votes
1answer
345 views

GFCI combination switch and outlet to fully switched protected outlet

Before a single screw comes out of the wall, I need to be sure I understand this fully, and rather than type out everything, I made a diagram based on what I was able to dig up on forums. This is for ...
1
vote
1answer
31 views

GFCI breaker trips, but GFCI outlet does not?

Little background before I ask question. I pulled a lines from main panel to outside subpanel, some 130 ft away. Put double pole regular breaker in the main panel (60A). In the sub panel I placed on ...
0
votes
1answer
81 views

What is causing the clothes washer GFCI to trip?

I have a clothes washer which came with a gfci adapter. The cord didn't quite reach the nearest outlet, so we had the washer plugged into a (grounded) 3-outlet interior extension cord, then to the ...
2
votes
2answers
286 views

Can I use a GFCI on an ungrounded 2-wire circuit at the terminus?

I mistakenly ran 18ga twin lead through plastic conduit out to power 12 volt lights. Never hooked up. Now I want to power a .68 amp 120V pump on a water feature. Too many 90 degree elbows to be able ...
4
votes
4answers
3k 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 ...
1
vote
0answers
21 views

Wiring a gfci switch combo…I can't get the light to turn off?

I have a Pass & Seymour GFCI Switch/outlet combo. I am replacing a switch/outlet combo that was a non gfci. I haver three wires coming into the box. The hot wire, the wire to the light and a ...
2
votes
2answers
74 views

How do I wire a light switch and outlet in the same box?

I have a single gang box in a bathroom with a GFCI outlet. I'd like to replace it with a 2-gang box containing a GFCI outlet and a light switch for the vanity light. The outlet will have both ...
1
vote
0answers
46 views

Gas Dryer suddenly trips any GFCI Outlet immediately upon being plugged in, but works fine in non GFCI

I have a Maytag Centennial gas clothes dryer in my laundry room. It is connected to a non-gfci outlet which is downstream of another outlet with built in gfci. It has been connected like this and ...
3
votes
1answer
155 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, ...
0
votes
1answer
33 views

GFCI trips after adding new circuit to it

Preface: I am a complete newbie when it comes to electrical circuits. I usually have electricians do all the work in our house. An electrician installed a circuit in our backyard with 8 outlets on ...
3
votes
3answers
3k views

Why is GFCI tripping 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 ...
0
votes
0answers
60 views

Can a GFCI receptacle share the neutral wire of another circuit?

When I connect my GFCI receptacle on one circuit that shares the neutral wire with another circuit, it immediately faults out. If I remove the second circuit from the neutral there is no problem.
1
vote
1answer
43 views

Is my outbuilding wired correctly?

I have a 3-wire source power wire (red/hot, black/hot, white/neutral and bare copper/ground) leading into an outbuilding to a light switch and GFCI outlet 4x4 metal box. This 3 wire provides power to ...
0
votes
1answer
35 views

Efficient way to determine line and load

My townhouse was built in the early 1980's, and since it was built, the state laws around which outlets are on a GFCI line have changed. The wiring itself is fine, just the receptacles need to be ...
11
votes
5answers
68k 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 ...
1
vote
1answer
48 views

How do I replace a GFCI breaker with a normal breaker?

I have a breaker on my panel that has 2 white wires and one black and a test button. I am changing to a breaker that has no white wires going to it just the black. Do I put both white wires to the bar ...
0
votes
0answers
46 views

Cant seem to get the GFCI to work

I'm not an electrician - I know enough to get basic wiring accomplished... or so I thought. I'm finishing my basement, and we ran 5 new outlets, in conduit, all are 15a. I have a box right next to ...
1
vote
1answer
36 views

Right way to add standard receptacle to this GFCI circuit

I've read Can I add a standard receptacle on a GFCI circuit and have a similar situation in that I need to add a receptacle to an existing GFCI circuit, but when I pulled the existing GFCI plug from ...
1
vote
1answer
80 views

GFCI Breaker - not tripped = outlets work, turn light switch on breaker trips, lights work but outlets do not

I had a kitchen remodel that went a bit bad with a contractor and his minions. The house was build in 1934 so has a two wire system with a 100A panel. As we remodel we are replacing 2 wire system ...
1
vote
1answer
110 views

Multiwire Branch Circuit with GFCI

I recently added some ceiling lights and had to tap into an existing junction box that had a 3 wire multiwire branch circuit run to it. This is a kitchen GFCI receptacle. The red wire is on a ...
2
votes
1answer
71 views

Why does a GFCI breaker trip when another breaker is accessed?

I just bought a new house, and on the first day there realized a breaker was tripping. It is one of only two GFCI breakers in the box. It's 20 amp with a bedroom/bathroom on it. I tested every outlet ...
1
vote
3answers
2k 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 ...
4
votes
2answers
123 views

What reasons are there to rewire an ungrounded circuit instead of adding GFCI protection?

The NEC allows replacing non-grounding-type (2-prong) receptacles with grounding-type (3-prong) receptacles by adding GFCI protection at the breaker or first outlet. What reasons might there be for ...
2
votes
4answers
66 views

Should I proactively replace old GFCI outlets?

The way I understand this page about GFCI outlets: (a) GFCI outlets can fail after about 10 years, making them unable to detect faults, (b) when outlets made after 2006 fail, they shut off power ...
1
vote
2answers
52 views

Can I use a three wire cable to feed a whirlpool tub?

If I'm required to add 2 dedicated GFCI circuits for a whirlpool tub and inline heater, can I run 3 wire cable (red,black,white,ground) or do I need 2-2 wire cables?
2
votes
2answers
117 views

What options are there to achieve both grounding/ground-fault and arc-fault protection on old 2-wire circuits?

The three receptacle circuits in my house are 2-wire NM, but have 3-prong receptacles. My electrician recommended and installed GFCI breakers to provide "grounding" to these circuits. I now realize ...
0
votes
0answers
53 views

How can I add a GFCI receptacle on a circuit with split receptacles?

I have a typically wired living room with all receptacles switchable on the top outlet. We are installing a large fish tank and decided to add GFCI protection. I'm trying to change a single duplex to ...
0
votes
0answers
63 views

Why won't a replacement GFCI work when the old one was wired identically?

I am trying to replace an old GFCI outlet box in the bathroom. I bought a new one and wired it the same as the old one (the new one had extra screws). The new outlet has a tiny green light on the ...
1
vote
0answers
28 views

What's wrong with my replacement GFCI outlet?

I'm trying to replace a GFCI outlet in my bathroom. (the old one trips almost every time you plug something in) When I connect the line wires from the panel to the line poles and the load wires to ...
9
votes
3answers
4k 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 ...
4
votes
2answers
344 views

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

Do gfci's have to be on a 20 amp circuit? Also if you use the receptacle type gfi do you just need one in a circuit or do all receptacles have to be gfi?
0
votes
1answer
46 views

What could be causing my GFCI outlet to trip?

I have a GFCI outlet in my garage that keeps shutting off. I have unplugged all utilities from it and it still trips off. I replaced it with another GFCI outlet. When I hooked up that new outlet it ...
3
votes
1answer
136 views

How can I install a GFCI receptacle to provide protection to other devices?

I currently have in my shop, a 20 amp outlet directly below my panel which is approximately halfway along one of the walls. Instead of having the GFCI outlet at the end, I would like to replace the ...
2
votes
2answers
346 views

Use of combination CAFCI and GFCI breakers instead of recepticles

I am about to begin a project that will include one or two new circuit for outdoor lights and receptacles attached to the main building. I will probably installing a new home run line from the panel ...
0
votes
1answer
52 views

I have Direct tv plugged into a gfci protected receptacle. All of the receptacles on same circuit will go dead, but not trip the gfci. Why?

Ok the GFCI is located in the 5th wheel upstairs bedroom/sink. It is protecting 4 of the receptacles in lower level next to sink and tv/stero area. I have a direct tv (tailgater) plugged into the ...
1
vote
1answer
456 views

How to GFCI protect bathroom lighting circuit

I have an old house with 3 bathrooms all on the same circuit. Each has an light with a receptacle above the sink controlled by a wall switch. (See image below.) I want to GFCI protect the entire ...
1
vote
2answers
217 views

How to wire GFCI outlet

The bathroom includes a GFCI outlet that will not reset. Research revealed that such outlets do seem to stop working sometimes. So I am attempting to replace the outlet. After pulling the faceplate ...
1
vote
4answers
357 views

Sump pump & ejector pump: can I (and should I) change single dedicated non-GFCI receptacle to a dual receptacle GFCI?

Moved into a new home about 6 months ago which had been gut rehabbed. Our mechanical room has 2 pits, one for the sump pump and another for the ejector pump. I was planning on installing a ...
2
votes
4answers
6k 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 ...
1
vote
2answers
64 views

GFCI Outlet trips when white and copper wire touch

I wired a bath renovation with all power routed through a GFCI outlet. With power on, and all switches off, when I touch the white wire and the bare copper wire in a fixture box, the GFCI trips (did ...
0
votes
1answer
97 views

Upgrade from outlet/switch combo to GFCI + outlet

In a bath in my house I currently have a very old (likely original 1949) outlet/switch combo. The outlet is hot, not dependent on the switch being on. The switch controls vanity lights. I would ...
12
votes
4answers
20k 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 ...
0
votes
1answer
82 views

Is it possible for the black wire to be hot but to create reverse polarity in a GFCI?

Is it possible for a black wire to be hot, but to cause reverse polarity in a GFCI when it's connected to the brass screw? A no-contact voltage tester shows that the black wire is hot. The white wire ...