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.

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Electrical outlet right above sink

I recently moved into a unit of a 4 plex in Ontario, Canada. This thing scares me: Is an electrical outlet allowed to be above the sink like that? Was it ever allowed? It it something that ...
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46 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?
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307 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 ...
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61 views

Odd receptacle wiring

I have several receptacles with two cables: one has black and white wires, the other - black and red wires. Can I replace these receptacles with GFCIs? If affirmative, how should I interpret the red ...
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44 views

Should I replace a GFI in my kitchen that will not reset?

I have three wall plugs fed into a 15A wall GFI. One of the outlets has a refrigerator with a two pronged plug. When plugging in a toaster oven and countertop grill the circuit tripped and will not ...
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666 views

Why are GFCI systems typically in the receptacle instead of in the breaker?

Since the breaker box contains all the other electrical safety equipment it would make sense to put GFCI systems here; and GFCI circuit breakers are available which do this. But GFCIs inside ...
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41 views

How to map out downstream outlets for GFCI install

I live in an older home with 2 prong plugs. I want to update these with 3 prong. My plan is to put a GFCI at the first outlet in the circuit and then regular 3 prong outlets downstream from there. I ...
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28 views

Gfci supplies a dock keeps tripping and can't be reset only replaced

I have educated myself about gfci's although I am a diy'er. My gfci has my dock plugged into it. About once a year it trips and can't be reset only replaced. All outlets on the dock are weather proof. ...
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44 views

Washing machine randomly tripping GFCI

I read a previous question regarding a GFCI outlet and a washing machine, but my issue is slightly different. I have 2 GFCI outlets in a washroom in the downstairs of my home. One is obviously ...
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38 views

How do GFCI breakers behave on two wire circuits?

Will a GFCI breaker nuisance-trip if a three prong outlet has a jumper between ground and neutral on an old two wire system?
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31 views

Can a GFCI combo and a switch be independently connected to a light and a fan using 14/3 wire?

The box on the left in the diagram is a dimmer switch and the box on the right is a GFCI combo switch. The ground wiring is absent from the diagram. How can this wiring be completed to connect the fan ...
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152 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 ...
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49 views

Sauna tripping GFCI

I've just finished up wiring an old heater in my sauna. It has laid around in a shed for a decade or so and am wondering if it's spent. It powered on fine and heated for about 5 minutes until the GFCI ...
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1answer
49 views

Why do you need a Residual Current Device if you already have trip switches?

My electrician has suggested installing a RCD into the house. We already have trip switches so I am not sure what the point is (but then my knowledge of RCDs is limited to what the Wikipedia article ...
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1answer
72 views

Wiring Combination Switch GFCI Outlet

I read some related questions, but can't find an answer given my wiring. I'm trying to wire a combination switch/GFCI outlet Pass & Seymour 1595SWTTRWCC4. I also checked the wiring diagrams, and ...
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52 views

Is there a safe alternative to electrical grounding for computers in Argentina?

I came across this APC product page for Microsol Isolator Modules, which purportedly provide "safe power in places with poor or nonexistent grounding." The unit is meant for Brazil, so it won't work ...
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100 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 ...
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1answer
102 views

GFCI Kitchen Circuit(s)

I understand that all wall receptacles (including counters) must be GFCI protected in a kitchen with a combined dining area but how about a separate dining area/room receptacles (separated from ...
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121 views

How to wire a GFCI duplex outlet with a garbage disposal switch & combo outlet on load?

We moved into a new house last week. I was greeted with a faulty garbage disposal switch in the kitchen. The switch works intermittently depending on how hard it's pressed. The second issue was the ...
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64 views

gfci breakers vs afci / dfci

If I use GFCI breakers do I still need GFCI receptacles? Also I see some combonation AFCI / GFCI breakers. Are these reliable? And my last question of the weeek. Is the home run in a branch circuit a ...
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40 views

Can I wire a GFCI so that each receptacle is controlled by it's own switch?

Can I wire a GFCI so that each receptacle is controlled by it's own switch? This is for a water fountain pump and light. Diagrams, please.
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3answers
52 views

Continue with Back Wire on GFCI when the wire keeps coming out?

Having trouble with the back wire on GFCI's popping free. 20amp, 12 gauge wire. When I fold the wires into the box, they like to come free of the back wire hole. I suspect this is due to the ...
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174 views

Can I run power from a GFCI receptacle to a standard receptacle then to a light switch?

I have a single GFCI outlet and I want to add a few standard receptacles and a light from it. I am curious if it is possible to go from the GFCI, to two standard outlets then on to a light switch?
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63 views

How to connect a earth leakage detection GFCI/ELCB?

My specifications are as follows: 2 in phase 120V lines 1 Neutral 1 Ground So, I should use a 240V GFCI, right ? This is the one I plan to use: Heavy Duty - High Power GFCIs part no- 23250 003-1 ...
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219 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, ...
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54 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 ...
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230 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 ...
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1answer
95 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 ...
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43 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 ...
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2answers
1k 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 ...
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113 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 ...
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1answer
786 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, ...
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40 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 ...
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140 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.
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57 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 ...
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63 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 ...
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51 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 ...
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1answer
159 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 ...
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1answer
79 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 ...
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1answer
307 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 ...
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1answer
198 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 ...
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1answer
119 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 ...
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4answers
102 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 ...
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2answers
108 views

Problems with GFCI outlets recently installed

I had 3 GFCI outlets installed recently in my home in by a contractor and now have some lights that do not work at all. The contractor put one in my kitchen, one in my 2nd floor bathroom and one in ...
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168 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 ...
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71 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?
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235 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 ...
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85 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 ...
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84 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 ...
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40 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 ...