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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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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434 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 ...
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Sump Pump Trips GFCI Receptacle. Is a single, dedicated non-GFCI receptacle safe?

I recently replaced my sump pump in one of my two sump pits. To comply with codes, I replaced the outlet with a GFCI type outlet. Unfortunately, once I turn the power back on, the GFCI trips ...
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36 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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110 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 ...
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42 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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46 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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78 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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83 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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36 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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158 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 ...
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52 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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45 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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54 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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49 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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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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42 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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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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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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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 ...
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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 ...
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102 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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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 ...
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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. ...
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42 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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295 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 ...
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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 ...
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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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397 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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69 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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289 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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37 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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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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50 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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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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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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67 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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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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53 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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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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161 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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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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4k 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 ...
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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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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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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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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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69 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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70 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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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 ...