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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What breaker size for box containing two GFCI circuits?

What should the main panel breaker size be to control a 60amp GFCI for a hot tub and a 15amp GFCI outlet. The gfci's are mounted in a box that will be wired to the main panel.
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751 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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24 views

Is my RCD Breaker faulty?

Every 2 weeks my main RCD trips and it wont reset. After an hour it will allow me to reset it and its fine for 2 weeks. The main RCD has a short spur to another mini RCD board that was installed 10 ...
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29 views

GFCI outlet doesn't work after reconnecting

I reconnected my GFCI outlet but now it doesn't output electricity even though the current coming in tests positive (with a pen like current testing device). I also pressed the reset button, to no ...
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86 views

Hot Tub Disconnect Location

I have a concrete slab which can fit a hot tub approximately at a distance of 8 feet from the main breaker panel (located outside on my porch). I assume that I will still need a separate disconnect ...
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57 views

New GFCI in garage is tripping when driveway lights are turned on

So I had GFCI outlets put into the garage to use for Christmas lights outside. After installing, the christmas lights all work great but when I flip the switch in the foyer for the lights at the end ...
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6k views

Why does my fluorescent ceiling fixture trip the GFCI sometimes?

Every so often, roughly a 1/20 chance, flipping the light switch to my laundry room's fluorescent fixture will trip the nearby GFCI outlet. Why is this? Is it more likely to be the GFCI being faulty ...
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39 views

GFCI pops when the heater comes on

Just wired a new heater like this and the GFCI pops when the heater comes on. Can someone explain to me why this is happening?
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51 views

Open Hot on GFCI outlet

I have an outdoor GFCI outlet that was running our Christmas lights. We was just struck with a storm that we received 3.6 in of rain in a 6 hour period. Now the reset will not work, green light is not ...
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46 views

Wiring diagram/configuration 8 outlets with 1 GFCI protector

Installing new circuit 20 amp breaker with 20 amp outlets with 1 GFCI protector. Should GFCI be the fist outlet from breaker panel? How to wire this project.
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27 views

GFCI issue with grounded protected receptacle

Trying to wire GFCI and a protected receptacle into the same box for 4 outlet set up. When I wire protected receptacle to LOAD side and connect it to the ground, the GFCI test fails. If I ...
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5k views

Why does my GFCI receptacle trip when anything is plugged in?

My house was built in 1994. The garage is fed from one 20amp circuit wired to the lights first, then a GFCI, then a couple regular outlets. This has worked fine for me for 19+ years. We had a ...
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31k 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. ...
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614 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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46 views

Why does my GFCI trip randomly?

I have a GFCI in the kitchen has started tripping all of a sudden. It may trip several times a day. I have the same things plugged in that I have had for months. Nothing has changed with the usage so ...
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16 views

1 outlet / 2 switches: want to replace old outlet with GFCI

(Similar to How do I install a GFCI receptacle with two hot wires and common neutral? but hopefully different enough to warrant my question.) In our bathroom we have 1 outlet and two switches in the ...
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52 views

What is the *interrupting rating* of a GFCI receptacle?

Say, we have a UL943 compliant 15A GFCI receptacle on a garden-variety 15A grounded branch circuit. Some nitwit comes along and wirenuts the receptacle's load-side hot to the branch circuit ground, ...
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3answers
647 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 ...
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25 views

Do newer GFCI receptacles still trip due to inductive load from motors?

I am rewiring a kitchen and faced with a dilemma of having the garbage disposal on a GFCI circuit. Will it trip when turned off like the older GFCI's?
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81 views

Is this a faulty GFCI receptacle?

Need some advice on an electrical issue I'm having in my new condo. My bathroom has a GFCI receptacle (similar to this one). I noticed one morning that the LED indicator was out, so I figured ...
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384 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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2answers
70 views

GFCI Outlet wired to non GFCI. Can I switch?

I have a GFCI outlet that is wired to another non GfCI outlet. So when either has a problem, they will trip off. My question. Can I reverse these outlets? Let's say the GFCI outlet is on my left ...
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39 views

Is it acceptable to decrease the HP rating of a blank-face GFCI?

I have a 20 amp Blank Face GFCI rated at 1.5HP that is protecting two outdoor 15 amp receptacles. Could I use a 1hp blank face GFCI instead? Also, why wouldn't the electrician used a regular gfci ...
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58 views

GFCI breaker trips when switched on

I'm buying a house. It's an old house. I had to put in a GFCI breaker for the bathroom. It trips as soon as I switch it on. If I disconnect the neutral it doesn't trip. It is three wire coming ...
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5answers
19k 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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105 views

GFCI installation in bathroom switch box doesn't work as expected

My bathroom wall switch controls the old light above the old medicine cabinet but it only has 1 cable with a black and a white wire. I took off the old switch and put the black wire on the hot side of ...
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441 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 ...
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129 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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2answers
54 views

How can I detect the total ground fault leakage current in my home?

In Europe, houses often have all breakers chained beneath one or more RCDs (their word for GFCI). I would not want the nuisance of multiple circuits shutting off at once, so I'm glad in the US we ...
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3answers
158 views

Does a GFCI receptacle provide overcurrent protection?

Does a GFCI receptacle provide over-current protection? (note that I'm not referring to GFCI circuit breakers as may be found in a service panel, nor to specialty devices such as an inline plug-in ...
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27 views

20/30 GFCI spa disconnect

Instead of spending 400 on a spa disconnect with a 2 pole 20 amp gfci and a 2 pole 30 amp gfci breaker. Can I take the 50-60 amp gfci breaker from the spa disco, put that in the main panel and use ...
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39 views

Is this GFCI shot?

Last year I installed an old GFCI outlet in a switch box. As verified with a multimeter, the white wire is neutral, and the black wire is hot. Note that this picture was taken after I took off the ...
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33 views

Why do I get an open ground warning after a GFCI Test?

I just finished a home wiring project which has a set of outlets protected by a GFCI outlet. I was testing them with an outlet tester and noticed something odd: Immediately after a GFCI test, my ...
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68 views

Breaker Tripping Mystery

I have a mystery regarding trip switches. The 2 switches that I isolate when the problem occurs the 2 breakers does not trip individually, The main breaker trips all the time which is on a different ...
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1answer
72 views

Hot wire splits into two neutrals that take different routes back to panel; is this legit?

I discovered this in the course of replacing an old ungrounded receptacle with a GFCI. I connected a run of lights controlled by three-way switches (two switches) to the load side. Afterwards, as soon ...
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33 views

Bathroom Electrical question GFI

Can I run a 12 2 wire off of a 20 amp breaker to a splitter box, then from the splitter box run one 12 2 wire to a light switch, then to 5 can lights? Then one more wire from the splitter box to ...
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1answer
142 views

Taking power from double light switch to GFCI outlet

I am redoing some wiring in my bathroom. I have a vanity light on a single switch, a vent fan and ceiling light combo on a double switch and a GFCI outlet that are wired together in that order. It ...
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1answer
68 views

Why does my greatroom have a GFI breaker on the circuit?

We moved into a condo in 2012 and have had issues on one of the circuits. The circuit serves the outlets in our great room and sun room. Initially, we would trip the breaker when using the vacuum ...
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2answers
9k 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 ...
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2answers
42 views

Switches and outlets not working after short to ground

I was replacing a outdoor GFI when putting back in box the ground touched the lower unused terminal and fried the ground, shorted GFI out. Now I have some switches in the house that do not work mainly ...
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2answers
48 views

GFCI equipped machines into GFCI receptacle

I have a personal bowling ball cleaning machine that states "plug to a non-GFCI outlet" which means it has built-in GFCI however, in the area I am living, all receptacles must be GFCI protected and ...
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1answer
100 views

Can I protect a dimmer switch circuit with a GFCI outlet?

I'm installing some line-level-dimmable LED undercabinet lighting in my kitchen. I'd like to protect it with one of the existing GFCI outlets in the area. My sequence would be GFCI > dimmer switch > ...
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1answer
39 views

GFCI won't catch

I have a GFCI in my garage that was working, but now won't catch at all. I pulled the downstream circuit by disconnecting the load wires and it still won't reset. I have 120 to the GFCI itself. I ...
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1answer
8k views

How to add GFCI to a box with one outlet controlled by a switch?

I'm pretty inexperienced when it comes to electrical work, though I do know my way around a circuit diagram, thanks to some EE courses in college. I think this is one I can do myself, I just would ...
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1answer
26 views

There is no GFCI outlet in my basement, and circuit breaker reset won't work

Half of our basement outlets went out, and flipping the switch at the circuit breaker (multiple times) did not work. The affected rooms are fully underground and the likelihood of moisture is high. ...
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1answer
61 views

Should a switch near a sink be on the load side of a GFCI outlet?

If a switched GFCI protected outlet is required, and the switch will be near a sink (above a counter-top), should the switching be done the load side of the GFCI outlet? (e.g. for a garbage disposal) ...
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256 views

Why is the coiled white wire on a GFCI circuit breaker smaller than the branch circuit neutral?

I just recently installed a 50A two pole GFCI circuit breaker that was part of a 240VAC spa panel. For 50A I was using 6 AWG wires. When connecting up this type breaker you connect the two poles of ...
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42 views

Is it advisable to run a snow blower on a non-GFCI receptacle?

Is it advisable to run a snow blower on a non-GFCI receptacle? After all, while using the machine I will always be wearing mittens and boots. Would these not provide sufficient safety?
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10k views

What does it mean when one wire goes into load, and one goes into line

I am replacing my kitchen outlets with GFCI. The inspector told me I just needed to install one at the first outlet in the circuit. I looked at the outlets on either side of my kitchen; at one end ...
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45 views

GFCI in garage keeps tripping when I turn on kitchen lights

The GFCI outlet in my garage keeps tripping whenever we turn on the kitchen lights. When it trips, two cable TV boxes in the living room and one bedroom also lose signal. I press the button ...