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

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31 views

GFCI protect "load side" without ground? [duplicate]

I have an old house with a lot of knob & tube (and some sort of slightly newer but still ungrounded) wiring. The previous owner replaced most outlets with 3-prong ungrounded. To improve safety I ...
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33 views

GFCI outlet no LED light, but with power, downstream no power

I have a GFCI outlet in the kitchen that shows no LED color status, cannot reset but still has power, but no power downstream. Does it mean I have a bad GFCI outlet and need to replace it? or I need ...
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38 views

Replace old armored bx with new or convert to Romex in this instance?

I wanted to install another outlet box on the opposite side of this wall. This outlet is 15A and grounded via the metal box and BX cable (verified with GFCI outlet tester before disassembly). Upon ...
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New GFCI trips when load wires installed

I moved into a new house recently. One of the outlets was a 2-prong, ungrounded receptacle. I wanted to install a GFCI so I could plug in 3-prong devices. The old receptacle had 2 hot, 2 neutral and ...
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What kind of breakers might work in this panel? [duplicate]

I want to install a double pole 30 amp GFCI breaker in this panel, but I can't figure out what kind of breakers I need. Is there a way to tell from the pictures I have attached?
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New GFCI outlet shows hot/neutral reversed either way I attach old 120V power line

Some circuitry in my old house is just two wire w/o ground and as I'm renovating I replace these outlets with GFCI if I'm not pulling two wire w/ground. I've found such an outlet that shows HOT/NEU ...
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541 views

No power after replacing GFCI outlet

We just moved into our home and the previous owner upgraded the master bathroom. There is a fancy toilet that has features that require electricity, a heated floor, a heated towel rack that never ...
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Upstream GFCI trips regularly with new microwave use

Moved into a new house in 2019 and installed a new microwave right off the bat. Found out that using the microwave (a new Samsung) trips the upstream GFCI maybe 5% of the time. Weird thing is that ...
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test GFCI tripped circuit in garage, would not reset, then power came back by itself later

In the garage, I've got two wall GFCI outlets, some other non-GFCI wall outlets, several overhanging lights, and a garage door opener. The conduits from these all comes together in a couple junction ...
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69 views

How can there be voltage in this electrical configuration. Is there a short?

I'm having a hard time understanding this electrical setup. I was wiring a GFCI so I decided to test to see which was the line and load. I have a switch that seems to control two boxes mounted to my ...
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97 views

2 white wires and 1 black wire in an outlet box?

I installed a GFCI in a bathroom that seems to trip when I turn on the hall light, which has 3 separate switches? I looked at the outlet box closest to the one light switch under the premise that this ...
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477 views

How to tell whether a breaker panel can meet certain electrical requirements

I am a homebrewer and am planning on buying a fancy new piece of brewing equipment for my basement brewery. The electrical requirements of this equipment are as follows: 4 wire, 240V line for power ...
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55 views

Adding GFCI to existing 5 wire GFCI

I searched for similar but didn't find anything after a quick search. I have an existing GFCI with 12 gauge wire coming off 20 amp breaker. I want to add another gfci for an outdoor kitchen. Can I ...
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Tee or split GFCI circuit in garage (120v) - Practical and Code question

Relevant but didn't address the GFCI part of the question: Split a single branch circuit into two runs? I'm wondering if I can split/tee/branch an existing circuit that uses wall mounted metal conduit....
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Can/should I change GFI outlet to standard outlet

I am having my retirement house built. The house includes two RHEEM RTG-84DVLN-1 tankless water heaters that are plumbed in parallel. The instructions state do not hook up tankless to a GFI outlet ...
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Does the switched load on a GFCI switch need to be grounded?

I'm in a similar as situation described here: Can a mud ring be used in reverse? I have an octagon box outside behind stucco. I want to plug in string patio lights. The lights have a 3 prong plug. So ...
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Two-wire remediation: GFCI outlet vs. Breaker, and what about three-wire cords?

My house is old, and much of it has the original knob-and-tube. A prior owner rewired the 'wet' areas (kitchen, bathrooms) with new, grounded, wiring. Adding GFCi protection to the remaining two-wire ...
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Wiring for switched NEMA 6-20R and 5-20R in same box in garage

My goal is to have 20A receptacles in a particular spot in my garage dedicated to power tools (such as saws) whose motors can be configured for either 240V or 120V, with a switch as a handy second ...
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64 views

Where are the two pole CAFCI/GFCI breakers?

Why aren't there very many (any?) two pole dual function breakers? Is a GFCI + CAFCI breaker less useful for 220 or MWBC? Is it be prohibitively expensive? Or is there no demand because not many want ...
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I'm trying to wire a box that has 3 lines coming in from the top, one light, one fan, and I'm assuming the 3 rooms upstairs is the 3rd no more room

So, the three existing lines coming into bathroom are light, fan, and upstairs lights and of course the bottom is the main. I have a double switch(like 2 light switches on one, and gfci plug.. putting ...
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717 views

Brand new dishwasher tripping GFCI breaker

I bought a house that did not have a dishwasher installed (the seller gave a good rebate because of that). I have no experience installing these things, so I was searching for a handyman to do the ...
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Is downstream outlet GFI protected if it doesn't trip?

Working in an 80+ year old house in which the circuit wiring is not necessarily always logical and there are no ground wires. One circuit runs to two outlets in the study on the first floor, then up ...
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5answers
3k views

Mark an outlet as not GFCI protected?

My garage has a workbench installed by the previous owner. Just above the workbench are a light switch and a set of four outlets. They originally looked like this (this is a lazy visual diagram, not a ...
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3answers
70 views

GFCI Trips immediately after energizing circuit

I am not an electrician, however used to work for an electrical engineering firm so I’m pretty familiar with electrical circuits. Having said that I purchased a home where the previous owner had done ...
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58 views

Are GFCI receptacles required on circuits (eg bathrooms or outdoor receptacles) already protected by AFCI circuit breaker in main electrical panel?

New home build in Canada. Most wiring is protected via AFCI breakers in main electrical panel (EP). One out of 6 outdoor sockets is a GFCI socket - remaining 5 are normal sockets wired to AFCI ...
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75 views

Why do I read 70 and 50 volts at a GFCI outlet?

I've got two wires coming in from supply to what was a GFCI receptacle; a black and a white with black tape. If I measure across one to ground, I get 70v, and the other, 50v. There are two other ...
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4answers
642 views

15 amp GFCI breaker in multiple rooms

We recently moved into a newly constructed apartment (6 months old) and have an issue I have never dealt with until now. Day of move in we had all the lights on in our 3 bed 2 bath apartment. Due to ...
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3answers
336 views

Rewire outlet circuit: Location of outlets, wire run alternatives, GFCI best practice, and outlet spacing

I am rewiring a circuit. This circuit is a mix of knob and tube and older Romex. It only has a hot and neutral, so no dedicated ground. However, the outlets are three-pronged. There is no GFCI on ...
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1answer
48 views

Faulty GFCI Load

I have a pool side GFCI outlet. I am sure that the LOAD from GFCI goes to pool light switch. I have connected the backyard string light to this outlet. However since connecting string lights, the GFCI ...
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2answers
90 views

GFCI in kitchen

I have a double gang in my kitchen. I dont know where the wires come from but one lead to the old plug and another to a switch (which I believe is set up for 3 way). I am now replacing the old plug ...
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3answers
252 views

Using smart switch to control GFCI outlet

I have a bunch of outdoor outlets which are all connected to a single GFCI and controlled by a standard light switch inside the house. I recently replaced the standard light switch with a lutron ...
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43 views

Pigtail Line Side of GFCI

Is it O.K. to put a pigtail on the line side of an outdoor GFCI to power an irrigation pump (via relay)? The outlet would be used for the irrigation controller and misc. outdoor electrical items. The ...
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651 views

Is there a problem with using a dual function breaker when a CAFCI would suffice?

I am upgrading a handful of breakers - a couple of circuits with lighting need CAFCI and two with outlets need GFCI (I am going with dual function breakers rather than GFCI outlets). I have two ...
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1answer
879 views

Garbage disposal has strange switch wiring

Could use some help on this one—I've wired plenty of outlets and switches, dimmers, 3 way, etc. but this one stumped me. I need to replace the old switch on my garbage disposal, and I assumed I'd be ...
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2answers
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60V on disposal switch, and fridge controlled by a GFCI?

The house I'm renting has a very old (fire-prone) Zinsco panel. There are only 7 breakers for the entire house, and shared neutral multi-wire branch circuits all over the place. At the moment, breaker/...
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56 views

Dead circuit, breaker not tripped, one gfci in the circuit and it is not tripped

I have a few dead outlets in my house and also two also dead outside, all on the same circuit. Circuit breaker at the panel is not tripped. When I press the test button on that breaker at the panel ...
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4answers
778 views

How do I keep a GFCI outlet with tight clearance from shorting inside a steel electrical box?

I was replacing outlets and faceplates in my kitchen, finding mostly original electrical boxes or blue old-work boxes, and everything was going fine until I tested a double-gang GFCI outlet and outlet ...
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1answer
71 views

GFCI breaker on a MWBC (Shared common)

We are doing kitchen reno. We had to replace the main breaker panel. Local code requires we use arc fault breakers. This is not an issue for most of the project, however, the inspector is insisting ...
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84 views

Need a GFI that will notify me remotely when it is tripped, and let me reset ist remotely [closed]

I travel frequently and have a GFI that goes off occasionally - average 1-2 times a month. Reason it goes off is that it has a circuit that is wired underground and I don't want to go to the expense ...
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62 views

GFCI Mystery Wiring? Odd outages

I've got a house where lots of duplex sockets are wired through a single Ground-Fault Circuit Interrupter (GFCI) I'm pretty sure this is the appropriate diagram. There is a GFCI socket on the inside ...
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1answer
52 views

Can't reset or turn GFCI switch on. What could be wrong?

Needless to say I'm not an electrical expert. I would pay someone but the cheapest someone will charge where I live is 200 just to come out and see it. I feel like it is something easy I could ...
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1answer
51 views

GFCI tripping when circut is off at breaker - is there a short?

I have a shed wired up with a fuse box with a main breaker, GFCI safety switch, breaker for light circut and breaker for outlets. The fuse box is wired with a common ground and neutral on a bar ...
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6answers
2k views

Do my exterior GFCI outlets really need to be on their own circuit?

I am selling my home and the buyers had an inspection done where the inspector listed the exterior GFCI outlets as a safety hazard because they weren't on their own circuits. These outlets were ...
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1answer
139 views

Gen on backfeed breaker won't power GCFIs

I've been doing research online to try to help me narrow down things. Here's what I've got: I bought a small (3500W) generator with a floating neutral. It has a 120v 3wire TT30 receptacle. No special ...
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27 views

2 GFCI connected

I had 2 parallel GFCI outlets installed in the kitchen (Each one is on a separate fuse to the main box). The Green lights are on solid..but every, now and then... maybe 10 seconds or so, the Red light ...
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1answer
114 views

Power outages trip 100% of new GFCI outlets but 0% of original GFCI outlets. Why?

I recently remodeled a SoCal home built in 2014. We added some new GFCI outlets and there were already some existing GFCI outlets. There are occasional planned outages here and when the power comes ...
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2answers
126 views

GFCI receptacle connected to Multi-Wire Branch Circuit

I have a Multi-wire branch circuit & would like to connect GFCI receptacles. The MWBC currently powers dimmable LED lights in basement. In process of finishing basement. I would like to extend ...
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2answers
91 views

Installing a GFCI with wires from "line" to "line" instead of "line" to "load."

I don't know the proper terms so please bear with me. But here's the scenario. We have a second refrigerator in our garage. It plugs into a standard looking outlet. But it is wired from another outlet ...
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2answers
98 views

GFCI used to stay tripped for many hours, now fully dead

Electric Panel---20A Circuit Breaker---GFCI (Kitchen)----Load1---Load2---Load3---Load4 The first floor wall on which GFCI and Load1,2,3,4 installed was affected by laundry water very minor leakage ...
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2answers
114 views

2 outdoor outlets connected to one GFCI controlled by a switch inside

I want to add two outlets(front/back yard) I have a working GFCI in front yard--is it feasible to add another outlet for back of house? Both controlled by one switch--switch off--all dead/switch on-...

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