A homeowner in Florida walked into an electrical supply and asked for a “GFI outlet” for his bathroom. The salesclerk handed him a box labelled GFCI. The homeowner was confused as he had been told by his electrician to buy a GFI, but here he had GFCI. Were both the terms same? Which device was better? And was he given the wrong product? The clerk explained what every electrician knows but very few homeowners realize — that GFI and GFCI actually refer to the same device. Both the terms refer to the same ground-fault protection technology, the same sensing mechanism and the same life-saving function. The only difference is the name on the box and this difference has more to do with the history and marketing than with the technology itself. Knowing why there are two different names for the device and when that distinction is important to ask the electrician is a small piece of informational literacy that can avoid miscommunication at the supply house.
Résumé : GFI or Ground Fault Interrupter and GFCI which is Ground Fault Circuit Interrupter are protective devices that function in the same manner. Both are designed to detect ground faults, which means the current is flowing to the ground through a person or water. It will break the circuit in milliseconds in order to save from the electric shock. The word GFCI is the one used in the National Electrical Code and in the specifications of the manufacturer and in the device as well. The word GFI is just the short word. There is no difference in the working or wiring or performance of the device that has been referred to as GFI and the one called GFCI. In other words, both are the same and provide the same ground fault protection of 5milliamp. In other words, whatever outlet you will buy, either GFI or GFCI with the feature of TEST and RESET button, be assured of the standards that need to be maintained in bathrooms, kitchens, garages etc.
What GFI and GFCI Actually Stand For — and Why Both Names Exist
Disjoncteur différentiel (GFCI) This term denotes Ground Fault Circuit Interrupter, which represents the full and correct name of the instrument itself. This term can be found in the National Electrical Code (NEC) established by the National Fire Protection Association (NFPA), in the installation instructions of any manufacturer, and also on the instrument called. The term circuit used in the name is crucial; since the device interrupts the complete circuit when identifying a ground fault, not only a part of it. GFI means Ground Fault Interrupter, which is a shortened version of the name. The term GFI is often used in conversation, as electricians prefer saying this word instead of GFCI due to the fact that it is one syllable shorter. The term is also used for older products and is present in manuals as well as on various blog posts. However, there is no difference between the devices called GFI and GFCI.
What accounts for the dual usage of the name? The reason is historic and practical. When ground-fault protection was first incorporated into residential electrical codes in the 1970s, the technology was unfamiliar and the name was still evolving. At this time both GFI and GFCI appeared in the literature. Over time, however, the NEC together with the manufacturers agreed to use GFCI as the correct term. Nevertheless, GFI was already present in the electrician’s everyday vocabulary and it remained there. Therefore, today any homeowner searching for GFI outlet or GFCI outlet online will be able to find the same products.
The One Narrow Distinction: GFCI Breaker vs. GFCI Receptacle
Sometimes, the GFI and GFCI blunder is made more complex by a distinction that is related but involves something else: the distinction between GFCI circuit breakers and GFCI receptacles. Some people use the term GFI to describe a GFCI breaker found in an electrical panel and the term GFCI to describe the GFCI receptacle found on a wall. This is not a standard use of terms. In both cases, the terms GFCI or GFI are equally correct in law. A GFCI circuit breaker is installed in the service panel and offers ground-fault protection to all devices powered by that particular circuit. It can only be reset in the panel. The GFCI receptacle, on the other hand, is installed in a wall box and provides ground-fault protection at that particular point and the points wired downstream from the LOAD terminals. It can also be reset by pressing the RESET button found on the receptacle. Both the circuit breaker and the receptacle will detect the same ground fault at the same 5 mA threshold and interrupt power to the circuit almost instantly. The only difference between them is related to their location and the branch circuit they protect. Our detailed guide on the différence entre les réceptacles GFCI et les réceptacles ordinaires covers both the receptacle and the breaker types, their installation requirements, and their respective applications. For a complete comparison of the GFCI breaker and the GFCI receptacle — installation, protection, cost, and convenience — our article on the differences between GFCI circuit breakers and GFCI receptacle outlets provides a detailed, side‑by‑side analysis.
How to Identify a GFCI / GFI Outlet — and Confirm That It Works
Finding a GFCI outlet takes an instant. Look at the face of the receptacle. If there are two buttons there — TEST and RESET — then it is a GFCI outlet. The buttons indicate that the outlet is a GFCI outlet. In addition, there may be a label stating “GFCI” somewhere on the body of the device, but the buttons are what make the identification evident. If there are no TEST and RESET buttons, this does not mean that the outlet cannot be GFCI-protected: it may be wired downstream from a GFCI receptacle, or use an upstream GFCI circuit breaker, but then it is not a GFCI by itself. It is also possible to determine if the outlet has GFCI protection if you can press the TEST button on the recognized GFCI located upstream. If the outlet you are inspecting loses power, it is GFCI-protected.
Both the National Electric Code and manufacturers of GFCIs mandate monthly testing of GFCIs utilizing the TEST button. Pressing TEST will produce a clicking sound and disconnect power from the GFCI receptacle and all other upstream outlets; pressing RESET will restore the power to the circuit. A GFCI that does not trip when TEST is pressed or that does not reset must be replaced, even if it still provides power. A GFCI that is still providing power represents a hidden danger, which is why it is so important to utilize the TEST button frequently.
What a GFCI / GFI Outlet Costs and How to Choose the Right One
The price of a GFCI outlet, whether it is called “GFI” or “GFCI”, varies based on the brand, type, and amp rating of the outlet. A regular 15‑amp tamper‑resistant GFCI receptacle sells for $10 to $20. The 20‑amp model costs between $15 and $25. Weatherproof GFCIs for use outdoors would cost between $15 and $30. A GFCI with USB‑C charging ports would be priced between $25 and $50. An AFCI GFCI would cost around $30 to $60. A GFCI circuit breaker is sold between $40 and $80. The price difference between a basic GFCI and a good non‑GFCI tamper‑resistant outlet ($2 to $5) makes for the ground fault protection costs a few extra dollars so you can have a device to save you from electric shock. GOG Electric makes GFCI outlets in both 15 and 20 amp versions with tamper resistant shutters, white and decorative finishes, and with TEST and RESET buttons that all GFCI outlets come standard with. For the full range of receptacle types and their applications across every room, our overview of the meilleures prises et interrupteurs pour les maisons modernes covers the complete selection from standard to smart.
Questions fréquemment posées
Can you put a GFI on any outlet?
A GFI/GFCI receptacle can be installed in any 120-volt branch circuit rated at 15 or 20 amps with a ground wire (or it can be installed with a GFCI breaker, in which case there will be no need for another GFCI receptacle). The GFCI receptacle itself has to be placed in a box of appropriate depth, and the cables should be connected to the LINE connectors for the power connection, as well as to the LOAD connectors if you wish to have protection located downstairs.
What should not be plugged into a GFCI outlet?
Typically, appliances like refrigerators, freezers, sump pumps and sewage ejector pumps are not suggested for GFCI protection since it can trip unnoticed and lead to incidents like spoilage of food or basement flooding. In case the area mandates GFCI protection such as in a garage or unfinished basement, it is best to get GFCI with alarm to detect tripping or a GFCI with single outlet for a particular machinery so that it does not affect others when tripped.
What happens if you put a GFI on a GFCI breaker?
Putting in a GFI/GFCI outlet on a circuit that is already under the protective cover of a GFCI breaker creates a situation where protection essentially is redundant. In the event of an occurrence of a ground fault, it can be any of the two devices that may trip first. The redundancy is not dangerous and does not violate the NEC, but can complicate troubleshooting.
Do bathrooms need GFCI or GFI?
Bathrooms are a GFCI protected area, regardless of whether there is a GFCI circuit breaker, a GFCI receptacle, or a GFCI receptacle downstream connected. The National ElectricCode has mandated GFCI protection in bathrooms since 1975. The Code may use the term GFCI in its definition, but a device termed GFI may also be utilized.
Références
- Association nationale de protection contre l'incendie (NFPA) — Article 210.8 du NEC. The specific code article that requires GFCI protection for personnel in bathrooms, kitchens, garages, outdoors, crawl spaces, and laundry areas.
- Electrical Safety Foundation International (ESFI) — GFCI Protection and Testing. Consumer and professional guidance on the role of GFCIs in preventing electrocution and the importance of monthly testing.
- Leviton — GFCI Receptacles et disjoncteurs. Manufacturer of residential GFCI receptacles and circuit breakers, with installation guidance and product specifications for all applications.
- Eaton — GFCI and Dual‑Function Protective Devices. Manufacturer of GFCI receptacles, GFCI breakers, and dual‑function AFCI/GFCI devices for residential and commercial installations.
La différence entre un GFI and a GFCI is a difference of three letters — “C-I-R” — that describe the same device, the same protection, and the same life‑saving function. The outlet on the wall with two buttons marked TEST and RESET is a ground‑fault circuit interrupter, whether the box calls it a GFI, a GFCI, or simply a “ground‑fault receptacle.” What matters is not the name on the packaging but the device inside it: the sensing toroid that compares the outgoing and returning current, the electronic circuit that detects a 5‑milliamp imbalance, and the relay that trips in a fraction of a second to disconnect the power before the current can reach a level that would stop a heart. GOG Electric’s GFCI receptacles — labelled GFCI, meeting the NEC’s requirements, and tested to the UL standards that govern their performance — provide that protection in every bathroom, kitchen, garage, and outdoor outlet that the code requires.
