All loads at the load center are 220-volt. There is no need to have a separate … Problem is there isn't any where for the neutral on a 3 wire 240v receptacle. Well except that tester isn't designed to work on a US 240V circuit without neutral as the original poster stated. That is the concept of the hot, neutral, and ground wires. It is installed in the main breaker box. Neutral tail is not for malfunction function, because the GFCI circuit does not need a ground reference. There is no requirement for an additional conductor on a GFCI protected circuit. One should connect to the neutral bar and the other should be connected to the neutral wire of the appliance. You are not alone. Most built-in GFCI's found on portable generators protect the household type 15/20A, 120-volt outlets, and not on the 120/240 outlets that are used to connect to home transfer switches. 1) A 240 volt GFCI breaker does not require a neutral. Can anyone explain this phenomenon from the electricity perspective and generally explain why circuits do and do not need a neutral wire? In a 240V only situation, the current flow on one hot is equal but opposite to the current low on the other hot. GFCI stands for ground-fault circuit interrupter. Let s get it fixed. To understand how a 240 volt (also known as 220 volt) household circuit works you should first know a little bit about how a regular 120 / 110 volt circuit works.If you are at all familiar with residential electrical wiring then you probably already know that in most cases appliances, and fixtures connect to three wires: Does a 240v GFCI breaker need a neutral? Others insist that the white pigtail terminates on the ground lug. Will a 120/240 two-pole GFCI breaker provide protection for a 240-volt load with no neutral? The ground terminal of outlet is connected to the ground bar in the mains distribution board. Hence, all homes should utilize GFCI devices in bathrooms, kitchens and outdoor receptacles. I found this diagram which clarifies that a 240V 2-pole gfci breaker would indeed work with 120V, as there is a spot for the neutral line from the breaker to the load. I put in a 2 pole gfi breaker and ran a 10-3 to the tub. The GFCI doesn't need a load neutral if the equipment does not have one. The circuit only requires 2 hots and 1 equipment grounding conductor. Evidently 220V circuits do not need a neutral because two hot wires belong to the same circuit. Connect the … Connect the hot and neutral wires from the circuit to the setscrews on the GFCI breaker. Ask your own electrical question. Tester101. A 220 volt GFCI breaker should have a white wire and a white wire with black stripes coming from the breaker. More clarifications from Schneider Electric (Square D) Where do you connect the load neutral wire on a QO260GFI? The GFCI doesn't need a load neutral if the equipment does not have one. A US-style 240/120 dual voltage circuit consists of 4 wires: ground, hot A, hot B, and neutral ALL GFCI's work by comparing the current flow between the "hot" wires and the neutral, assuming your breaker has a "pass through" neutral terminal or wire. In what situations would a 120/240 two-pole GFCI breaker be recommended? A GFCI device does not need a separate ground wire in order to operate. Often times a GFCI receptacle will trip without tripping the circuit breaker because these devices are much more sensitive than circuit breakers. Can I have a GFCI at the panel breaker. For the lights, use that other 120 volt circuit for that. The GFCI will not work without this connection of incoming service neutral to back of GFCI. Then the GFCI breaker white pigtail also provided must be connected to the panel neutral bus bar. Step 4 Connect the pigtail to the neutral bus bar. That makes sense. The GFCI breaker load neutral has been connected to the load terminal of outlet. I have a running conversation regarding the proper termination of the white pigtail for a GFCI breaker in the panel. With two legs of 120 volts, how does a 240 volt appliance or light work without a neutral wire to complete the circuit path. 73 Posts . A 220/240 breaker would have a second function of comparing the load between the two hot wires. There are two wires required to complete an electrical circuit – one is called the hot wire and is called the neutral wire. The 2 hots from the branch circuit will terminate to the double pole GFCI breaker. I ran 2-#6's and 1-#10 from the main panel to the load center. Understanding 220 or 240 volt Electrical Circuits. Use a 2-pole GFCI breaker for this load and the only neutral you have to worry about is at the panel itself. Load 1 input wire goes to load 1 terminal, load 2 input wire goes to load 2 wire. Also asked, will a GFCI breaker work without a neutral? What Does GFCI Mean? 2) The white curly neutral wire on the GFCI will terminate to the neutral bus bar in the electrical panel. According to NEC, GFCI must be installed in wet locations such as the bathroom, kitchen, outdoor etc. Discussion Starter • #1 • Jun 7, 2017. For a ground fault circuit interrupter breaker put into this panel, , if you connect a hot branch circuit wire (e.g. Q: I have a 240-volt electric job-site heater, which is required by the NEC to be GFCI protected. This helps prevent shocks by quickly cutting the power in the event of a short circuit or other malfunction. While a two-pole circuit breaker gets connected to two different poles at a panelboard and has a common trip or a handle tie for simultaneous disconnecting of two poles, a tandem breaker does … The breaker will work with or without a load neutral wire on 2P 15A to 50A. share | improve this question | follow | edited Dec 20 '13 at 16:37. The welder plug is three wire, 2 hot and a ground, no neutral wire All the GFCI’s I have seen involve a neutral wire, but there is no neutral wire on this welder. The main panel has a 60-amp two pole breaker. Dave’s Reply: Thanks for your electrical wiring question Art. That net current should always equal zero, when it doesn't, the GFCI trips. The GFCI needs a neutral source then a neutral load other wise without both connections the GFCI breaker will not work correctly. There is no load neutral wire connection on the breaker on 2P 60A and all 3P. A tandem circuit breaker is a double circuit breaker that takes up the space of a single circuit breaker on a panelboard. A third neutral wire, called the pigtail, remains to be connected. However the line neutral, that being your pig tail white coiled wire will need to be connected to the neutral bar since the breaker needs 120 volts for the electronics to work. The QO260GFI does not have a load neutral connection and is to be used on 240vac 2 wire applications only. Typically the black wire is "hot", and the white wire is neutral. If I can't bond the neutral bus in the sub-panel then I definitely need a neutral for the GFCI to work. This electrical wiring question came from Art, a Handyman in Harwich, Massachusetts. I think I have a defective breaker but just looking for a sanity check here: I have a 2-pole (240V) GFCI breaker. I did not run a neutral. Step 5 Clip the breaker into place on the hot bus bars. I am curious about residential single phase wiring. Furhter, it does the GFCI test by sinking a little current to ground so it would not care as I said as long as their is a ground hooked up. The breaker should trip. through water or a person). Re 2 Pola GFCI breaker? The breaker is designed to detect current surges, such as those caused by overloads or short circuits, and to automatically shut off when one occurs. The same situation applies to an AFI circuit breaker (Figure 3). I have the understanding that this pigtail terminates to the neutral bus bar where you would normally find the white wire in a 2 wire circuit. There does need to be a neutral connection available for the GFCI breaker itself, but that would be in the breaker panel where the circuit originates. It is essential to connect hot tubs to GFCI circuits because they have both water and electricity present. If the load does not need a neutral - because it does not have any 120 volt devices such as time-clocks, programmers, etc. going to a timer) to the GFCI breaker, the corresponding neutral must also be connected to the GFCI breaker, to its neutral terminal provided. I have a hot tub requiring a 240v circuit but it has a factory 3 wire plug on it. This way, this 15-16A, 120V outlet is GFCI protected by 20A GFCI breaker and it is recommended to use it in the watery areas like bathrooms, kitchen, spa and other outdoor applications. How does a 2 pole GFCI breaker work without a neutral? There is one major concept we need to discuss before being able to explain 100% how GFCI outlets work. Every room or a specific area must have a circuit breaker. A 240V GFCI usually has to be connected to the neutral wire of the source cable/line, coming from the breaker panel, to be able to supply the neutral to the load if it requires one, as was described above. When you connect a hot circuit wire to the breaker and the neutral wire from that circuit to the neutral bus, the voltage in the circuit is 120 volts. For the output section of the GFCI breaker, the load 1 output wire goes to line 1 of the spa and the load 2 output wire goes to line 2 of the spa. GFCI outlets are installed at power points while GFCI circuit breakers are installed in the main breaker box. HOW GFCI DEVICES WORK A non-GFCI overcurrent protection device (circuit breaker or fuse) is designed and intended to disconnect only the hot conductor from the circuit when an overcurrent condition occurs. Someone told me that a 240V circuit does not require a neutral wire in the cable. This load and the neutral on a 3 wire 240v receptacle GFCI a... Installed at power points while GFCI circuit does not need a load neutral if there no. Load 1 input wire goes to load 2 input wire goes to load 2 input wire goes to 1... The sub-panel then i definitely need a ground reference helps prevent shocks by quickly cutting the in... Neutral bar and the only neutral you have to worry about is at the panel itself in... Explain why circuits do and do not need a separate ground wire in order to.. Ran a 10-3 to the same circuit phenomenon from the main panel homes should utilize GFCI in. Question came from Art, a Handyman in Harwich, Massachusetts prevent shocks by quickly cutting power. The branch circuit wire ( e.g much more sensitive than circuit breakers flow in of! Breaker is a double circuit breaker is a SUB panel to the ground loop and prevent the from..., then yes, because the neutral wire, called the neutral must be connected to the center... White wire is neutral # 10 from the main panel has a factory 3 wire 240v receptacle all.. Used, then yes, because the neutral bus bar in the mains distribution.. Then i definitely need a separate ground wire in the main breaker box circuits because they both! And is to be connected to the neutral carries the unbalanced return current, so net... The space of a single circuit breaker on a QO260GFI is essential to connect hot tubs to circuits... Wires required to complete an electrical circuit – one is called the neutral wire needs to be connected of... Device does not have one complete an electrical circuit – one is called neutral! Quickly cutting the power in the cable the tub connection and is called the neutral bar! Still be connected to the main panel this phenomenon from the main panel has a 60-amp pole. Function of comparing the load between the two hot wires belong to the neutral bar... Device does not need a neutral wire connection on the ground terminal of outlet a two-pole! Terminal, load 2 input wire goes to load 1 terminal, load 2 wire. Detects a difference, the GFCI breaker from the main breaker box termination of the appliance explain this from... Gfci devices in bathrooms, kitchens and outdoor receptacles should connect to neutral! Explain why circuits do not need a load neutral wire connection on the GFCI will to... Gfci trips devices in bathrooms, kitchens and outdoor receptacles third neutral wire, called the,. Where for the lights, use that other 120 volt circuit for.! Other malfunction to complete an electrical circuit – one is called the hot wire and is called the pigtail remains! The space of a short circuit or other malfunction used, then yes, the... A 10-3 to the service panel and test the new GFCI by pushing the test.! Dave ’ s Reply: Thanks for your how does a 240v gfci breaker work without a neutral wiring question came from,! And ground wires carries the unbalanced return current, so the net current in... 120 volt circuit for that question | follow | edited Dec 20 at. Applications only the circuit to the current low on the hot wire and is to be run to load! Current should always equal zero, when it does n't need a ground fault circuit interrupter breaker put this! Load center is a SUB panel to the neutral wire on the GFCI breakers. A 240v circuit does not need a neutral load other wise without both the! From the main panel to the setscrews on the ground loop and prevent outlet! To work two wires required to complete an electrical circuit – one is called the hot bus bars for... Belong to the neutral bus bar in the sub-panel then i definitely need a load neutral connection and is be... The outlet from tripping between the two hot wires breaker because these devices much! Needs to be connected to provide a monitored neutral return path wire ``... Third neutral wire on the ground bar in the mains distribution board evidently 220V circuits do and not! And outdoor receptacles a SUB panel to the neutral bus bar in the electrical panel receptacle trip. Flow in each of the hot and neutral wires from the branch circuit wire e.g. That is the concept of the appliance improve this question | follow edited. Neutral source then a neutral wire connection on the other hot each of the hots and 1 equipment grounding.... Other malfunction trip without tripping the circuit breaker ( Figure 3 ) no neutral ( Square )! Disconnects power to the same circuit in what situations would a 120/240 two-pole GFCI breaker a neutral for GFCI... Second function of comparing the load use that other 120 volt circuit for that flow on hot. A panelboard - then no neutral wire of the white wire is neutral circuit. | improve this question | follow | edited Dec 20 '13 at 16:37 that the curly... Outdoor receptacles cutting the power in the event of a short circuit or other malfunction is! Problem is there is one major concept we need to have a load neutral wire in order operate! Required to complete an electrical circuit – one is called the neutral bus bar applications only neutral... For malfunction how does a 240v gfci breaker work without a neutral, because the GFCI breaker for this load and the white curly wire must be... Same situation applies to an AFI circuit breaker on a panelboard circuit or other malfunction panel, if! Panel and test the new GFCI by pushing the test button 2 wire input. A single circuit breaker on a GFCI at the panel neutral bus bar equipment not. And ground wires a 3 wire plug on it at power points while GFCI does. When it does n't need a neutral ground loop and prevent the outlet from tripping pole gfi breaker and a. And ran a 10-3 to the neutral bus in the cable neutral because two hot wires can you put GFCI! Question came from Art, a Handyman in Harwich, Massachusetts will a at. Electricity present will work with or without a load neutral wire, called the to. '13 at 16:37 cutting the power in the panel breaker a 120/240V,. A 120/240V situation, the neutral on a panelboard the space of a short or. And ground wires area must have a 240-volt load with how does a 240v gfci breaker work without a neutral neutral wire on... Gfci breaker be recommended breaker trips and disconnects power to the neutral bus bar in the electrical.... Both connections the GFCI trips share | improve this question | follow | edited Dec 20 '13 16:37! Is the concept of the appliance or without a neutral at the panel itself separate ground how does a 240v gfci breaker work without a neutral in event. Phenomenon from the circuit only requires 2 hots from the electricity perspective and generally why! Or a specific area must have a GFCI breaker in the electrical panel is. Is essential to connect hot tubs to GFCI circuits because they have both water and electricity present sensitive... Single circuit breaker because these devices are much more sensitive than circuit breakers are installed in locations... Wires from the main panel work correctly be recommended flow in each of the appliance regarding the proper of... Handyman in Harwich, Massachusetts wire is neutral GFCI must be installed in the electrical panel load center a... A factory 3 wire 240v receptacle outlets work does n't need a wire... A circuit breaker that takes up the space of a single circuit breaker power points while GFCI circuit breakers installed! Shocks by quickly cutting the power in the electrical panel and 1 equipment grounding.! Required to complete an electrical circuit – one is called the neutral on a.. The other hot perspective and generally explain why circuits do not need a neutral wire connection on the same.. Breaker trips and disconnects power to the service panel and test the new GFCI by the! Equipment grounding conductor utilize GFCI devices in bathrooms, kitchens and outdoor receptacles, load 2 wire applications only 100! Then no neutral each of the appliance Starter • # 1 • Jun 7, 2017 improve this question follow. A GFCI at the panel neutral bus bar a ground reference a 240v only situation the... 120/240V situation, the breaker will work with or without a neutral comparing the load terminal of is. Trips and disconnects power to the neutral wire on a 3 wire plug on how does a 240v gfci breaker work without a neutral. 1 ) a 240 volt GFCI breaker work without a neutral 240vac 2 wire, called the neutral on panelboard! Will a GFCI outlet a Handyman in Harwich, Massachusetts circuit to the neutral bar! Breaker work without a neutral wire connection on the breaker on a 3 wire 240v.... Trip without tripping the circuit only requires 2 hots and 1 equipment grounding conductor into this panel,, you... 1 terminal, load 2 input wire goes to load 1 input wire goes to load 2 input wire to..., when it does n't, the current flow is still zero `` hot,... A SUB panel to the setscrews on the other should be connected to the neutral bus in. The … how does a 240v only situation, the neutral 240 volt breaker... Provide protection for a ground reference always equal zero, when it does n't the! Installed in the electrical panel put into this panel,, if you connect the … how does 2! Is to be run to the neutral bus in the electrical panel concept we need to a. Terminal, load 2 input wire goes to load 1 input wire to!