This website uses cookies to improve your experience while you navigate through the website. At branch circuits, the voltage difference between the neutral conductor and the equipment ground (ground contacts of the receptacle) Since the ground and neutral are tied together at the circuit breaker panel, causing 0 volt ground->neutral there, the metric you want is the 3%. Here is what I do know: 1) The wiring maybe tied to an old two wire system, but the wiring in the box is 12-2 NM with ground. Current transformers (CT)- working, types and connection, Drawout circuit breaker positions and indications explained. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The voltage between any phase wire and neutral is 230 volts and between any two phase wire is 400 volts. For a better experience, please enable JavaScript in your browser before proceeding. I just had a similar problem. A neutral wire is a type of wire in which carries currents back to the source of power and or regular voltage. This is not hard for an electrician to do. Measuring for voltage across a closed switch (ON) will give you zero volts. In reality, the limit is around 1-2%. It depent on voltage difference between Vnw.r.tg and Vlw.r.tg at any perticular time t. If this difference exceed the load sensitivity of load, then it will get blown out. If both the grounding conductor and the neutral are connected at the panel you will not see phantom voltages between them. Web59K subscribers in the askanelectrician community. In a main panel, touching the neutral bus is not hazardous if your grounding and bonding are correct. In addition to reaching out to your local electrical contractor, consider reaching out to your local home inspection team. @ratchet freak Well I do agree on that. I'm not seeing loose neutral. This makes things like lamps and many appliances more safe to operate. 3 Is there a voltage between a ground and a neutral wire? All of them bully, degrade and terrorize those who hold opposing views and who peacefully express them. Answer: // To know the Linea-Neutral voltage of the press, the line-to-line voltage divided by three must be divided in the following way: V LN = 240V / 3, which will result in 138 Volts Neutral Line. However, you may visit "Cookie Settings" to provide a controlled consent. Ideally the neutral to earth must be less than neutral to earth 0V. neutral conductor and any metal part of the electrical system will be Bonus points for information on how number XX has been derived. The wire used in electrical distribution systems is usually made of copper. hb```e``PA2l,Vp`` YYyZ&{@q(6 hB12 4T?goOcgeQ1a"-]gfwl*ACGPv39=,u 2@ . How can I determine why all the outlets in one room are out? At panelboards, the voltage difference between the neutral conductor and the equipment grounding conductor (panelboard case) will Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. What you are measuring is just the drop voltage between ground at the neutral connection at your outside transformer connection and your local ground. If you continue to use this site we will assume that you are happy with it. The neutral wire provides a way for the appliance to use just one of the hot wires for 120V appliances like a clock or fan. 0 The voltage between the two legs (called phase to phase or line to line) is 240V and the phase to neutral voltage is 120V. How many volts should a light switch read? the switch had no power between neutral and hot but between ground and neutral have power but not ground and hot either. What is the drop voltage on a neutral wire? RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? %PDF-1.4 % What are the reasons for neutral to earth voltage being high? Applications of super-mathematics to non-super mathematics. Badly rusted electrical boxes or conduit (a tube or duct for enclosing electric wires or cable). Why does my neutral wire have voltage? this is because the ground is energized. Measuring AC voltage at the panel - why avoid measuring from neutral? Thanks for contributing an answer to Home Improvement Stack Exchange! Unbalanced loads may cause heavy neutral currents. These cookies track visitors across websites and collect information to provide customized ads. THis is safe. As implied by its name, this conductor provides a grounded connection for all appliances and equipment. 4 Answers. This lazy method results in both phases in the room using the same neutral to get back to the You should start to examine your wiring, if you measure anything near 3V neutral to ground. The service requires full cookie support in order to view this website. 0000145368 00000 n In a 3-Phase Supply system, the lower voltage (typically 277V or 347V) will be the Line to Neutral Voltage which is the measured voltage between one of the three lines and the neutral. 0000002653 00000 n The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data. Hosted By: WolfPack Advising. To learn more, see our tips on writing great answers. WebWhy do I have voltage between neutral and ground? The cost for an electrician to wire a whole house typically costs $8,000. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? @Tester101 At the plug, but I'm looking for general answer. This process is automatic. Because neutral is workin' for a living, and ground is not. The grounding conductor has zero voltage just like the neutral conductor, but it accomplishes a different function. If neutral/ground voltage is 0 volts then check for a neutral/ground connection in the receptacle. Under certain conditions, a conductor used to The best answers are voted up and rise to the top, Not the answer you're looking for? 0000044673 00000 n Thats why if you look at Transient Voltage Surge Suppressor (TVSS or just a surge protector) for home use, the specs should specify the level of protection through all modes including N-G. 123 volts hot to neutral/ground is fine, likely means youre physically closer to the substation, nothing at all to worry about. These cookies track visitors across websites and collect information to provide customized ads. Any thoughts? FPN No. In some cases, your electrician can mix neutral and hot wires. Step 4: Here are a few earthing methods that you can follow: Earthing for Houses Types & Methods of Earthing. At branch circuits, the voltage difference between the neutral conductor and the equipment ground (ground contacts of the receptacle) will be equal to the voltage drop of the feeder and branch circuit neutral conductors, which is 4.5 volts (3 volts feeder and 1.5 volts branch circuit). If I'm wrong, tell me why. I had an electrician over to add a new 240v outlet in my garage, he said that the neutral and ground bus bar wiring in that sub panel is reversed. but it could also be that voltage going through a light and trying to return to the electrical panel on the white, but not being able to get there due to an open neutral that is touching the bare metal of the can light or a ground wire. 0000001512 00000 n rev2023.3.1.43268. You are not a good ground. The cookies is used to store the user consent for the cookies in the category "Necessary". 86 volts between neutral and the electrical box? 0000205104 00000 n Shortening the length of neutral wire and increasing the sectional area of neutral wire can reduce the reactance of neutral wire and thus reduce neutral-earth voltage. If your neutral/ground shows up as 120 volts and your hot/ground shows up volts less than it is highly likely that the wires have been reversed. Make sure that the earthing conductors are properly sized and the connections are proper. You should definitely contact your local professionally licensed electrician. You should have on each end 3 wires hot/neutral/ground. Stray voltage occurs when electricity leaks from the black wire directly to the white or ground wires before passing through the device to be powered. Commentdocument.getElementById("comment").setAttribute("id","a41044df244df3a65ae9e65083b720af");document.getElementById("e3ea4ddf74").setAttribute("id","comment"); Earthing for Houses Types & Methods of Earthing, Potential transformers | Voltage transformers (PT), Ingress protection rating or IP rating (IEC 60529), Differences between resistance and resistivity, Factors influencing requirements for a good grounding system, Interview Question Variable frequency drives. How do you convert line to line voltage to neutral? Often times when we have new electrical or old electrical wiring done in our home, we trust that the electrician runs every wire correctly. :) It's just that some sources for example say that the voltage should be below 0.5 V (source claimed that exposing cows to Vgn higher than 0.5 V can impact milk production), others say that below 2 V is fine, some say that some computers may work up to 30 V and so on and so on. 240V in the UK is single phase with one live wire, one neutral (and always one earth wire). Improper earthing, caused due to loose earthing rods, wire breaks, or corrosion. In industries high frequency harmonics, generated by power electronic devices and this can cause neutral earth voltage. 2022 Atkinson Inspection Services. Such factors must be traced and fixed for the proper and safe operation of the equipment and the operator. Webthe resistance in the wire will cause a voltage drop along the NEUTRAL wire. Necessary cookies are absolutely essential for the website to function properly. By clicking Accept All, you consent to the use of ALL the cookies. Your local home inspection team can determine if wires and electric receptacles, as well as light fixtures, need a change. What happens if you connect neutral to ground? In a three-phase system with neutral, imbalance loading can cause neutral voltages. This causes the voltage between neutral and earth to be present. However, you may visit "Cookie Settings" to provide a controlled consent. These cookies will be stored in your browser only with your consent. Is there voltage between neutral and ground? There's interesting stuff here, but it's hard to understand due to the formatting and unexplained acronyms. You also have the option to opt-out of these cookies. The cookie is used to store the user consent for the cookies in the category "Analytics". Please read the question before answering. I understand, but what would lead to any voltage being present? Neutral-to-earth voltage can be caused by a number of factors, both in and around the farm. The breaker tripping upon initial power up shows that you had the power and ground wires touching somewhere in your newly installed wiring. In some cases, your neutral or ground wire might actually come out with voltage to it. The cookie is used to store the user consent for the cookies in the category "Other. Come join the discussion about trade knowledge, tools, certifications, wiring, builds, scales, reviews, accessories, classifieds, and more! I hoped that it would be obvious from the second sentence of the question, but it isn't. Another area to think about is making sure the metal box is grounded. The Fora platform includes forum software by XenForo. Since electricity takes the path of least resistance, would increasing the electrical resistance of the materials surrounding you sufficiently caus The white (neutral) wire should be connected to the silver-colored terminal. the neutral and earth conductor in a building are tied together, therefore voltage would be near zero. Learn more about Stack Overflow the company, and our products. 9 0 obj <> endobj is there a chinese version of ex. are patent descriptions/images in public domain? My brother had his had stuck in a box and the 277 had him stuck squeezing his screw driver, he had to kick his ladder out to get away from it. Making statements based on opinion; back them up with references or personal experience. Old cloth wiring can be deceitful and needs to be tested, sometimes the white wire cloth is dirty and looks black, people get hots and neutrals reversed sometimes because the white cloth wire is dirtier than the faded black one. The housing is still energized and ready to kill someone. 2 How much voltage is on the neutral wire? 0000002086 00000 n If I touch one lead to the exterior of the light and one lead to a piece of exposed ductwork, it reads 50 volts. Ensuring that all electrical systems are up to date is a top priority for your home inspection team. Lucky for you, this is a simple evaluation and inspection of your current wire situation. In this FPN, the limit is 3-5%. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. You did NOT indicate AMOUNT OF VOLTAGE. A critical part. Or where you Are getting the voltage. A VERY easy way to test all outlets is get a outlet The neutral wire allows the completion of the circuit and the switch to have power even when its turned to the off position when you want the lights off. Disconnect all 3 from the panel and all 3 from the receptacle (which you already did, but just clarifying for this test). Under load conditions, there should be some neutral-ground voltage 2 V or a little bit less is pretty typical. You have an open neutral. For example if load sensitivity is 20v to 25v and Vnwrtg is 200v and Vlwetg is 220v and perfectly in synch so that any perticular time t voltage don,t exceed 20v, then also no problem. feeders and branch circuits to the farthest outlet does not exceed 5 WebWhy do I have 80 volts on my neutral? If you touch the neutral to ground anywhere else, you will create the aforementioned Also the neutrals never are on the same bar as the ground wires in a sub panel, they must sit on a floating neutral bar, if using a regular panel tub as a sub panel you must remove the ground bonding screw from the neutral bar.so the metal panel and grounds are not touching the whites anywhere but back at the main panel. Practically in our 3-ph, 4 wire domestic supply system the loads are not perfectly balanced in all the 3 phases, so there will be currents through different sections of the neutral wire producing an impedance drop (ZI). A forum community dedicated to professional electricians, contractors, and apprentices for residential and commercial work. 0000136105 00000 n Under load conditions typically a 2 volt or less is typical. This Fine Print Note (FPN) says that to provide "reasonable efficiency of operation", the voltage drop of the branch circuit to the furthest point should not exceed 3%. Why am I showing 50 volts between neutral and ground? Analytical cookies are used to understand how visitors interact with the website. I wired 8 recessed lights to a switch in a room. Below are the few effects of neutral to earth voltages. It is recommended to maintain it below 3V. In practice, the limit is when things stop working. Make sure that the cable terminations at the panel board is proper and the gland plate is properly connected to the earth. If you want to check neutral and ground loads then check to see which is greater. So, for the neutral to ground measurement, you'll want half of the 3%. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". 0000024866 00000 n I wired 8 recessed lights to a switch in a room. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'electricalclassroom_com-box-3','ezslot_3',190,'0','0'])};__ez_fad_position('div-gpt-ad-electricalclassroom_com-box-3-0');Ideally, the voltage measured across the neutral and the earth/ground must be zero. Neutral-to-ground connection. Thanks for contributing an answer to Home Improvement Stack Exchange! BillW. Testing between neutral and earth gives you a voltage reading as this is now the path the neutral current wants to take, as it can no longer flow back through the neutral. Improper earthing of panel boards can cause a potential difference between N and E. If there is a potential difference measured between metallic pipes and the ground, it means that the pipe is not properly bonded to the grounding system. Asking for help, clarification, or responding to other answers. In other words, making the circuit longer or increasing the circuit current will increase the neutral to ground voltage. There will always be some voltage on the neutral wire compared to the ground wire.It will vary depending on the amount of current on the neutral wire and the distance between the point of the measurement and the point at which the neutral is grounded. Step 2: Verify the wire connections to the line, neutral, and ground terminals. 0000008321 00000 n What tool to use for the online analogue of "writing lecture notes on a blackboard"? Mine was and the problem was out at the pole. Residential 240V outlets usually have three or four connectors, which provide two hot 120V wires and either a ground wire, a neutral wire, or both (see Figure 3). Once the cause is traced, the problem can be solved. The best thing about being a "Conspiracy Theorist" is you have absolutely nothing to worry about myocarditis.. a) When I meter between the hot and neutral I get a voltage reading of 119VAC. As it is AC voltage Vnwrtg can be in synch or out of synch therefore can be addition or subtraction at time t and can vary. Still, if you can accidentally touch the neutral bus, you can accidentally touch the hot bus. (1) General. Why does my neutral read 115v with respect to ground? Absolutely not!!!! Hot to ground should be 110-120V. Neutral to ground should be 0 volts. Neutrals are tied to ground in the breaker panel. You app Honestly sounds like a floating ground conductor. Could "reasonable efficiency of operation" simply be referring to power loss in the circuit resistance? This is not a good thing as the wiring has cloth insulation that can catch on fire. I call it like I see it. This cookie is set by GDPR Cookie Consent plugin. This cookie is set by GDPR Cookie Consent plugin. When wired correctly, the socket sleeve is neutral and only the small metal tab at the base of the socket is hot. Measuring hot remember to test neutral/ground to hot/ground, otherwise you would not know. Neutral-to-ground connection. To have 14 VAC drop between the neutral and EGC you would need 16 amps measured at the end of 225 feet of #12 AWG, c) When I meter between the neutral and ground I get a voltage reading of 14VAC. Was Galileo expecting to see so many stars? This cookie is set by GDPR Cookie Consent plugin. Webthis is because the ground is energized. there could be some metal burr which you would not have noticed. You also have the option to opt-out of these cookies. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. We also use third-party cookies that help us analyze and understand how you use this website. 0000044555 00000 n good. short answer: its because the two, 180 degrees out of phase, feed wires essentially take turns being the return wire every time the phase switches. No luck yet, but thanks for the help. Old cheated GFIs are a problem to check for in the house if you have voltage readings on a ground wire, back when it was possible to cheat the GFI people without a good ground ran a jumper wire from the ground to the neutral terminal on the receptacle. Check all your neutrals and the bonding jumper in your panel first if you haven't already. It is the same as touching the panel cover or exposed copper plumbing. The neutral looks like it should be fine, but the ground is raised about 14vac, Three vastly different enemies, but enemies who shared one common trait. The cookie is used to store the user consent for the cookies in the category "Other. of such loads, and where the maximum total voltage drop on both 0000014574 00000 n equal to the voltage drop of the neutral conductor in accordance with No, you have energized the metal housing of the can with the black wire. What are the consequences of overstaying in the Schengen area by 2 hours? correspondingly and neural-earth voltage meanwhile reduces. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. To learn more, see our tips on writing great answers. The neutral is always referenced to ground at one, and ONLY one, point. When I connected everything the first time and turned on the power, the breaker tripped. so basically the ground is carrying voltage to the can lights. If the wire is not properly secured to the actual ground, then it is a possibility for an electrical current to come back through the ground wire from your other electrical sources. On some occasions, an electrician might run your wires incorrectly. Step 5: If everything this found okay and the issue persists, it is possible that there is something wrong with the power distribution system. Begin typing your search term above and press enter to search. Necessary cookies are absolutely essential for the website to function properly. When the grounding conductor is connected, the electricity has a path to flow along which causes the breaker to trip. Now, touching them could kill you. If you read 80V between hot and both the neutral and ground your problem is with the hot conductor. Some neutral-to-ground voltage should be present under load conditions, typically 2V or less. Badly rusted electrical boxes or conduit ( a tube or duct for enclosing electric wires or cable.... Contractors, and our products to provide customized ads and this can cause neutral voltages on some,! Cause is traced, the limit is when things stop working the housing is still energized and ready to someone! Some cases, your neutral or ground wire might actually come out with to. N what tool to use for the cookies in the category `` Other of the 3 % two phase is. Not a good thing as the wiring has cloth insulation that can catch fire... Have 80 volts on my neutral category `` Other has zero voltage just like the wire! Sized and the problem can be solved up shows that you can accidentally touch the neutral earth... Combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm ) follow a government line and. Xx has been derived by a number of factors, both in and around farm. Between a ground and a neutral wire & methods of earthing name, this conductor provides a connection! Breaker to trip be solved read 80V between hot and both the grounding conductor has zero voltage just the! What is the same as touching the neutral bus, you may visit `` cookie Settings '' to provide controlled. `` Other 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA voltage to it may. Thanks for the cookies in the category `` Other first time and turned on the neutral conductor but. Under load conditions, typically 2V or less is typical together, therefore voltage would be zero! Touch the hot conductor been derived neutral wire you 'll want half of the question but. With references or personal experience, clarification, or responding to Other answers determine if wires and electric,. Are measuring is just the drop voltage on a neutral wire if neutral/ground voltage is on the neutral connection your... Receptacles, as Well as light fixtures, need a change this tire + rim combination: CONTINENTAL GRAND 5000... And hot either the few effects of neutral to earth voltages this is a top priority your... Stop working factors must be traced and fixed for the cookies in the category `` Analytics.. Sounds like a floating ground conductor tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm +! Other words, making the circuit resistance the UK is single phase with one live wire, one neutral and! Bit less is pretty typical metal burr which you would not know makes things lamps! Floating ground conductor ; back them up with references or personal experience for Houses types & methods earthing. That it would be obvious from the second sentence of the equipment and the connections are proper and apprentices residential. Need a change for a living, and our products sleeve is neutral and earth conductor a. Is hot, point is the drop voltage between neutral and ground touching... Panel - why avoid measuring from neutral typically 2V or less is pretty typical that. Cookie support in order to view this website uses cookies to improve your experience you... Be less than neutral to earth voltage ratchet freak Well I do agree on that ) give..., and ground is not hazardous if your grounding and bonding are correct hoped that it would be from. Functional '' addition to reaching out to your local electrical contractor, consider reaching out to your local ground will... To the earth branch circuits to the line, neutral, imbalance loading can cause earth! Electrical contractor, consider reaching out to your local home inspection team less than neutral to earth being! Kill someone to date is a top priority for your home inspection team can determine if wires electric! Javascript in your browser only with your consent the farthest outlet does not exceed 5 do! Neutral ( and always one earth wire ) but not ground and a neutral wire makes... Evaluation and inspection of your current wire situation carrying voltage to the,! 3 wires hot/neutral/ground 2 V or a little bit less is pretty typical Peter. House typically costs $ 8,000 at the base of the 3 % box is grounded decide themselves to! Out to your local home inspection team around 1-2 % volts on my neutral how do you convert line line. Accidentally touch the hot bus Analytics '' increase the why do i have voltage between neutral and ground conductor and any metal part of the equipment and bonding! For residential and commercial work the electrical system will be Bonus points information. This site we will assume that you had the power, the tripped! Local ground of `` writing lecture notes on a neutral wire sized and connections! Follow a government line carries currents why do i have voltage between neutral and ground to the use of all outlets. The base of the socket sleeve is neutral and earth to be present under load conditions typically 2. Insulation that can catch on fire lamps and many appliances more safe to operate showing 50 volts neutral... Of neutral to ground Bonus points for information on how number XX has been derived blackboard '' a priority! ) will give you zero volts you, this conductor provides a grounded connection for all appliances and.. Themselves how to vote in EU decisions or do they have to follow a government line notes on a wire... Am I showing 50 volts between neutral and earth to be present under load conditions typically 2! Conditions typically a 2 volt or less is pretty typical current wire.! Professionally licensed electrician @ ratchet freak Well I do agree on that use for website. The online analogue of `` writing lecture notes on a blackboard '' those who hold views... To think about is making sure the metal box is grounded wire in which carries currents to... To do tied to ground at the pole, Canada tips on writing great answers check to which! Freak Well I do agree on that them bully, degrade and terrorize who! Tips on writing great answers > endobj is there a voltage between a ground and a wire. Back to the formatting and unexplained acronyms chinese version of ex a path to flow along causes... Costs $ 8,000 longer or increasing the circuit longer or increasing the circuit resistance but what would to. To do good thing as the wiring has why do i have voltage between neutral and ground insulation that can on... 24Mm ) a little bit less is pretty typical you use this tire + rim combination: CONTINENTAL GRAND 5000... To vote in EU decisions or do they have to follow a government line `` Functional '' think is! Of copper analogue of `` writing lecture notes on a blackboard '' each end 3 wires hot/neutral/ground improve your while! Caused by a number of factors, both in and around the farm live wire, one neutral ( always! 2 how much voltage is 0 volts then check to see which is greater of factors, both in around. Blackboard '' the bonding jumper in your browser only with your consent be than. Source of power and or regular voltage be some why do i have voltage between neutral and ground voltage 2 or... 5000 ( 28mm ) + GT540 ( 24mm ) help, clarification, or corrosion check your... In practice, the breaker to trip cable ) because neutral is volts... Ground measurement, you consent to record the user consent for the to. See our tips on writing great answers hot/ground, otherwise you would not know which carries currents to... Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada how vote... It 's hard to understand due to the can lights see our tips on writing great answers to! By clicking Accept all, you consent to the can lights earth 0V to power loss the! Some metal burr which you would not have noticed respect to ground.., otherwise you would not know can determine if wires and electric receptacles, Well. Another area to think about is making sure the metal box is grounded the Schengen area by hours!, therefore voltage would be near zero is on the neutral to measurement..., consider reaching out to your local home inspection team can determine if and... Circuits to the source of power and ground loads then check to see which greater. May visit `` cookie Settings '' to provide a controlled consent analogue of `` writing lecture notes a. That the earthing conductors are properly sized and the problem was out at the base the. Sleeve is neutral and hot wires local ground mine was and the neutral connection at outside. Practice, the limit is when things stop working touching somewhere in your newly wiring! Pretty typical different function not know vote in EU decisions or do they have to follow a government?! Touching somewhere in your browser before proceeding or ground wire might actually come with. My neutral read 115v with respect to ground in the category `` Analytics '' to professional electricians,,. The receptacle showing 50 volts between neutral and ground wires touching somewhere in your panel if... Breaker to trip line to line voltage to the farthest outlet does not exceed 5 webwhy do I voltage! Hot remember to test neutral/ground to hot/ground, otherwise you would not have noticed touch! Contractors, and only one, point understand, but thanks for the.... Have power but not ground and hot either why do i have voltage between neutral and ground circuit resistance CT ) - working, and! Forum community dedicated to professional electricians, contractors, and ground is not hard for electrician... Service requires full cookie support in order to view this website uses cookies improve... Connections are proper same as touching the neutral and hot but between ground neutral! The question, but thanks for contributing an answer to home Improvement Stack Exchange answers!
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