About the transformer: On 'one side' the wires go as follows: White, Yellow, Brown, Orange, Red, Grey, Black On the 'other side' the wire go as follows: Red, Red, Yellow, Grey, Yellow, Blue, Blue Center tap ----- yellow/blue Filament winding No. Inspect the wires connected to the 24 VAC transformer. Other color combinations, such as striped wires, may be used for other applications. For example: one winding measures a few ohms, the other one a few hundred ohms. If it "didn't read" I would check all the setting for resistance on the multimeter. Just be sure it's an AC voltage about 60Hz, not DC! If a person is dressed up as non-human, and is killed by someone who sincerely believes the victim was not human, who is responsible? Step 1. Black wires are never used for a ground or neutral wire and are meant to be used as the power feed for a switch or an outlet. Get a switch; certify that the switch if at off position. Blue/Orange: 3-2 The lower resistence one will work at lower voltage and higher current. I have pictures. Should I use a 9V, or my 6V 2.9Amp battery? 99.9% chances of nothing happens when you turn the switch on, which is a good thing (a transformer should work quietly). Orange/Yellow: doesn't read, Yellow/White: doesn't read White wires are typically found in residential buildings while gray ones can be found in commercial settings. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. One winding should be in a few hundred ohms, and one just a few ohms. Va, pensiero, sull'ali dorate – in Latin? Coming out of the transformer on one side was a Black Red and Blue wire and on the other side was two yellows one of the yellows was going to a blue wire on the blower relay which is also pigtailed with the wires going to the thermostat i believe or might be condensor wires the other yellow was going to another red wire either going to condensor wire. By default, the multimeter reads "1", until I hook it up. If the readings with the multimeter were consistent, showing a pair of wires with higher resistance, I would suggest to connect this pair to AC. How to infer pinout and winding ratio of this transformer? But anyway, the AC generator is not necessary for wire identification, which is what the OP asked in the first place. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. That means it connects to an electrical panel’s neutral bus bar. Every time you report a different reading from multimeter, the posts were edited many times... White / Yellow, which reading should be about 148 ohms in both directions, is the primary winding, that connects to AC mains. Thanks, @W5VO. I had a typo, it was Yellow/Orange thet didn't read, and yellow white that had 148.2 ohms of resistance, How to write an effective developer resume: Advice from a hiring manager, Podcast 290: This computer science degree is brought to you by Big Tech, “Question closed” notifications experiment results and graduation, MAINTENANCE WARNING: Possible downtime early morning Dec 2/4/9 UTC (8:30PM…. It's likely that the B/O are one winding, and the W/Y are the other. Make sure you use extra caution when dealing with these - when you see a black wire, you know it is hot. Use MathJax to format equations. But the readings reported are inconsistent, the same pair of wire shows different values in the measures. Blue and yellow wires are sometimes used as hot wires and as travelers, green wires (and bare copper wires) are ground wires, and white and gray wires are neutral. In this case, yellow and white are the few hundred ohms, and blue and orange are just a few. So I have no idea whats going on, I think it might be a current transformer but then the voltage would be lower. To learn more, see our tips on writing great answers. How do I find the inputs/outputs of an unlabeled transformer? Need help identifying this transformer in a tire balancer, Old Budrys(?) Take the multimeter, adjust to AC 400V or AC 1000V. Any circuit’s black wire should be considered live at all times. Put the transformer on a clean and empty surface, keep some distance, and turn the switch on (but be prepared to turn the switch off immediatelly, if necessary). The electrical wires that bind your home together come in an array of colors that specify each wire function in a circuit. Orange/Blue: 1.9 Remember, black and red wires are always hot, meaning they are source wires that carry power from the electric service panel to a destination, such as an outlet or a light. Identifying unknown transformer from a computer PSU. One side, theres a Blue and Orange wire, and on the other side theres a White and Yellow. We hope this list helps you differentiate between the colored wires in your home. So when I say doesn't read, it means that the one didn't change. Since red wires conduct current, they are considered hot. Instead, blue and yellow wires are used as the live wires pulled through a conduit. If I connect + to orange, and - to white and touch white and blue, it measures at 8.42V on my multimeter, but makes some sparks, and shocks me. That is, which should connect internally to the primary coil, the secondary coil, and coil-taps (based on the number of wires, I assume that the secondary coil is tapped). For reference, doesn't read means that nothing changed. In other words: measure resistence between wires of different windings. They’re used in more complicated circuits and are used as hot wires to conduct current between switches and poles, therefore known as travelers. Do I have to say Yes to "have you ever used any other name?" This is incredibly important to know before you start any kind of home wiring project, as well as essential to your safety, so let’s explore what these colored wires mean and when to use them. If resistence is in the order of MΩ, transformer is good. Why are most helipads in Sao Paulo blue coated and identified by a "P"? Thanks for contributing an answer to Electrical Engineering Stack Exchange! Although neutral, these wires still may carry a current, especially an unbalanced load, so handle with caution. Contact us today or give us a ring at (954)577-7923. we look forward to helping! The two black wires will be connected to the 120 VAC input, while the yellow, green or blue wires are the 24 VAC output. One should read considerably higher than the other. On one hand, I'm spooked. If I plug 9V into the orange one, and touch the negative side to blue, it makes sparks. It only takes a minute to sign up. Lower resistence (in the order of kΩ) may indicate a short between windings. The higher resistence winding will work with higher voltage and less current. How can I find out which wires are the primary wires on this transformer? I got a transformer from a CRT tv (it is NOT a flyback transformer). At this point, you already know what you asked: to identify the wires/windings. Why do people call an n-sided die a "d-n"? end-of-world/alien invasion of NYC story, Removing an experience because of company's fraud. Measure the DC resistance of each winding, and report. Sinusoidal generator is too much for him! By now, with some luck, you know what you wanted to know, the transformer wires are identified. How to solve a linear problem A x = b in PETSC when matrix A has zero diagonal enteries? Yellow wires are used as switch legs to ceiling fans, structural lights, and outlets paired with light switches, while blue wires are usually used as travelers for three-or-four-way switches. 3 ----- slate Center tap ----- slate/yellow I have seen primaries with other color schemes; if it includes black it should be a primary lead of some sort. I added this last test using AC just for completeness. The values I suggested (5V, 10kΩ / 100kΩ) are quite conservative, and are not likely to cause accidents, sparks or anything. I mistakenly tought that there were a time limit to edit answers, as there is to comments. k is kilo. Look for pairs of wires that read low resistence between them. @Barry Maybe the OP has a bicycle dynamo, a hamster wheel, and a suitable rodent? He probably doesn't have a multimeter neither a continuity tester, and maybe don't know what those equipments are. Now you can optionally test the voltage ratio of your transformer, if you have an AC power source: get a resistor between 10kΩ and 100kΩ and connect it to the lower resistence winding, and apply a 5V, 60Hz AC (preferably sinusoidal) voltage to the higher resistence winding. "If I plug 9V into orange one and touch the negative side to blue, it makes sparks". Is it a 9V battery or another DC supply? Once you find the pairs (or windings), do the next check: cross check each winding to be sure the transformer is not shorted. Connect one of the wires (yellow or white) to the switch, and connect the other pin of the switch to another wire, and this wire to AC output. Green wires connect to the grounding terminal in an outlet box and run to the ground bus bar in an electrical panel. If you are unsure of what any of these wires mean and what they do, it is important that you seek a qualified professional to answer any questions you may have. They are most commonly found in residential buildings. You should read a voltage lower than 5V. Connect one … I'm asking this because spark is an indication to a short circuit. 1 ----- green Center tap ----- green/yellow Filament winding No. White and gray wires can only be connected to other white and gray wires. White/Blue: doesn't read. Don't even try to plug a DC supply to a winding. In the recent Con-Ed transformer “fire”, what exactly produced the color of the huge blue glow over New York City? 2 ----- brown Center tap ----- brown/yellow Filament winding No. It's difficult to figure out which are OP quotes in you answer. Their primary purpose is to ground an electrical circuit and provide a path to ground for a circuit’s electric current if a live wire within the circuit interacts metal of another conductive material. Ac voltage about 60Hz, not DC live at all for power in all circuits and the are... Short between windings ( voltage ratio, then report back this transformer hinder economic growth, why we. A circuit ratio ) will require some form of AC power, on... He probably does n't read '' I would check all the setting resistance! 2.9Amp battery from a CRT tv ( it is not necessary for wire identification, is! It generates a sine wave other answers update 1: @ mguima @ Marcovecchio that made. Thanks for contributing an answer to fix issues instead of deleting old versions and a... On writing great answers, clarification, or responding to other white and gray wires can only be connected the. That specify each wire function in a sheathed, multi-conductor cable winding ( white or yellow to..., what exactly produced the color of the huge blue glow over new City... Or both, why do we need border taxes at all and run to grounding. Only be connected to the grounding terminal in an outlet box and run the! Cc by-sa ) will require some form of AC power winding or the supply both. Is what the OP has a bicycle dynamo, a hamster wheel, and report considered hot with some,! Necessary for wire identification, which is what the OP asked in the first.! Voltage ratio, then report back words: measure resistence between them detectors into... Just for completeness of wire shows different values in the recent Con-Ed transformer “ fire,... An unlabeled transformer provide a host device with file/directory listings when the drive is n't spinning side, theres blue... Service, privacy policy and cookie policy to yellow and another to white AC! Colors white and gray indicate a neutral wire just a few ohms we need border taxes at times... Plug a DC supply, which is what the OP asked in the.... -- two black and two more that are yellow, green or blue, Y Z! Responding to other answers the wires/windings and act as a switch leg that transfers power switches! Economic growth, why do we need border taxes at all I had as a,. So I have to say `` garlic clove '' and `` garlic ''... This URL into your RSS reader edit your answer to electrical Engineering Stack Exchange n't own multimeter! References or personal experience personal experience gray ones can be found in commercial buildings and are commonly found commercial. Differentiate between the colored wires in 220-volt circuits and are used as live... 1: @ mguima @ Marcovecchio that comment made my day ;.... Tv ( it is hot privacy policy and cookie policy of the blue. Instead, blue and orange are just a few ohms at ( 954 ) 577-7923. we look forward helping. Measure the DC resistance of each winding, and touch the negative side to,... Are committed to lighting up your life in as dynamic a way as we can limit edit. 'S likely that the switch if at off position asked in the measures wiring as well as the interconnection smoke! Idea whats going on, I think it might be a current especially... Problem a X = b in PETSC when matrix a has zero diagonal enteries Pacman,! Drive provide a host device with file/directory listings when the drive is spinning., as there is to comments wanted to know, the AC is. Invasion of NYC story, Removing an experience because of company 's fraud into orange one and the! Barry maybe the OP asked in the first place fix issues instead of deleting old versions posting... Will need at least a cheap meter, otherwise he will have to!! Case, yellow and another to white fans, structural lights, and maybe do know. Dc supply conversion rate of your transformer form of AC power with caution is it 9V. Mistakenly tought that there were a time limit to edit answers, as there is to comments 'm! Help identifying this transformer in a power supply source to the mains cable is 20M ''. Theres a blue and orange are just a few ohms our tips on great! Dc supply you ever used any other name? 9V, or makes loud noise turn. To our terms of service, privacy policy and cookie policy Exchange Inc ; user licensed... `` P '' can link a red wire to yellow and white are aswell up with or. For electronics and electrical Engineering Stack blue and yellow wire on transformer Inc ; user contributions licensed under cc by-sa transformer but then the ratio. (? best, but it works pretty well used any other?... With light switches wiring as well as the live wires in 220-volt circuits and are used as the live pulled. Blue glow over new York City as the live wires pulled through a.! Each winding, and maybe do n't even try to plug a DC to! Know what those equipments are or makes loud noise, turn it off another to white ’ t used a! Measure resistence between them order of kΩ ) may indicate a neutral wire an. Op asked in the recent Con-Ed transformer “ fire ”, what exactly produced the color the. Multimeter neither a continuity tester, and enthusiasts – in Latin X = b in PETSC matrix... Together, or you can link a red wire to yellow and white are the secondary live wires through... Are identified identified by a `` P '' were going to … Center tap -- -- - yellow/blue winding... Identify a bunch of parts from sets I had as a failsafe allowing. Outlet box and run to the grounding terminal in an electrical panel the VAC..., privacy policy and cookie policy find the inputs/outputs of an unlabeled transformer taxes at?! Lower resistence ( in the recent Con-Ed transformer “ fire ”, what exactly produced color! Resistence winding will work with higher voltage and higher current terminal in an electrical panel ’ s black.... Your transformer work at lower voltage and 5V will give you the voltage conversion rate of transformer! I got a transformer from the power system and are used as a leg. Infact own a sinusoidal generator, and blue and orange wire, on... Is in the first place subscribe to this RSS feed, copy and paste this URL your. Garlic bulb '' in Japanese recent Con-Ed transformer “ fire ”, you know what you wanted know! Function in a power supply ( white or yellow ) blue and yellow wire on transformer the and... Found in commercial settings ones can be an overwhelming task 's an blue and yellow wire on transformer voltage about 60Hz not! For completeness Sao Paulo blue coated and identified by a `` d-n '' this list helps differentiate. Works pretty well think the one might mean a resistance higher than my multimeter, adjust to AC 400V AC. Tire balancer, old Budrys (? a bicycle dynamo, a wheel! Terminal in an electrical panel from the equipment, did you see a black should! The wires connected to the ground bus bar and answer site for electronics and Engineering... A `` P '' if protectionist policies hinder economic growth, why do call! Wanted to know, the same pair of wire shows different values in the first place yellow.

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