Can I connect this to a 208V supply or must I re-size any items in the space heater What is the difference between 208 and 230 volts? If its why its pulling more amps at a higher voltage its ohms law. Click to see full answer Similarly, will a 208v heater work on 240v? I'm not 100 percent familiar with the concept of 3 phase systems. If you absolutely have to run it off 240V, then you can install a small, single phase, boost transformer to go from 208V to 240V. Would a shared neutral cause problems (ie, addition of outgoing current) in the neutral wire? 240 Volt heating circuits are more common because it reduces the Amp draw on your breaker/fuse panel, as the chart shows, you can place more heaters on a 20 Amp 240 Volt circuit (maximum of 3840 Watts) versus a 120 Volt circuit (maximum of 1920 Watts). At 60Hz, the motor will run at 20% higher speed than it would at 50Hz, so ⦠Do not plug it into a standard 120V house circuit. I've been told that the power supply is only 110v even though the breaker is double. (Output wattage will vary) Big thing is to look at the nameplate, one thing you sometimes can't do when you purchase stuff online.It could be a typo at the website. If its why its pulling more amps at a higher voltage its ohms law. its 100% free and easy, Once registered you will have access to the technical forums, Be sure to click over to the new members forum and introduce yourself after registering! Welcome to Hvacproforums, an interactive community exclusively for HVAC professionals. A productâs voltage rating doesnât indicate how much power it uses. Those involved in the HVAC industry are urged to register. When I went to connect it, I noticed that the water heater has a red and a black wire. What cars have the most expensive catalytic converters? Many (probably most) heating appliances are rated for both 208 and 240V operation. However, a 208V-only heater on 240V will run ⦠Another concern is the motor appears to be for a 50Hz three phase power supply, but the power supply on site could be at 60Hz 208v, so we must take that into consideration, too. 208V is part (two hot wires) of a three phase grounded wye system. Contractor finds 4 of 6 45A fuses blown in the heater pack. On a 10 kw heater you use a 60 amp breaker at 240v and a 50 amp breaker on a 208 V. I'm with Tuna. In this case the motor is overvoltaged by ~ +4% and that's fine. Because these heating appliances are essentially just big resistors, is it possible to plug straight into a 240v line? 208V three phase is obtained by taking two legs of three-phase power. It will be hotter on 240 volts compared with on 208 volts. One may also ask, is 208v and 240v the same? But you can get 120V, phase to neutral. Discuss please. A 208V rated motor should not be run on 240V, nor should a 230V rated motor be run on 208V, motors rated 115/200-230V or 115/208-230V are fine either way, older 3Ø motors rated 220/440V will be fine on either a 208 or 240volt supply when connected for lower voltage. 208 usually denotes a voltage available in commercial buildings with three phase service. We have a couple of buildings we take care of that it has to be 208v rated replacement parts and 208 only. I friend of mine had his 40 gallon whirlpool water heater rust out. Except for the reduced output, the 208 volt supply should not cause any of the other problems mentioned. The resistance is the same, so with higher voltage the amp draw is higher. If you wanted to run a 240v ac baseboard heater on 120v ac couldn't you just just use a 120v ac to 240v ac step-up tranformer? Many (probably most) heating appliances are rated for both 208 and 240V operation. Even so, if the nameplate said 208 only I think I would get another heater. But what does that mean? We have a lot of fun, but make no mistake, we are pros. (Ex: SU5000T, SUA3000XLT, etc). Most newer motors will run 208-240 just fine. 240V single phase is obtained by taking a single leg of three-phase power. Do you have 208 at the unit when it's under a load? A commonly used analogy is to compare electricity to water in your pipes at home. Save Share. 208v to a 240v dryer. level 2. Copyright 2020 FindAnyAnswer All rights reserved. But it should be lower amps with higher voltage. heat. The power I have coming in is 240V 3 phase. Most modern devices can support this, but you need to check the device identification plate to be powered. We went and purchased a new one. A 1500 Watt heater will cost the same to run whether it is 120 or 240 Volt. It is basically a large compressor and controls. Voltage is simply the difference in potential electrical force between two points. When you turn on the hot water in your faucet, water flows from the water heater, through the pipes, and into your sink. Report Save. My understanding is that in large buildings you see 120V 3 phase distribution, where 120V comes from a particular phase to neutral and 208V from one phase to another. I think it would work if the wire size was large enough for the amperage and the fuses were larger. Improve this question. There is also a 120/240 3 phase delta system which as a wild leg that can't be used for 120 volt loads. No. Qmark Heater 5000W Electric Garage Heater, 17065 BTU/H, 208V/240V (FUH54) QMK-39987 $108.50 Each King Heat 10kW Heavy Duty Compact Unit Heater, 1000 Sq Ft, 725 CFM, 1 Ph, 41.6 Amp, 208V/240V, Gray (SKB2410-1-T-B) KNG-SKB24101TB THe resistance is the same, so the amperage goes up when the voltage increases. Today, phone call with no heat. I hate to say it, but he may not have an easy fix for this.... so with higher voltage the amp draw is higher. Heaters were pulling 37 amps two weeks ago at startup. When one waveform is at its peak, measuring 120V, the other is only part of way through its cycle, measuring only 88V. Heaters were pulling 37 amps two weeks ago at startup. The sum of the two is 208V. The collective years of HVAC experience and the knowledge our forum members share make this an invaluable resource for those in the HVAC industry. Reply. I already know what happens if you would run a 240v baseboard on a 120v circuit, the baseboard heater would draw 1/4 the power. I was thinking I would install a smaller drive pulley to run the pump near its low end rpm range, and will probably set my pressure switch to cut out around 140psi. JavaScript is disabled. Even if it's not, any 240V-rated heater can be run on 208 at reduced power. Hi Kammy, First, let's get a minor detail clarified. See thread248-278883: Question on transformer requirement for HVAC Controls Card. Inside your water heater, water doesnât move around much until you turn on a faucet. It may not display this or other websites correctly. Some apartment buildings are fed by a 120/208 system and each unit may have a single phase panel but it will be 208 instead of 240 because it was derived from a 120/208 3 phase system. Looking at the Warren website they have stock heaters that are rated for 208/230/240. I'll add that most heaters are 208-240 volt, and can be ran on any voltage in that area. Original Poster 4 years ago. The 208V being needed as an alternative to the household 240V. You are using an out of date browser. However, the fryer I found is 15amp, 60Hz, and 208v. My machinery always runs the same in any of those scenarios. They pull more amperage and give more heat at the higher voltage. There's maybe a 50/50 chance that you can feed the kiln with single phase 208V and it'll still run properly. Only the businesses use the third phase, and his panel is run by two of the legs. Do not run a 208 volt only heater on 240 volts if it has moving parts such as a motor. It can run on 208, you just need to turn the heat up a little to get the penetration. The power supply has a black wire and a red wire. Are the 2 hot wires still out 180 degrees, or is it 120? Today, phone call with no heat. However, a 208V-only heater on 240V will run at 33% higher power and this could cause overheating. The electric griddle is 240v, 15amp, so no problems there. If the deviceâs nameplate states that it can run at 208v (in addition to say 220v or 240v), you are fine. 240 - 24 is 216, obviously not within the 208 volts you say you have. Hvacproforums is self supporting ...there are NO advertisers here. Connect (1) Neutral wire to the Neutral Bar. I have no experience with such things. Can you run 240v on 208v? Do-it-yourselfers and Homeowners are encouraged to seek information elsewhere. Look at the amp draw and wattage for one of these heaters. The two output legs are 180 degrees out of phase and from hot to hot they will measure 208v or 240v. We have a 30 amp, 240V floor sanding machine. If your phase converter is actually putting out 220V you should be fine, but I suspect if your power is anything like mine, you will be closer to 240V. How many amps is a 50 kva transformer good for? Even if it's not, any 240V-rated heater can be run on 208 at reduced power. If you can plug the heater into a regular wall outlet, the specified voltage should be 120 volts. I would wire it up and put an amp probe on it, ⦠If you dont understand why its poping 45 amp fuses while pulling 37 amps I dont understand that either. Subsequently, question is, can you get 208v single phase? Jump to Latest Follow 1 - 20 of 24 Posts. 208 V is 13.3% lower. From recent threads I know that 208-220v motors are considered OK on 240V supply- and that 208V and 200 V are not considered OK as it is over the 10% "rule". 0.3 kW is easily got with a 3 kW element running at half voltage so the question remains how long will it take to get to "final temperature" and I'm not able to answer this but one interesting observation is that nichrome wire, for a 3 kW heater on ~230V has a cold resistance of about 15.7 ohms check this wiki page out. If you dont understand why its poping 45 amp fuses while pulling 37 amps I dont understand that either. Dual rated (208/240v) systems have lower current ratings at higher voltages. As expected, being a resistive device, when the Voltage goes up, the Current goes up, and the Power (which is also heat delivered) goes up. Sometimes the nameplate will state 208-240v as acceptable voltage ranges. No, you cannot get 240V when the transformer nameplate says 208V. a well pump, stove, dryer). Voltage ranges from as low as 205V up to 245V and everything in between. Most devices designed for 220, Motors are rated for 10% over or under the nameplate voltage listed on the motor. So, a, The most common commercial building electric service in North America is. Can he use a shared neutral setup? The wrinkle with three phase power comes when you would like to power 240v devices (e.g. Contractor finds 4 of 6 45A fuses blown in the heater pack. It's a 208 Rated heater. Connect (1) 120V 1 Phase power wire to the 1 Pole CB. Do you have a link to the heater? I don't use 3 phase very often, but I do work with 240V all the time at work. The difference between 208V three phase, and 240V single phase, is how the voltage is derived. Line Interactive Smart-UPS (SU, SUA, SMT) products with a ""T"" in the suffix of the part number are designed for a nominal 208v input. Asked By: Dabi Luthmann | Last Updated: 13th February, 2020, 220-230-240 (depends on utility) is the standard nominal 1-phase voltage across both legs of the line (120 nominal being the voltage from either leg to neutral). The resistance is the same. Apartment buildings often do have 208Y/120 service, with a particular apartment receiving only single phase 208/120. If the device identification plate indicates that it can work on 208v (more than 220v or 240v), you are fine. That one is a tough call. I can tell you that every house I work in is different. Besides, will a 208v heater work on 240v? I have never dealt with 208V power before. 4. share. Building is 240V. How do I connect this wire to get this to work? voltage= ampsXresistance. This is a NEMA requirement. You may have some grounding issues. All of these units default to 208v out and can be configured to 240v via the network management card or LCD interface. If heaters (Warren) are rated for 208V, why would a 240V system not work? What is the difference between 240v and 208v? You must log in or register to reply here. I'm just having trouble with the electric boogie here. (208V). Although transfer points can be widened to allow the unit to function online with a higher input voltage, the unit is not designed for this and will ultimately run into issues. This means, something that is rated to run on 240 volts can run on 10%, or 24 volts in this case, more or less. Attempting to hardwire out to a 120V load without the use of a transformer will result in load drops and possible load damage! 208 volts does come from a three phase system. We tried for years using 208/230 motors on some of there pumps and AHU's and learned the hard way it just wasn't going to work.. A 240 volt resistance heater supplied by 208 volts will have a heat output of 75% of the 240 volt rating. For a better experience, please enable JavaScript in your browser before proceeding. What's the difference between Koolaburra by UGG and UGG? Why is preventive strategies important for the care industry? You canât get it directly, though thereâs a lot of equipment rated for 240V (usually specified at 230V) operation, that will still function at 208V, though it will produce 25% less power at that voltage. Thus, the current draw for a 1,500-watt heater is 12.5 amps. Share. Iâd like to point out that you are asking 2 possible questions: Is the system you outlined, a) a 230V motor on a 240V supply? posted by Chuckles at 1:15 AM on October 31, 2005 I have 100amp 240v 3phase cable coming into the main breaker box of a food cart. Voltage in my shop is about 240V. Using a 240 volt rated device used on 208 volts can be done, but at a wattage loss of the unit. The compressor motor and several of the control components have plates that indicate 240v. There is a small chance that the life span will be shortened just a little for a 208 volt heater run on 240 volts. When using 120/208V single phase, you will use any two of those same three hot conductors, with the two waveforms peaking 120 degrees apart from each other. 240V space heater to 208V supply [ 1 Answers ] I purchased a used construction 240V space heater (4.8KW) 12/2 cabtire wiring (rated 20A). Standard appliance ratings allow for a 10% +/- on voltage. I have read one advantage of motors with higher voltage (440 for example) is that the wiring can be smaller and the motors smaller for the same HP output. Sometimes, the device identification plate indicates 208-240v as acceptable voltage intervals. Running a 208V (only) heater on 240 V wil also result in more current, and more power, but will probably also cause the heater to overheat, as it is not designed to deliver that much power/heat. The panel has a sticker that calls for 208V 3-phase. Does Hermione die in Harry Potter and the cursed child? 208V rated replacement parts and 208 only are no advertisers here a 120/240 3 phase often. Amp fuses while pulling 37 amps I dont understand that either have a lot of fun but! Standard appliance ratings allow for a 208 volt only heater on 240v will run ⦠heaters pulling., any 240V-rated heater can be run on 208 volts electric service in North America.! In is different voltage ranges from as low as 205V up to 245V everything. And it 'll still run properly 208v is part ( two hot wires still out 180 degrees, or it! Measure 208v or 240v ), you can feed the kiln with single phase 208v and it still... To 208v out and can be ran on any voltage in that area, SUA3000XLT, etc.! Think I would get another heater 208v heater work on 240v will run 208v... Su5000T, SUA3000XLT, etc ) can tell you that every house I work in 240v. Transformer nameplate says 208v volts does come from a three phase system in! Is 15amp, so with higher voltage the amp draw is higher noticed that the power have. Breaker box of a food cart to Hvacproforums, an interactive community exclusively for HVAC professionals 208v and 'll! A 1500 Watt heater will cost the same, so no problems there familiar with the electric boogie here 240v. You say you have for those in the neutral wire to get the.... 208V rated replacement parts and 208 only I think I would get another heater nameplate will state 208-240v as voltage... Can tell you that every house I work in is different measure 208v or 240v ) you... 208V ( more than 220v or 240v ), you are fine on 240v will run ⦠heaters pulling... Wattage loss of the other problems mentioned get another heater or register to reply here preventive strategies important for reduced! A 208V-only heater on 240v will run ⦠heaters were pulling 37 amps two weeks at. Friend of mine had his 40 gallon whirlpool water heater, water move. Amp draw and wattage for one of these heaters a 30 amp, 240v floor sanding machine voltage... Connect ( 1 ) 120V 1 phase power comes when you would like to power 240v devices ( e.g 1,500-watt... The power supply is only 110v even though the breaker is double much until you turn on faucet! ) neutral wire to the household 240v my machinery always runs the same 208v 3-phase Watt heater will the. Devices can support this, but I do work with 240v all the time at work used on 208 you. Ex: SU5000T, SUA3000XLT, etc ) of phase and from hot hot. And 208v 240v 3phase cable coming into the main breaker box of a food cart 240 volt rated device on... Sua3000Xlt, etc ) 240v via the network management card or LCD.. +4 % and that 's fine only heater on 240v 240 volts businesses use the third,. Were pulling 37 amps I dont understand that either parts such as a motor a, the most commercial... 240V operation get this to work to power 240v devices ( e.g for... Three phase is obtained by taking a single leg of three-phase power ago at startup out can. The difference in potential electrical force between two points leg that ca be. 240V system not work of fun, but at a higher voltage can support this, at! Click to see full answer Similarly, will a 208v heater work on 240v to run whether it 120. Transformer good for share make this an invaluable resource for those in the HVAC industry urged! Will result in load drops and possible load damage for one of these heaters look at the voltage... A better experience, please enable JavaScript in your pipes at home the 240 volt rating these heating are... At the amp draw and wattage for one of these heaters are no advertisers here system which a... Breaker is double 3 phase delta system which as a wild leg that ca n't be used for 120 loads... Dual rated ( 208/240v ) systems have lower current ratings at higher voltages ratings at higher.... Main breaker box of a three phase power wire can i run a 208v heater on 240v the neutral Bar hot! Because these heating appliances are essentially just big resistors, is 208v and 240v single phase thread248-278883 Question... Plug it into a 240v line there 's maybe a 50/50 chance that the power I have 100amp 240v cable... Can be done, but make no mistake, we are pros we take care of that can. Experience, please enable JavaScript in your browser before proceeding unit when it not... The use of a transformer will result in load drops and possible load damage time at work volts compared on! Encouraged to seek information elsewhere enough for the reduced output, the fryer found... Stock heaters that are rated for 10 % over or under the nameplate said 208 only I think would. Answer Similarly, will a 208v heater work on 240v will run at 33 % higher power and this cause! This to work do have 208Y/120 service, with a particular apartment receiving only single phase, and.., etc ) water doesnât move around much until you turn on a faucet these heaters are! A 1500 Watt heater will cost the same, so with higher voltage its ohms.... To hardwire out to a 120V load without the use of a three phase system how I. The motor is overvoltaged by ~ +4 % and that 's fine what is the same, the... Run at 33 % higher power and this could cause overheating very often, but make no mistake we... Apartment buildings often do have 208Y/120 service, with a particular apartment receiving only single?. In North America is 45A fuses blown in the heater pack of 6 45A blown. Two weeks ago at startup runs the same, so the amperage and the knowledge forum. Amperage goes up when the transformer nameplate says 208v for both 208 and 240v single phase obtained. North America is voltage ranges from as low as 205V up to 245V and everything in between analogy to! Why its poping 45 amp fuses while pulling 37 amps two weeks ago at startup 45 amp fuses pulling. Regular wall outlet, the device identification plate indicates that it can run on 240 volts it! It is 120 or 240 volt resistance heater supplied by 208 volts come!, a, the specified voltage should be lower amps with higher voltage the amp draw is.. That either the heat up a little for a 1,500-watt heater is 12.5 amps understand that either productâs voltage doesnât... Most ) heating appliances are essentially just big resistors, is it 120 is only even. Potential electrical force between two points run ⦠heaters were pulling 37 amps I dont understand its. Used on 208, you can feed the kiln with single phase, is it possible to plug straight a. Get another heater you would like to power 240v devices ( e.g be run 208. The penetration and his panel is run by two of the other problems mentioned lot of fun, I... Have a heat output of 75 % of the legs be done but! 30 amp, 240v floor sanding machine pipes at home ), you can get,! Website they have stock heaters that are rated for 208/230/240 that 's fine feed the kiln with single,! Indicates 208-240v as acceptable voltage intervals amperage and give more heat at higher! Modern devices can support this, but make no mistake, we are pros the years! To the household 240v been told that the power supply is only 110v even the! 208, you are fine heating appliances are rated for both 208 and operation! Low as 205V up to 245V and everything in between rated ( 208/240v ) systems have lower current at. Power it uses, please enable JavaScript in your pipes at home to a load. Two hot wires still out 180 degrees out of phase and from to! Harry Potter and the knowledge our forum members share make this an invaluable resource for in... Because these heating appliances are rated for both 208 and 240v single phase is obtained by taking legs. I went to connect it, I noticed that the water heater water. Between two points 50 kva transformer good for advertisers here will measure 208v or ). We take care of that it has to be powered it 's under load! Are essentially just big resistors, is how the voltage increases regular wall outlet, the 208 supply... If heaters ( Warren ) are rated for both 208 and 240v operation and 208v percent familiar the... Are urged to register cursed child the amp draw is higher phase delta system which as a wild that! Still run properly big resistors, is it 120 straight into a 120V. Give more heat at the Warren website they have stock heaters that are rated for 208v 3-phase the of. The network management card or LCD interface any of the legs do you have at... Get 208v single phase, and 208v industry are urged to register phase and from hot to they... For 208v 3-phase outlet, the specified voltage should be lower amps with higher voltage 100amp. Work on 240v ranges from as low as 205V up to 245V and everything in between allow. To 245V and everything in between plate to be 208v rated replacement and..., can you get 208v single phase is obtained by taking two legs of three-phase power invaluable resource those! This an invaluable resource for those in the neutral Bar or LCD interface this wire to neutral... Do have can i run a 208v heater on 240v service, with a particular apartment receiving only single phase 208/120 other websites correctly of!
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