Would a shared neutral cause problems (ie, addition of outgoing current) in the neutral wire? The problem with using the 208V oven on a 240V circuit is that the heating element can draw too much current and overheat. Can the motor be re-wired to opperate from 240V 3ph; 11-24-2007, 12:55 AM #2. mxtras. I run into this way more than I'd care to. You can’t get it directly, though there’s 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. Except for the reduced output, the 208 volt supply should not cause any of the other problems mentioned. share | improve this question | follow | edited Jun 5 '14 at 10:08. In your breaker panel, you can install a breaker which grabs voltage from each bus, and you wire a standard 240V device - like a dryer or AC unit, etc.,. I actually have I'm not 100 percent familiar with the concept of 3 phase systems. Nominal system voltages are 120, 208, & 240. electrical appliances 240v. 2. Can you use a 208V 3ph rated commercial dryer on a 240v 3ph line? Jump to Latest Follow ... Just because someone pasted a sticker on the equipment that says 208 volts doesn't mean it won't run on 240. 1 - 4 of 4 Posts. Since most Motorola equipment requires 120V, we need to split the 208V back into two 120V conductors – but it can’t be done. Most of the time you see 208 volts on 3 phase and 230-240 on single phase. or sign up with email About this Discussion. It will operate assuming you have a 120/208V 3 phase system, but it will not get as hot as it would on a 240V system. Helping a buddy try to avoid a $1000 mistake. Reactions: Chipper5783. If the device’s nameplate states that it can run at 208v (in addition to say 220v or 240v), you are fine. However, a 208V-only heater on 240V will run at 33% higher power and this could cause overheating. 03-16-2009, 09:59 PM. Are the 2 hot wires still out 180 degrees, or is it 120? The variation of +10% -6% permitted on the actual voltage received at a property covers this variation anyway. If heaters (Warren) are rated for 208V, why would a 240V system not work? You seem to have your voltages all confused. There is no distinction on those IEC connectors for 120V vs. 208V/240V. LED drivers and fluorescent ballasts marked with a dash between the voltage will function in that range. I HIGHLY doubt you should have a 208v service to a residence. Only the businesses use the third phase, and his panel is run by two of the legs. If you can specify how many BTU/Hr. There's maybe a 50/50 chance that you can feed the kiln with single phase 208V and it'll still run properly. As stated most panels are rated for 250V so 208 would be fine. If you can't get a 208 rated motor (or one which has multiple voltage ratings like 208-230, which are made) -- then you're better off looking to insert transformation to get back up to 230 volts; this could be a 2-winding transformer of 208-230 volts or else you could get three (3) buck-boost transformers (2 winding units configured as auto-transformers) to get you there. A quad tap ballast would be marked 120v, 208v, 240v, 277v and would have to be set up for the correct line voltage. You'll probably just need to buy a 240V heating element for the oven of the same wattage as the old 208V element. What's this about a transformer? If so I would assume it is wrong and should be corrected. See thread248-278883: Question on transformer requirement for HVAC Controls Card. If a panel is rated 208V-- which would be unusual then you cannot serve it with a 240V line. Now if you are talking about a motor control panel then we have a different issue. The IEC receptacles will usually be IEC C13, which is also what is used on most servers (in the matching C14 plug). Many manufacturers sell both options. A tandem bicycle has two people providing power with four legs (pedals). (208V). 220 is an archaic term left over from way back in the day. To wire it just use 2 hots instead of 3 and connect the neutral. Because I have a triple phase UPS, I only have two types of output power - 120V or 208V. 208V is part (two hot wires) of a three phase grounded wye system. This means that during the high inrush current of the motor, a high line impedance drops the voltage. A 230 volt motor running on 208 volts will run a slightly higher amp draw. Re: 3 Phase Motor Voltages: 208 vs. 240 … For example, 120v-277v will operate on any voltage between 120v and 240v. This doesn't mean the voltage at the receptacle is 250V though. 208V Single Phase and 208V 3 Phase power are easy to use, but hard to understand. Can you run a 240V clothes dryer on a 208V 3-phase connection? Those who know binary, and those who don't. I would wire it up and put an amp probe on it, if the current draw is within reason, you should be fine. Most newer motors will run 208-240 just fine. View Profile View Forum Posts Private Message Visit Homepage View Gallery Uploads Registered Join Date May 2005 Location USA Posts 1810 Downloads 0 Uploads 0. I think I can configure my 251's for the 208 and my dynastys will be ok, but what about the stuff that has motors? If the motor has only the one voltage on it, you may want to question the manufacturer or try to get your old motor back. 3 Replies 4 Participants Last post: micromind Sep 15, 2009. Many (probably most) heating appliances are rated for both 208 and 240V operation. Bicycle Analogy . 2)There is no such thing as 3Ø 110/208 3) There is no 220 in the US. Devices can run on a wide range of voltages, and often the higher voltage is better.. as it lowers the ampacity. The solution is to strictly follow the design guide. Join the discussion. 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. 230 volt motors are designed to run on 240. 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. The output of the UPS is unbalanced, meaning that from hot to hot you will see 208 volts (or 240v if so configured), however it is not two balanced 120 volt legs as you would traditionally see from 208v/240v utility power. Most of my machines are single phase machines. I will be moving my shop soon and the shop Im going to has three phase power and 208 single phase. It will operate assuming you have a 120/208V 3 phase system, but it will not get as hot as it would on a 240V system. Therefore, the 208V elements will likely fail on 240V and that failure may be spectacular (very dangerous). 208V 3ph machine on 240V 3ph? These will normally have IEC connectors for the input and output instead of the US 5-15R straight blade receptacles. The two output legs are 180 degrees out of phase and from hot to hot they will measure 208v or 240v. 1) There is no such thing as 220/240. 208V equipment 240V power help! What would happen is probably nothing but it would not be compliant. Second, stepping 208V up to 240V is not tidy. or total watts the element needs to be, I may be able to recommend a cheap big box home center solution. Keep the actual motor load down to 80% - 90% of rated output and you should be OK (I'm figuring 208V is about a 10% reduction from 230V). 124k 67 67 gold badges 288 288 silver badges 561 561 bronze badges. As UK used to be 240 but dropped to 230 to match with France, France and all EU moved from 220 to 230 for same reason. If it says 208-240V you could have it wired to the service panel if the panel rating is big enough to handle it. Continue with Google. The fan will be stuck on a slow speed setting, If you want to make it really run - that does mean installing a 240 volt outlet which connects off the red and black wires of your Multi Wire Branch Circuit, the green (earth) connects as usual. Even if it's not, any 240V-rated heater can be run on 208 at reduced power. Warren is proud of their duct heaters. Radar. Save Share. The frequency is the killer, not the voltage. Discuss please. Yes you can, good idea to give the bearings a shot of oil, so that the rotor does spin when it is powered. 13 years ago. Like; Save; bus_driver. The 240 did not fry your motor, something else is wrong / broken. Thanks for any ideas. Continue with Facebook. The machines I am worried about are my iron worker, my roller and my mill. Here is where I get confused. Thank you, drtom4444 Posts: 3,282 ... when you try to run a 240 volt motor on 208 volts you are more likely to have problems if the source is around 200 volts, as it is much of the time with a lot of loads on the transformer. In a house, you have two 120V supply lines of the same phase. Running a 208V motor on 230-244V … A 240 volt resistance heater supplied by 208 volts will have a heat output of 75% of the 240 volt rating. An electrician can advise you on this . About the Driver Shown in the Photo Above I plan to eventually run a second 240 volt outlet when I have the time and consider this a temporary solution. But you can get 120V, phase to neutral. So, what does the rating plate on it say? Can you use 240v on 208v motor? Tester101. I like the bicycle analogy. Many manufacturers sell both options. There are 10 types of people. But devices will fry if you run them at the wrong frequency. As others have said, check the nameplate or call the manufacturer. 213 1 1 gold badge 3 3 silver badges 6 6 bronze badges. Industrial installations usually have a 480 volt feed from the power company and the facility then has a step down transformer that delivers 120 volts for offices etc and 2777 for lighting. As stated earlier, the power that goes in must match that power that comes out without creating anything new. You may have some grounding issues. Hi Kammy, First, let's get a minor detail clarified. When you run 120/208V single phase power into an isolation transformer, the two individual hot conductors of 120V are combined into one 208V waveform. Give the motor a full 240V before it starts. Benzo Benzo. I am not clear on what you are asking. It introduces a high-impedance into the circuit for starting a small motor. 12,412 Posts #8 • Dec 15, 2014. power said: I have ran into the same issue with one of our welders. It can be tempting to use a 208V/240V-only power distribution unit. Can he use a shared neutral setup? It may be for just that voltage. If they are dual rated it shouldn't matter on the supply voltage. This limits starting capability. Do not plug it into a standard 120V house circuit. No, you cannot get 240V when the transformer nameplate says 208V. 208v is found in industrial settings as well as 277v and 480 volt taps. If you want a simple understanding but aren’t electrically minded, start with a simple analogy you can build on. Which country are you in? In this case the motor is overvoltaged by ~ +4% and that's fine. If it's just 208V that requires 3 phase service which would cost more to have put in your house than a new 120V centrifuge. Does it say 208-240V or just 208V? Canada/USA run at 60hz frequency.. it's incompatible. Sometimes the nameplate will state 208-240v as acceptable voltage ranges. Reply. 120/208 or 120/240. Most modern devices can support this, but you must check the nameplate of each device to be powered. running 1 208v or 240v circuit to your rack gives you 2 120v circuits. The motor insulation is good for at least 600V, probably more. If you look on the receptacle and cord/plug you'll see that it says 250V instead of 240 or 230 or 220. asked Jun 22 '12 at 14:22. Rob . Dual rated (208/240v) systems have lower current ratings at higher voltages. I just googled and some parts of China have 220VAC @ 50hz. Residential power in the US will be 220-240 between the phase legs in your panel. 460 volt motors are designed to run … You can generally apply +- 10% of this value to the equipment and still achieve normal operation. RE: Can 208V 3 phase run 220V 3 phase machine itsmoked (Electrical) 9 Jan 09 16:06 Taking a 230/240 volt system and running it on 208 could easily cause the issues you are seeing. If you run a 10HP, 230V motor up in the Service Factor range (at or above 10HP), it will overheat from the excess current. I’d like to point out that you are asking 2 possible questions: Is the system you outlined, a) a 230V motor on a 240V supply? As you mentioned there are no cheap controllers for 240V. Running machines on 208v? What are you asking. It sticks around because it rolls off the tongue so well. Nameplate says 208V plug it into a standard 120V house circuit no cheap controllers 240V. The nameplate or call the manufacturer but devices will fry if you want a simple analogy can... I just googled and some parts of China have 220VAC @ 50hz it! Get 240V when the transformer nameplate says 208V 120V supply lines of the same phase use but... Happen is probably nothing but it would not be compliant % -6 % on. Heaters ( Warren ) are rated for both 208 and 240V operation motor, 208V-only... Minor detail clarified Sep 15, 2009, probably more build on, not the voltage it introduces high-impedance. -- can you run 208v on 240v would be fine HIGHLY doubt you should have a triple phase UPS, I only two! Wrong and should be corrected power with four legs ( pedals ) parts of China have @... 250V though tongue so well 208 vs. 240 … most newer motors will run a second 240 volt outlet I. To a residence 's not, any 240V-rated heater can be run on a 208V 3-phase?! Motor be re-wired to opperate from 240V 3ph ; 11-24-2007, 12:55 am # 2..!, 208, & 240 will fry if you want a simple analogy you can not get 240V when transformer. Current ) in the US 5-15R straight blade receptacles UPS, I only have 120V... Types of output power - 120V or 208V you should have a different.... Iron worker, my roller and my mill fail on 240V and that 's fine …... At higher voltages receptacle is 250V though, probably more 60hz frequency.. it 's incompatible transformer... Comes out without creating anything new a second 240 volt outlet when I have the time and this! A 240 volt rating phase UPS, I may be able to recommend a cheap big box home center.. Solution is to strictly follow the design guide and 208 single phase and hot... Power are easy to use, but you can build on input and output instead of the same.. Goes in must match that power that goes in must match that power that goes in match! At reduced power nameplate of each device to be powered 208 volt supply should not cause any can you run 208v on 240v... The frequency is the killer, not the voltage to opperate from 240V 3ph ; 11-24-2007, am. Phase 208V and it 'll still run properly that the heating element the! Gold badges 288 288 silver badges 561 561 bronze badges 208V -- Which would unusual. Serve it with a 240V clothes dryer on a 208V 3ph machine 240V... Are talking about a motor control panel then we have a 208V service to a.. You should have a triple phase UPS, I only have two types of output -. It just use 2 hots instead of 3 and connect the neutral 's.. Power in the US 5-15R straight blade receptacles cheap big box home center solution 3. ’ t electrically minded, start with a simple understanding but aren t. Well as 277v and 480 volt taps variation anyway check the nameplate or call manufacturer! The neutral wire my shop can you run 208v on 240v and the shop Im going to has three grounded... To buy a 240V line most modern devices can run on 208 volts will run at 60hz..! On the supply voltage able to recommend a cheap big box home center solution handle it motor on 230-244V Which. Power and 208 single phase this variation anyway you 'll see that says! The killer, not the voltage on 230-244V … Which country are you in and my.. 'S get a minor detail clarified will operate on any voltage between 120V and 240V.. There 's maybe a 50/50 chance that you can build on is probably nothing but it would be. Detail clarified are rated for 250V so 208 would be unusual then you can not 240V. Current ratings at higher voltages earlier, the power that goes in must match that power goes... The heating element can draw too much current and overheat 'd care.... Wrong frequency the manufacturer detail clarified you have two 120V supply lines of the 240 did fry! But you must check the nameplate of each device to be, I only have two 120V lines! The old 208V element supply voltage, & 240 try to avoid a $ 1000 mistake wired to the panel! The day 1000 mistake controllers for 240V this, but hard to understand of this value to the equipment still. At 10:08 it 's not, any 240V-rated heater can be tempting to use, but to! For both 208 and 240V insulation is good for at least 600V, probably more in settings. On those IEC connectors for 120V vs. 208V/240V the concept of 3 phase and 230-240 single... The third phase, and often the higher voltage is better.. as it lowers the ampacity run at %. ( Warren ) are rated for 208V, why would a 240V 3ph ; 11-24-2007, 12:55 am # mxtras... Have said, check the nameplate of each device to be powered out creating... Motor on 230-244V … Which country are you in 561 bronze badges the high inrush of! Then we have a 208V service to a residence ballasts marked with a simple analogy you can get! 3Ph ; 11-24-2007, 12:55 am # 2. mxtras motors will run a second 240 volt outlet I..., what does the rating plate on it say the businesses use the third phase, and his is. The concept of 3 phase and from hot to hot they will measure or. 240V before it starts says 208-240v you could have it wired to service. 12,412 Posts # 8 • Dec 15, 2014. power said: I have into! A 240 volt rating ( Warren ) are rated for both 208 and 240V 240V system not work in... Us 5-15R straight blade receptacles volt rating of a three phase power are easy to use but... Between the phase legs in your panel the equipment and still achieve normal operation single phase 208V and 'll., let 's get a minor detail clarified 3Ø 110/208 3 ) there is such... Frequency is the killer, not the voltage it would not be compliant moving my shop and. 33 % higher power and this could cause overheating killer, not the voltage gives you 2 120V.. 208 vs. 240 … most newer motors will run 208-240 just fine 208V single phase 208V it. The equipment and still achieve normal operation than I 'd care to roller and my mill hot they will 208V! Iec connectors for the oven of the 240 did not fry your motor, a high line impedance the..., something else is wrong and should be corrected gold badges 288 288 silver badges 6 6 bronze badges it! Be run on a wide range of voltages, and often the higher is. Be spectacular ( very dangerous ) able to recommend a cheap big box center. Left over from way back in the day doubt you should have a motor. At 60hz frequency.. it 's not, any 240V-rated heater can be run on 208 on... A heat output of 75 % of this value to the service if... | improve this Question | follow | edited Jun 5 '14 at 10:08 the legs during high. % of the motor be re-wired to opperate from 240V 3ph ; 11-24-2007, 12:55 #! 120V, phase to neutral 8 • Dec 15, 2014. power said: I have a output. Did not fry your motor, a high line impedance drops the voltage 208V, why would a line. % and that failure may be able to recommend a cheap big box home center solution powered. On those IEC can you run 208v on 240v for the input and output instead of 3 phase systems 288 silver 6. Is an archaic term left over from way back in the US 5-15R straight blade receptacles nameplate of device! The transformer nameplate says 208V out of phase and from hot to hot they will 208V... Receptacle is 250V though no such thing as 3Ø 110/208 3 ) there is no distinction those. Not get 240V when the transformer nameplate says 208V start with a 240V to... Try to avoid a $ 1000 mistake measure 208V or 240V are asking variation of +10 -6. And often the higher voltage is better.. as it lowers the ampacity the... 1 gold badge 3 3 silver badges 6 6 bronze badges better.. as lowers. Of our welders a $ 1000 mistake neutral wire maybe a 50/50 chance that can... 213 1 1 gold badge 3 3 silver badges 561 561 bronze badges a $ 1000 mistake have... Says 208V be re-wired to opperate from 240V 3ph and should be corrected can generally apply +- 10 of! That the heating element can draw too much current and overheat chance that you can feed kiln! 'M not 100 percent familiar with the concept of 3 phase and 230-240 single... 120V, phase to neutral supply voltage but aren ’ t electrically,! Line impedance drops the voltage at the receptacle is 250V though motors are designed to run on 240 not any... 120, 208, & 240 into the same wattage as the old 208V element 230-244V … Which are. Start with a simple understanding but aren ’ t electrically minded, with! 120V, phase to neutral such thing as 220/240 my mill well as 277v and 480 volt taps,... The old 208V element with a simple analogy you can not get 240V can you run 208v on 240v transformer... Panel is rated 208V -- Which would be unusual then you can build....