There is no distinction on those IEC connectors for 120V vs. 208V/240V. This limits starting capability. 1 - 4 of 4 Posts. 220 is an archaic term left over from way back in the day. Nominal system voltages are 120, 208, & 240. Running a 208V motor on 230-244V … The machines I am worried about are my iron worker, my roller and my mill. 13 years ago. I will be moving my shop soon and the shop Im going to has three phase power and 208 single phase. I run into this way more than I'd care to. Reactions: Chipper5783. The frequency is the killer, not the voltage. As stated most panels are rated for 250V so 208 would be fine. I just googled and some parts of China have 220VAC @ 50hz. Because I have a triple phase UPS, I only have two types of output power - 120V or 208V. It can be tempting to use a 208V/240V-only power distribution unit. asked Jun 22 '12 at 14:22. Only the businesses use the third phase, and his panel is run by two of the legs. A quad tap ballast would be marked 120v, 208v, 240v, 277v and would have to be set up for the correct line voltage. Can he use a shared neutral setup? Radar. Like; Save; bus_driver. 124k 67 67 gold badges 288 288 silver badges 561 561 bronze badges. Save Share. Second, stepping 208V up to 240V is not tidy. To wire it just use 2 hots instead of 3 and connect the neutral. 2. So, what does the rating plate on it say? What would happen is probably nothing but it would not be compliant. There's maybe a 50/50 chance that you can feed the kiln with single phase 208V and it'll still run properly. If you can specify how many BTU/Hr. share | improve this question | follow | edited Jun 5 '14 at 10:08. Hi Kammy, First, let's get a minor detail clarified. You seem to have your voltages all confused. About the Driver Shown in the Photo Above 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. Those who know binary, and those who don't. If the device’s nameplate states that it can run at 208v (in addition to say 220v or 240v), you are fine. If they are dual rated it shouldn't matter on the supply voltage. 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? or sign up with email About this Discussion. 12,412 Posts #8 • Dec 15, 2014. power said: I have ran into the same issue with one of our welders. I'm not 100 percent familiar with the concept of 3 phase systems. 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. Yes you can, good idea to give the bearings a shot of oil, so that the rotor does spin when it is powered. 460 volt motors are designed to run … 03-16-2009, 09:59 PM. Most newer motors will run 208-240 just fine. 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. Thanks for any ideas. Even if it's not, any 240V-rated heater can be run on 208 at reduced power. 208V 3ph machine on 240V 3ph? As you mentioned there are no cheap controllers for 240V. 208V equipment 240V power help! This doesn't mean the voltage at the receptacle is 250V though. Re: 3 Phase Motor Voltages: 208 vs. 240 … Does it say 208-240V or just 208V? The solution is to strictly follow the design guide. Sometimes the nameplate will state 208-240v as acceptable voltage ranges. But you can get 120V, phase to neutral. 213 1 1 gold badge 3 3 silver badges 6 6 bronze badges. 2)There is no such thing as 3Ø 110/208 3) There is no 220 in the US. Can you use a 208V 3ph rated commercial dryer on a 240v 3ph line? running 1 208v or 240v circuit to your rack gives you 2 120v circuits. Benzo Benzo. 208v is found in industrial settings as well as 277v and 480 volt taps. You'll probably just need to buy a 240V heating element for the oven of the same wattage as the old 208V element. You can generally apply +- 10% of this value to the equipment and still achieve normal operation. 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. 1) There is no such thing as 220/240. Many manufacturers sell both options. Most modern devices can support this, but you must check the nameplate of each device to be powered. Would a shared neutral cause problems (ie, addition of outgoing current) in the neutral wire? See thread248-278883: Question on transformer requirement for HVAC Controls Card. In a house, you have two 120V supply lines of the same 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. Helping a buddy try to avoid a $1000 mistake. 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? 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. It introduces a high-impedance into the circuit for starting a small motor. If a panel is rated 208V-- which would be unusual then you cannot serve it with a 240V line. 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). Give the motor a full 240V before it starts. For example, 120v-277v will operate on any voltage between 120v and 240v. 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. Canada/USA run at 60hz frequency.. it's incompatible. As stated earlier, the power that goes in must match that power that comes out without creating anything new. Here is where I get confused. These will normally have IEC connectors for the input and output instead of the US 5-15R straight blade receptacles. You may have some grounding issues. Most of the time you see 208 volts on 3 phase and 230-240 on single phase. This means that during the high inrush current of the motor, a high line impedance drops the voltage. A 240 volt resistance heater supplied by 208 volts will have a heat output of 75% of the 240 volt rating. 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. In this case the motor is overvoltaged by ~ +4% and that's fine. Do not plug it into a standard 120V house circuit. Except for the reduced output, the 208 volt supply should not cause any of the other problems mentioned. I actually have Can the motor be re-wired to opperate from 240V 3ph; 11-24-2007, 12:55 AM #2. mxtras. I am not clear on what you are asking. Are the 2 hot wires still out 180 degrees, or is it 120? Join the discussion. Which country are you in? Dual rated (208/240v) systems have lower current ratings at higher voltages. electrical appliances 240v. 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. Therefore, the 208V elements will likely fail on 240V and that failure may be spectacular (very dangerous). If it says 208-240V you could have it wired to the service panel if the panel rating is big enough to handle it. 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. The 240 did not fry your motor, something else is wrong / broken. If you run a 10HP, 230V motor up in the Service Factor range (at or above 10HP), it will overheat from the excess current. What's this about a transformer? If heaters (Warren) are rated for 208V, why would a 240V system not work? The problem with using the 208V oven on a 240V circuit is that the heating element can draw too much current and overheat. Most of my machines are single phase machines. Reply. It may be for just that voltage. Running machines on 208v? 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. 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. Devices can run on a wide range of voltages, and often the higher voltage is better.. as it lowers the ampacity. Many manufacturers sell both options. (208V). An electrician can advise you on this . 120/208 or 120/240. But devices will fry if you run them at the wrong frequency. LED drivers and fluorescent ballasts marked with a dash between the voltage will function in that range. If you look on the receptacle and cord/plug you'll see that it says 250V instead of 240 or 230 or 220. 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. Continue with Google. Residential power in the US will be 220-240 between the phase legs in your panel. Warren is proud of their duct heaters. Since most Motorola equipment requires 120V, we need to split the 208V back into two 120V conductors – but it can’t be done. If so I would assume it is wrong and should be corrected. The IEC receptacles will usually be IEC C13, which is also what is used on most servers (in the matching C14 plug). There are 10 types of people. or total watts the element needs to be, I may be able to recommend a cheap big box home center solution. Now if you are talking about a motor control panel then we have a different issue. Discuss please. Many (probably most) heating appliances are rated for both 208 and 240V operation. However, a 208V-only heater on 240V will run at 33% higher power and this could cause overheating. I like the bicycle analogy. No, you cannot get 240V when the transformer nameplate says 208V. I plan to eventually run a second 240 volt outlet when I have the time and consider this a temporary solution. The motor insulation is good for at least 600V, probably more. As others have said, check the nameplate or call the manufacturer. Can you run a 240V clothes dryer on a 208V 3-phase connection? 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. Rob . What are you asking. 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.,. Can you use 240v on 208v motor? 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. 230 volt motors are designed to run on 240. I HIGHLY doubt you should have a 208v service to a residence. The two output legs are 180 degrees out of phase and from hot to hot they will measure 208v or 240v. The variation of +10% -6% permitted on the actual voltage received at a property covers this variation anyway. Tester101. 208V Single Phase and 208V 3 Phase power are easy to use, but hard to understand. 208V is part (two hot wires) of a three phase grounded wye system. A tandem bicycle has two people providing power with four legs (pedals). Bicycle Analogy . It sticks around because it rolls off the tongue so well. 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. 3 Replies 4 Participants Last post: micromind Sep 15, 2009. Continue with Facebook. 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 230 volt motor running on 208 volts will run a slightly higher amp draw. If you want a simple understanding but aren’t electrically minded, start with a simple analogy you can build on. I would wire it up and put an amp probe on it, if the current draw is within reason, you should be fine. 208V, why would a 240V line 220VAC @ 50hz not plug it into standard. Need to buy a 240V heating element can draw too much current overheat. 240V heating element can draw too much current and overheat fry your motor, something else is wrong broken... 240V clothes dryer on a 240V line 's fine a temporary solution this a solution. 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