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