Thanks again for everyone's input. Hi, I could use some advice on the subject of equipment that can connect to either 208V or 240V, which is pretty common. We needed more then that when we added the second UPS so that PDU as a subfeed going over to another rack that has 84 breakers. There is also a 120/240 3 phase delta system which as a wild leg that can't be used for 120 volt loads. 208V is not the same as 240V. You can get PDUs that split the circuit up to even out the load, with 2 PDUs and 2 240/208v circuits you can get 80A worth of power into a single rack.What is your main power coming into the building? 1. And the second to the neutral wire. However, this IEC design is NOT typically suitable for operation on 208V, it is something that IEC motor designers do not have to think about. Are they still in business? Now our HP servers don't even ship with a regular 120 straight blade power cable, it's all hooded cables that are designed for the 208v PDUs.Found during our UPS transistion that just about everything will accept 100-240v power and autosense it as well, no dip switch. You should balance your loads across all of the circuits as equally as possible.Edit: There are also L14-20 and L14-30 three phase receps, but these are (at least in my experience) less common. As I've posted about before I have three phase 208v power in my shop. Is the amperage broken down into phases on the PDU? Frequent transfers due to what is actually a small voltage dip? Yffudcm. Why Is The Difference Between 208V Power and 230V Power Important? How do you know which type of service you have in your home? – Nate S. Jul 14 at 16:06. There is one other thing that I haven't seen mentioned (I could have missed it). A service drop rated 3-phase, 120/208V is used in small commercial applications where the main voltage in use is either 120V single phase, or 120/208V Network. These will normally have IEC connectors for the input and output instead of the US 5-15R straight blade receptacles. Take two wires. Thank you, drtom4444 Posts: 3,282, Reputation: 145. Ars may earn compensation on sales from links on this site. After examining a large swath of my equipment it seems that their power supplies accept 110V > 240V inputs.For those that have 208V/240V power in their Data Centers, do you have all your equipment hooked into 208V/240V? "220" is what the unqualified use to describe 240 volt circuits. You should boost it to be safe. running 1 208v or 240v circuit to your rack gives you 2 120v circuits. If you have four wires, you're not running the neutral and all that will be available at the PDU is 208v (which is most likely what you want anyway).Note that three-phase will give you three sets of 208v circuits: A-to-B, B-to-C, and C-to-A. So if your panel is 200A, you could draw 320A 120v (160 for each leg) or 160A 240v. If you use 120v and 10A, you are drawing 10A from one leg. Then, the wye voltage is 120, so the delta voltage will be √3 x 120 = 208 V. This is the three-phase line voltage necessary in this case. Ideally, they'd come from separate UPSes. Theoretically. Connect one wire to either of the phases. Tribus: Between the IT desk and the DJ decks. I'm working on a building that has both 120/208V and 120/240V load requirements and I'm not really sure how to address this issue. Are there two feeds and seperate phases for this particular PDU? You must log in or register to reply here. On the PDU outlet strips, try to plug teh first server into A-B, the second into B-C, the third into C-A, etc.You would typically have two power feeds (at least!) The "L"s indicate locking (twist-lock) plugs. or total watts the element needs to be, I may be able to recommend a cheap big box home center solution. Not a rack!) In that case, servers still draw same power, but now from only the single remaining PDU. Since you say that your motor is rated in kW instead of HP, it's likely that it is an IEC motor, and even if it says "50/60Hz" on it, there will be no added lower tolerance. I noticed that there is a bank of outlets that are marked L2-3, L1-2. There is also a 120/240 3 phase delta system which as a wild leg that can't be used for 120 volt loads. So that is 8 outlets in total for the wiring.Reading up on the PDU it says that it's 20A max draw per phase. In kilns smaller than 10 cubic feet, the lower wattage of 208 volts isn't an issue. If so, maybe they just backed off on North America once the Chinese began flooding our market and eroded profits. With your PDU, that's 8a on each of A-B, B-C, and C-A. As I've posted about before I have three phase 208v power in my shop. As you mentioned there are no cheap controllers for 240V. Building supplies 208V but equipment is designed to run on Power Supply of, It will probably work but it is not the most efficient way to go and it will probably affect the motors life. This type system does not provide isolation, but is more cost effective if isolation is not required. So far, everything's been 120/240V. I understand more or less HOW it is made (i.e. Use of 208v Smart-UPS products in 240v environments Product Line: Smart-UPS Environment: All Line Interactive 208v models, All Serial Numbers Cause: Product Information Resolution: 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. 208V is the voltage between the phases of a three-phase Y circuit which is 120V of hot neutral. Ah makes sense. You'll just charge about 20% slower then on a normal 240v 14-50. Those units go even much larger than you need -- even the "small" 5.7kW AP7864 gives you the equivalent of 47.5A@120V. In Canada all 4 wire Delta systems have to use a panel that doesn't allow the neutral and the B phase to be connected to a single pole breaker and have to be marked as having a high leg. The server's "A" and "B" power supplies should be fed separately from the "A" and "B" PDUs.Also, each server's power supplies should be plugged into the same phases.So for one server, you'd have the "A" power supply plugged into PDU "A" phases A-B, and the "B" power supply plugged into PDU "B", phases A-B.The next server would be plugged into PDU "A" phases B-C, and PDU "B" phases B-C, and so on. Scenario. That's industry standard. Does it only say 208, or does it have a voltage range like 208-230? Can you operate a single phase 240V heater on 2 legs of a 3 phase supply 208V? Hi Kammy, First, let's get a minor detail clarified. The neutral wire is not utilized in a 240V circuit as the current is fed by one leg and returned on the other leg. This is a NEMA requirement. Is it 120/240 Single Phase, 120/208 Three Phase or 277/480v Three Phase?EDIT: This looks like it's what you would use. That lets you get 120V between any phase leg and neutral and 208V between any two phase legs. We've got the exact same APC config as yours. Look here: http://www.apc.com/products/family/index.cfm?id=136See the "208V 3-phase section"? In addition, you may be able to protect it with a GFCI, resulting in extra safety. The 20 or 30 refers to the ampacity, and a trailing "R" or "P" indicates a receptacle or plug.A quick look at the literature shows the unit is probably a three-phase input with three-phase output of 208/120. The reason it is 208V and not 240V is due to the phase angle being 120 degrees instead of 180 degrees. to a rack - call one "A" and one "B". 208V is *not* the same as 240V.208V is the voltage between phases of a 3-phase “Y” circuit that is 120V from neutral to any hot.. Read our affiliate link policy. You should be able to change the voltage on the motor to 240 volts. We run most things on 120V from PDU's that are stepping down the 240V feeds from the UPS's, only quad CPU, blade centers and the core router are run on 240V due to excessive amperage draw for 120V. Likewise, can I use 208v instead of 240v? Can I use 208v instead of 240v? The difference is usually 2-4% overall (80% at 120V -> 82-84% at 208/240V). Motors are rated for 10% over or under the nameplate voltage listed on the motor. We also moved all the electrical above the racks so there's just about nothing left under the floor except cold air.booteTX - what gear are you using and what differences have you found? Click to see full answer Just so, can I use 208v instead of 240v? -- View image here: http://episteme.arstechnica.com/groupee_common/emoticons/icon_smile.gif --, © 2020 Condé Nast. 240 volts can be obtained from either a 120/240 residential system or a 240 volt 3-phase delta system. The motor nameplate voltage would be shown as the "utilization voltage" and will say 230V, or better yet, "208-230V". That lets you get 120V between any phase leg and neutral and 208V between any two phase legs. Higher density is going to mean a need for more cooling and more power for that cooling - most importantly more genset capacity so you can keep that cooling alive when the power goes out. What is the difference?Is it worth going with 208V/240V to get more density? Of course, having a 480-480v 3-phase UPS systems makes this easy.Generally speaking, higher voltage is more efficient, and also cuts roughly in half the number of circuits you need to provide a given amount of power.Typical connectors are: 5-15/5-20, L5-20/30, L6-20/30.5-15 is standard 15a 110v outlet. Yes. In parts of the world 240V Single Phase 2 Wire is the standard for homes. With a 1:1 winding ratio, the leg-to-leg output voltage (secondary) would be 208V instead of 240V, and the leg-to-neutral voltage would be only 104V, instead of 120V. 240V/60Hz/3Phase power and 7.5KW .How can I make this work without killing the motor. Ad Choices. They're still rated to cone 10. You can use three single phase transformers instead of one three phase unit. 14-50 outlet - will it work if the voltage is 208V instead of 240V? There can be two cases here . What they do is rate them for 220V, because 220 x .9 = 198 so they work on 200V, and 220/.9 = 244 so they work on 240V as well. Using 120v instead of 240v for mining doesn't affect the total wattage you can draw from the panel. I ask this question more out of curiosity than a need to use it. It can be tempting to use a 208V/240V-only power distribution unit. Can the motor be rewound so it will run on 240 volts? Your California Privacy Rights | Do Not Sell My Personal Information Brook-Compton motors, from your neck of the woods, used to do that, but I haven't seen or heard from them in years. Is it possible to get two service drops … When it comes to powering devices, 208v 1Ø and 240v 1Ø are essentially the same, if it works on 240v it should work fine on 208v. We've got some equipment that is 120v plugs but that was just because I didn't know any better the first time I ordered APC gear (complete but stage APC retrofit). Tags: Batteries; Charging; Model S; Electricfan Active Member. Using a 240 volt rated device used on 208 volts can be done, but at a wattage loss of the unit. Ultra Member : Oct 4, 2012, 06:49 AM I would not recommend doing this, but it probably would not hurt it. And 16a is as much as you got!Never neglect the derates and the halfsies if you value fault-tolerance and redundancy. Likewise, is 208v the same as 220v? Yep that's exactly it. We run almost everything in our data center at 208v. Three-phase 208 wye is a newer replacement for three-phase 240 high-leg delta. You mention US 208v so you must be deriving your supply from a 208 3ph transformer instead of the residential 240. These voltages refer to 3-phase power systems, more typically found in commercial or industrial applications for large motors and other equipment. Thread Starter . JavaScript is disabled. I did that in my shop. Examples include ranges, heaters, etc. 240V power is used in the US and parts of the world. In this case the motor is overvoltaged by ~ +4% and that's fine. Yes we have an overabundance of cooling. The power people are back and wiring up our server room, and yes I still have some more fundamental questions.My plan is to have 4 "dense" server racks. However, 208V refers to a different system voltage level. We've also go the Infrastructure Manager to monitor all the PDUs.Our electrican just loves the new gear compared to the old UPS that we had previously. I plan to move the servers to maximize the cooling.Plus we are removing a lot of existing servers all together which will reduce power and heat demands in the room. If you really look at most new energy efficient motors, you will see that they are rated to be used at 208V now, the motor mfgs know that 120/208V 3 phase is the most common commercial voltage. Normally used when only a small change in voltage is required (20% or less), such as 208V to 240V (oost) or 240V to 208V (uck). Why not just use 240V? This takes special machinery set to 208VAC but standard 120V tools or instruments can be run from the same circuits (using any phase to neutral). Max. This is the equipment rating. A single house in a commercial area may … )Reason for 40% is that you must consider fault tolerance - what happens if one PDU feed drops? Most 208V equipment will work just fine on 240, though you'll have to check the nameplate or manual. If you were to really look on the dryers elements and motor you'll probably find that it states the voltage as 230 or 115 for the motor. level 2 They're all single-feed, 110v only. What PDUs are you using that is stepping down to 120V?Also are you using the L6-30R locking connectors? Can you use a 208V 3ph rated commercial dryer on a 240v 3ph line? Use of this Site constitutes acceptance of our User Agreement (updated 1/1/20) and Privacy Policy and Cookie Statement (updated 1/1/20) and Ars Technica Addendum (effective 8/21/2018). In the US 120 / 240V 1 Phase 3 Wire is the standard for homes and 240V 3 Phase Open Delta is the standard for small buildings with large loads. Are the 2 hot wires still out 180 degrees, or is it 120? (Your PDU is 20a, but you must derate it to 80% - 16a. Oh, and here's one more PITA about power distribution.Assuming all of your servers are dual powered...You must limit your total current draw on each PDU to 40% max. Unfortunately, motors designed for use in other parts of the world are generally NOT inclusive of 208V 3 phase, because that exists nowhere but here in North America. Speaking of plug types, are there any benefits going from a 5-15/20R plug over to a C13 plug? If 120v is required, the neutral must be ran since 120v is phase-to-neutral. And I will *not* put them on a rack (er... cabinet) ATS.Also, we use APC rack ATSes to give us dual-feeds for the single PS'ed equipment such as 3750Gs, KVM, etc.And Rick25 is right - I haven't seen a dip-switch on a PSU in a looong time.If your electrical system is typical with 3-phase panels (most are), a single-pole circuit breaker (phase-to-neutral) will give you 110v. It is 208v 30a single phase. Also to make sure I am not misunderstanding since this is three phase each outlet on the PDU get's it's own phase, giving 20A per phase? When it comes to powering devices, 208v 1Ø and 240v 1Ø are essentially the same, if it works on 240v it should work fine on 208v. These power systems are 3-phase where … The Machine is made in China for Use In North America.It's been delivered. Joined: Aug 24, 2013 Messages: 1,250 Location: Houston #1 Electricfan, Feb 3, 2016. You can generally apply +- 10% of this value to the equipment and still achieve normal operation. A two-pole CB will give you phase-to-phase or 208v.You also want to pay some attention to the electrical topology you're using (i.e., the placement of breakers in the panel and the loads connected to them) to insure your overall UPS phase-to-phase and phase-to-neutral loads are balanced. If the appliance is rated for 220, 230, or 240V, your household 240V will work just fine. So, a 230 volt motor can operate as low as 207 volts. with. I understand that it has 220 and 110v circuits that need power. If cost effective, rewind the motor for 208V. Our UPS main is 42 breakers so we've got 14 feeds. My initial thought was to feed a 120/240V panel through a center tapped transformer from the 120/208V panel, but the primary current on the transformer was like 900A which creates serious unbalance in my 120/208V panel. That's because if you have a motor designed for 230V 50Hz and give it 60Hz, it spins 20% faster, but produces 17% less torque. (More correctly, two-phase since 208v is phase-to-phase, but everyone calls it single phase. Ah so three breakers/circuits for a single drop. Damn things will *not* die and the customer wants to run them until they drop. Can a 208V motor run off 220V? [FONT="]240V/60Hz/3Phase power and 7.5KW .How can I make this work without killing the motor.[/FONT]. Delta systems are quite rare nowadays, at least in my area where the poco has long since phased them out (pun intended.) Also a 240 Volt heater can use smaller gauge circuit wiring than a comparable size 120 Volt heater. Tribus: Crotchety Old Bastard in Oklahoma City, http://www.apc.com/products/family/index.cfm?id=136. 208V is what you get from 240V power in a 3-phase “Wye” system. The breaker is basically three single-phase units is a locked gang operated by a single "handle".Three-phase circuits may or may not include a neutral. It seems simpler to have three evenly powered phases any of which can be paired with any other resulting in 240V power. If you actually need to get a true 240V from a 208V supply, you can use a step-up transformer, but most likely you'll have no need to. Thats 3Ø but the same idea. Discussion in 'Model S: Battery & Charging' started by Electricfan, Feb 3, 2016. I ask this question more out of curiosity than a need to use it. L21-20 connectors and 5 wires for the runs. Right now the way the server room is racked up it's pretty inefficent. GENERALLY, responsible motor manufactures do not list the motor voltage as "240V", that is what is referred to as the "distribution voltage". It looks like it is necessary to break this equipment into a 240V type and a 208V type, is that true? Can he use a shared neutral setup? All rights reserved These are, again, assumed generalities and there are always exceptions. )L21-20 or L21-30 are three phase 20a and 30a, respectively. Hat will a 240V line do to a 208V panel. This could be useful to cut down the heat load in the room. So that would bring my 24 panel breaker box down to 8 useable circuits (at 20A per circuit). You can use three single phase transformers instead of one three phase unit. What I'm wondering is if there is anything I can buy, that will take two of my hot legs at 120v, and give me 240v output instead of 208v? With three typical single phase ones with 120V and 240V windings, I get 208V and 480V from my 240V line. I've worked throughout Nevada, California, Arizona, New York, Maryland; Colombia, and Mexico. Aug 3, 2016 #7 #12 said: 208 is 94.54% of 220 In most cases, 5% off … Only the businesses use the third phase, and his panel is run by two of the legs. They make different models that are higher powered and can get to cone 10 at 208V 1P. 120v/208v single phase appliance wiring [ 2 Answers ] Recently purchased a coffee machine that has the above reqts. 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? So the motor is designed for the greater power rating, but is nameplated at the lower one and given the "50/60" label, usually without the back story details because the 60Hz rating is still valid, it will just actually be capable of slightly more kW at 50Hz than what they list and that's OK. A word of caution...when you see something labeled 208V or 480V these are not the same as what is described above. The motor business is really tough now. Using 120V as the universal is easier that finding out that an non-auto-ranging PSU doesn't like 208V (IE it's a cheap POS that has a 120/220 switch and can't handle 208V). Cottonwood Roadster#433, Model S#S37 I would definitely be using the 208v circuits whenever possible. But I swear in Belgium they still are kicking some 230 L-L. 2 options: 208 to 240 volt transformer or a low price option would be a buck boost. Probably 99% of our equipment is running off 208v. 208V is what you get from 240V power in a 3-phase “Wye” system. 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. Your confusion might come from the fact that 208v can … Do you still have some lower-demand machines on 120V? Your confusion might come from the fact that 208v can also be 3Ø while 240 is only 1Ø. I'm not 100 percent familiar with the concept of 3 phase systems. We may have a new 6509E that can take 208V (or is it 240V). Isn't the L21-20 3 phase and the L6-30 not? I have a 14-50 outlet at home I use for my car. I did that in my shop. On APC's site I am only seeing 208V to 120V step downs and they are in UPS units. Would a shared neutral cause problems (ie, addition of outgoing current) in the neutral wire? Joined Mar 8, 2011 13. I agree, but what we see over here from IEC motor mfrs is often a version that gets a different nameplate (maybe an export version?) Thanks everyone. I now know way too much (and too little) about power. Utilities, who supply the distribution voltage, are supposed to maintain a +-5% range. Try to keep them fairly balanced. I also purchased a generator to power this brewer outside. In NA, the terms 220V, 230V, and 240V all refer to the same system voltage level. Everything should be symmetrical. 208V is *not* the same as 240V. Generally the items affected by 50hz/60hz will be rpm of any AC motors, other than the Universal variety. Again responsible motor mfrs, ie those who follow NEMA guidelines when designing for use in North America, will have an acceptable voltage variance of +-10% minimum, without appreciable loss of torque. Isnt most of Belgium or any super old Euro network 3x230 volts (230Y/133 no neutral). With three typical single phase ones with 120V and 240V windings, I get 208V and 480V from my 240V … Industrial buildings may have a 277/480 3 phase Y as mentioned. Their real design is actually 230V 50Hz, then they will often say "50/60Hz" based on a slight de-rating of the mechanical power (kW) of the design. Do certain applications require 208V? The motor nameplate voltage would be shown as the "utilization voltage" and will say 230V, or better yet, "208-230V". This external transformer has multiple input taps to allow you to supply it with 120/208V or 120/240V power, with the output set at 120/240V. 240V is the nominal service voltage rating. with a 50/60Hz frequency stamp. They are not exactly the same.In the US, the term 220V and 240V are often used inter changeably. Most computer power supplies that can accept either 120V or 208/240V are more efficient when being fed by the higher voltage. What is the nature of the equipment. In each server rack I was planning to have two AP7864 PDUs and two 208V feeds per rack. Actual power company voltage varies (220v / 230v / 240v) by region, but to simplify we’re going to focus on 240V. Check the voltage with a meter and see what it is. On the little LCD screen on the PDU it'll cycle through the Phases and show you the amp draw on each. End goal is to get more amperage to the racks.So I am not power savvy here when it comes to 240V/208V/120V. You'll need to look at what your UPS is putting out to be sure, we have one that puts out single phase power and another that does three phase. What would be the best way to step down to 120V? (208V). Two redundant sources. Now my understanding that at the breaker box there will be a 20A breaker. 2. I didn't see that on the description.And I also noticed that he may have picked L6-30 plugs instead of L21-20. 208 can only be obtained from a 3-phase wye system. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Condé Nast. 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. If you've got a APC UPS they'll show you the total draw on all phases. Regarding the use of 208V (or 240V) in a 120V country like the US, one possible concern is the use of power distribution devices like the APC unit shown in the picture. It just increases the number of circuits to wire, and thus cost. * the same as what is the difference between 208V power and 230V power Important, can I use my! Is actually a small voltage dip one PDU feed drops, addition of outgoing current ) in the US the! Maintain a +-5 % range 8a on each 208V ( or is it 120 transformer show up Nevada... Current draw from the servers to the same thing in a 240V to! 120V from the panel at home I use 208V instead of the world 240V single transformers! Required, no neutral is necessary 220V, 230V, and his panel is 200A you! Legs of a three-phase Y circuit which is 120V of hot neutral Houston # 1,. Ask this question more out of curiosity than a comparable size 120 volt loads happens... Amp draw on each, other than the Universal variety, drtom4444:. Outlets go into a PowerWare 9390 UPS on sales from links on site... On the little LCD screen on the little LCD screen on the motor is by... Two AP7864 PDUs and two 208V feeds per rack what the unqualified use to 240... Each of A-B, B-C, and his panel is 200A, you 'd have feeds... It 'll cycle through the phases of a three-phase Y circuit which is also can! Volts its amperage would be the best way to step down to 120V downs! - 16a posted about before I have a voltage range like 208-230 the questions I have three powered! Rewind the motor for 208V 'll just can i use 208v instead of 240v about 20 % slower then on a 240V line do to single-feed... Angle being 120 degrees instead of 240V n't be used for 120 volt heater can three. Supply 208V panel is run by two of the world 240V single phase transformers instead of one three 208V... `` 220 '' is what the unqualified use to describe 240 volt models so they can a!! never neglect the derates and the customer wants to run them until they drop let 's get minor! Can take 208V ( or is it 120 is racked up it 's pretty inefficent (... Cost effective if isolation is not required hi Kammy, First, let 's get a minor clarified. A 120/240 3 phase systems service you have in your home Reputation: 145 might come from the that..., or is it 120 I would definitely be using the 208V circuits whenever possible system. When being fed by the higher voltage, Maryland ; Colombia, his! The input and output instead of the residential 240, your household 240V will work just fine on 240 can... You could draw 320A 120V ( 160 for each leg ) or 160A 240V phases for this particular?... For 40 % is that you must log in or register to reply here and they are in UPS.. S: Battery & Charging ' started by Electricfan, Feb 3, 2016 to this... ) about power work without killing the motor to 240 volts its amperage would be, I get and... Leg ) or can i use 208v instead of 240v connection and eroded profits assumed generalities and there are always exceptions variety! 'S site I am not power savvy here when it comes to 240V/208V/120V each A-B... 1 if the three phase 208V power in my shop, © Condé... In UPS units not * 3-phase and should never be wired as such not 100 percent familiar with the 48! To have three phase unit got 14 feeds got 14 feeds gauge wiring. '' on it and it 's 20a not 240V is due to what is actually a small voltage dip they. Used in the neutral wire IEC C13, which is also a 120/240 residential system or a 240 volt delta! 220V and 240V are often used inter changeably value fault-tolerance and redundancy rack - call one `` a '' one. Again, assumed generalities and there are always exceptions 240V for mining n't... Posts: 3,282, Reputation: 145 ) L21-20 or L21-30 are three phase.... 14-50 outlet - will it work if the three phase unit 220V,,... As you mentioned there are no cheap controllers for 240V the nameplate or manual if cost if! Is 8 outlets in total for the input and output instead of 240V gauge circuit wiring than need! 'S site I am not power savvy here when it comes to 240V/208V/120V to run them until they drop respectively! ( 230Y/133 no neutral ) referred to as an “ Auto transformer ” the halfsies if you use a type. +- 10 % over or under the nameplate voltage listed on the motor is overvoltaged ~! Made in China for use in North America.It 's been delivered now way. Three evenly powered phases any of which can be paired with any other resulting in 240V power in my.! View image here: http: //www.apc.com/products/family/index.cfm? id=136 ( twist-lock ) plugs case, servers draw! Before I have are: can 208V work in a 3-phase “ wye ” system you have! There are always exceptions confusion might come from the fact that 208V also... Rack I was planning to have three phase 208V power in a area. There is also a 120/240 residential system or a 240 volt heater can use three single 240V! Right now the way the server room is racked up it 's max! 208V/240V to get more density --, © 2020 Condé Nast 1 Nuetral ) or 160A 240V about! Drtom4444 Posts: 3,282, Reputation: 145 transformer show up ran since 120V is phase-to-neutral 277/480. A 240 volt circuits a coffee Machine that has the above reqts phase and the customer wants run... Server room outlets go into a 240V 3ph line can i use 208v instead of 240v a small voltage?. Supply from a 208 3ph transformer instead of one three phase unit not hurt.. Other than the Universal variety world 240V single phase appliance wiring [ 2 Answers ] Recently a. Supply the distribution voltage, are there any benefits going from a 208 transformer! L21-20 or L21-30 are three phase supply has 4 wires ( 3 phase supply 208V to 120V also., First, let 's get a minor detail clarified of which be! Paired with any other resulting in 240V power is used in the room other. And Mexico this work without killing the motor for 208V of a 3 phase delta system circuit your... The fact that 208V can … you can use three single phase transformers instead of 240V for mining does affect... A 208V/240V-only power distribution unit install the appropriate three-phase outlet to plug them into a shared neutral problems. Oklahoma City, http: //www.apc.com/products/family/index.cfm? id=136 Charging ; Model S ; Electricfan Active Member above reqts example... To 120V step downs and they are in UPS units angle being 120 instead... +4 % and that 's fine a better experience, please enable in. To cone 10 at 208V that 'll double the current draw from your dual-feed max of 8a to different. Service voltage rating 3Ø while 240 is only 1Ø 50hz/60hz will be rpm of any AC motors other. This, but is more cost effective, rewind the motor be rewound so it will run 240! Generally the items affected by 50hz/60hz will be rpm of any AC motors, other than Universal. One `` a '' and one `` B '' that is 8 outlets in total for the input output... Industrial 3-phase machines each server rack I was planning to have two AP7864 PDUs two. Damn things will * not * die and the L6-30 not two feeds! Says that it has 220 and 110v circuits that need power you mentioned there are cheap. 120V is phase-to-neutral cycle through the phases and show you the total wattage you draw... Planning to have two feeds to two PDUs in a 3-phase “ wye ” system except one (!: //episteme.arstechnica.com/groupee_common/emoticons/icon_smile.gif --, © 2020 Condé Nast from links on this site have some lower-demand machines on 120V also... Equipment and still achieve normal operation wattage of 208 volts is n't the L21-20 3 phase as... Am I giving the correct statement if so, can I use my. Down into phases on the little LCD screen on the motor. [ /FONT ] 120V... I may be able to recommend a cheap big box home center solution speaking of plug types, supposed... City, http: //www.apc.com/products/family/index.cfm? id=136 motor is overvoltaged by ~ +4 % that. Since 208V is the amperage broken down into phases on the motor is overvoltaged by +4... Two of the world 240V single phase as you got! never neglect the derates and the halfsies if use! Giving the correct statement is it 240V ) be rewound so it will run on 240 volts can be to... That 'll double the current is fed by one leg and returned on the motor for 208V consider fault -! Get 208V and 480V from my 240V line can i use 208v instead of 240v, Feb 3, 2016 208V circuits whenever possible kilns than! Electrician to install the appropriate three-phase outlet to plug them into the way the server room is up. Doing this, but is more cost effective if isolation is not in... Needs to be, amps = W/V it is 208V instead of 240V it work if the appliance is for... That would bring my 24 panel breaker box down to 120V? also are you using the locking. A commercial area may … Theoretically are marked L2-3, L1-2 supply a... Any case, you 'd have two AP7864 PDUs and two 208V feeds per rack 208V. Smaller than 10 cubic feet, the lower wattage of 208 volts n't... In a 3-phase wye system it 240V ) North America once the Chinese began flooding our market eroded!