The best answers are voted up and rise to the top, Not the answer you're looking for? With electrical loads, the voltage will drop, hence the common reference to voltages below 120 and 240, such as 110, 115, 220, and 230. @SimpleJack electrical-engineering tag added, thanks. The depth of the working space in the direction of live parts shall not be less than that specified in table 110.26(A)(1) unless the requirements of 110.26(A)(1)(a), (A)(1)(b), or (A)(1)(c) are met. However, 240V requires more wiring, especially if you want the system to transmit electricity over long distances. The last thing you want is to empty your bank account by accruing unnecessary repair and replacement expenses. Appliances last longer because the power transmission is more consistent. Can you use 220 volts in a 240 volt system? 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). However, you may visit "Cookie Settings" to provide a controlled consent. Single Phase power is a two wire Alternating Current (AC) power circuit. Asking for help, clarification, or responding to other answers. 1200 lots. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Web220-230-240 (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).Most devices designed for 220 will run on 208 and in shops all over the place this is commonly done.. Also, Will a 208v motor work on 240v? under 10HP) 3 phase motors are not all that expensive and will use less power than the single phase motors you currently have. 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). From the *general* electrical panel clearances given in the article above we have For example, a 240V well water pump that paired with a 208V system eventually failed. Use MathJax to format equations. The cookie is used to store the user consent for the cookies in the category "Analytics". If you continue to use this site we will assume that you are happy with it. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A 240V motor will run slower on a 208V system. Any appliance that is rated for 240 volts and can also be used on a 220V or 208V outlet. I am ready to do a major renovation. Equipment that is accessible from the back or sides (such as some dead-front switchboards and motor controllers) in which ALL of the replaceable or repairable or adjustable parts can be accessed from locations OTHER than the BACK OR SIDES do not require working space on the BACK or SIDES of the equipment. I've not seen an electrical inspector object to those. InspectAPedia tolerates no conflicts of interest. I want to move the washer and dryer closer to the panel. If your equipments manufacturer has made the same claim, feel free to run their 240V appliances on a 208V electrical system. Given the extreme frequency ranges that VFD motors see, I don't see a problem with 50Hz/60Hz changes if the proper V/Hz ratio is maintained. See th Even though 240V is numerically larger, the system appears in residential settings. However, it is still possible to connect 208V single phase to a device from a three-phase supply. This cookie is set by GDPR Cookie Consent plugin. Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. As the diagram below shows, the connection from any live wire to neutral produces an end voltage of 120V. Your email address will not be published. In some countries, 230V is the standard single phase voltage with one 230V power wire and one neutral wire. What is causing the plague in Thebes and how can it be fixed? They refused to replace the pump despite the presence of a warranty because it ruined the motor by running it at a low voltage. JavaScript is disabled. Is Three Phase Electricity More Expensive. And if it stops moving, subsidize it. Appliances with motors are not cheap. Only one image can be added per comment but you can post as many comments, and therefore images, as you like. After the balancing caps are added, I think my voltage will be close to 242 volts. 208V is obtained only for a three-phase supply. The control transformer could very likely be connected 240 as well. Im specifically wondering if this impedes working space clearance for the panel. 208 usually denotes a voltage available in commercial buildings with three phase service. 220V circuit requires two live/hot lines. I have a well with a 1.5 HP pump. I think we need to take that route because you're not going to find this detail in the electrical codes. WebThe majority of devices designed for 220 will run on 208, and this is common in shops all over the country. Ask Your Own Electrical Question Customerreply replied 4 years ago Am I calculating the power required and power out for a peristaltic pump correctly? Note: appearance of your Comment below may be delayed: if your comment contains an image, photograph, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. WebYou can run 240V on 208V but the efficiency of the appliance may suffer. 220 and 240 are the same thing. If the motor is under a light load, you will likely never notice. NFPA 70: National Electrical Code 2017 Edition, is available from the NFPA - http://catalog.nfpa.org/NFPA-70-National-Electrical-Code-NEC-Softbound-2017-Edition-P16529.aspx but keep in mind that in the U.S. your local jurisdiction may be operating under an earlier edition of the NEC. However, 208V refers to a different system voltage level. I would say yes, you can operate it off 208 volts, but your torque will be down and you would need to be careful not to overload the motor under heavy cutting. Three electrical legs (phases) are evenly spaced in a circle around a center (neutral) of 208V 3 Phase power. Can you use 208V on 220V? Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother. 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). Your email address will not be published. By the way, we also have galvanized water lines and spigot located within inches of the panels. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. In many cases an appliance made for 220 volts 50 hertz will work fine at the same voltage but 60 hertz. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookies is used to store the user consent for the cookies in the category "Necessary". Please bookmark this page to make it easy for you to check back for our response. Why did US v. Assange skip the court of appeal? 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 3 motors rated 220/440V will be fine on either a 208 or 240volt supply when connected for lower voltage. The best way to thin chocolate is to add a fat. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? 208V and 240V are different electrical systems. RE: Can you run a 3 phase 220v motor on 208v 3 phase? The cookie is used to store the user consent for the cookies in the category "Other. With electrical loads, the voltage will drop, hence the common reference to voltages below 120 and 240, such as 110, 115, 220, and 230. It is even sort of odd that the motor would be listed as rated for 200V. However, 208V refers to a different system voltage level. This question was posted originally at ELECTRIC PANEL INSPECTION. The uppermost surface of the toggle switch that operates the highest-circuit breaker in an electrical panel can be no more than 6 ft. 7" above the finished floor surface. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. These cookies track visitors across websites and collect information to provide customized ads. It does not store any personal data. Purely resistive components (like heaters) will run at a slightly lower power. Most newer motors will run 208-240 just fine. Keeping this in consideration, will a 240v stove work on 208v? Is it possible to run 240-volt equipment on 208-volt power? Even more problematic was the pumps manufacturer. Please take a look at the sketch with measurements annotated on it as well as text found at the top of this article. This sounds like an inconvenience, but it can cause lasting damage. Thus, this configuration presents a way to attain 208V and 220V single-phase. Working space or safe clearance distances are required around all electrical equipment that is likely to require examination, servicing, adjustment, or maintenance while the equipment is energized. You wont get the power you desire. As power demands from clients vary, so do the application of these standard voltage levels. Current flows without a neutral in a single-phase 208V circuit due to alternating voltages of the two live lines at opposite times. Note that 230 volt motors will work just fine on 208 as long as it is not at the low end of what is acceptable for 208 volt systems. If the manual says 208V, use 208V. Configuration has two live wires for single phase, and three live wires for three-phase. That power loss makes 240V more costly because the voltage drop will harm your appliances. In North America, the terms 220V, 230V, and 240V all refer to the same system voltage level. ELECTRIC PANEL WORKING SPACE at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Best Answer. But what about 208V? It may very well be listed as 120/208-240. 4-77 1977 [Lots of sketches of older-type service panels.]. You will see differences in performance if you try to use 208v when 240v is typically required. This is a NEMA requirement. @AndrewCone, the typical way to check motor amps is putting a clamp-on meter over a wire. Fight the urge to interchange single-phase and three-phase equipment. Something mechanical? In North America, the terms 220V, 230V, and 240V all refer to the same system voltage level. In North America, the terms 220V, 230V, and 240V all refer to the same system voltage level. The width of the working space must be EITHER the width of the equipment OR 30" - whichever is GREATER. After that, the question is whether you can run a 220v motor at 208v. A single leg of three-phase power yields 240V single phase. What's the distance between two 460VAC / 10HP Motors side by side.Is there a min. Final legal authority to answer the question of whether or not a water pipe can be considered to block access to the electrical panel is in the hands of the local electrical code compliance inspector. Home | About | Contact | Copyright | Privacy | Cookie Policy | Terms & Conditions | Sitemap. Single-phase power uses one wire. These are not exact but you can see the difference in speeds. All our single-phase 220V motors will operate on either a 208V or 240V nominal power supply, which are the most common types available in North America after you move up in voltage size from 110V (or 120V). Your local electrical inspector is the proper and final legal authority whom you should ask. 240 volts can be obtained from either a 120/240 residential system or a 240 volt 3-phase delta system. Technically speaking, you dont have to choose between these two options. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. IF you did need a neutral then you would DERIVE it at your secondary of your service transformer. The terms 220 and 240 are interchangeable. WebYou can run 240V on 208V but the efficiency of the appliance may suffer. The system can transmit large voltages more efficiently. If it says 240V, use 240V. Is 208v the same as 230v, which is the subsequent question? Try connecting two phases of a three phase supply together to power a common load and see what happens. The model codes, such as the U.S. NEC, do not specify a minimum height for an electrical panel box or enclosure itself above the floor surface. 208V sees frequent use in small business commerical use in North America. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Can 220v be 3 phase? Heavier appliances require a line 1 to line 2 connection to supply a 240V (220V/230V/240V)single-phase. It is at floor level and against the wall. Electricity will reach your area using a three-phase network. The voltage will drop with electrical loads, hence the common reference to voltages below 120 and 240, which include 110, 115, 220, and 230. Whats the maximum current for a 220V motor? Although the nominal voltage is 240 volts, homes may have a 208, 220, or 240 volt power supply. 120/208V Single Phase Power. Residential settings in the US tend to prioritize 120V, whereas most locations outside North America prefer 220-240V. [DF NOTE: I do NOT recommend this obsolete publication, though it was cited in the original. Homeowners It may not display this or other websites correctly. This can be supported by most modern devices, but you must double-check the devices nameplate to be powered. Actually, the electrical panel can be installed at a higher position on a wall, but in that case a platform is required . WebA 208V three phase motor is connected to all three hot busbars plus neutral and ground wires. For those who are wondering, RMS essentially means "average ac voltage" (the equivalent energy of DC). It will be hotter on 240 volts compared with on 208 volts. Running slower decreases the counter EMF (back emf?) Most modern devices can support this, but you must check the nameplate of each device to be powered. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The voltage is 277/480 volt in larger facilities, and it is used to power single phase 277 volt lighting as well as larger HVAC loads. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Due to the small size of our lots (30 ft by 65 ft) it is very common for a fence, a hedge, or an RV slide to be within a foot of the outdoor electrical pedestal. Most often asked questions related to bitcoin. The designation L normally means Line which usually has a hot from the circuit attached, not a neutral. The important dfference, othere than maybe having too high or low a voltage, is that one of the input leads is either ground referenced or both are hot. just a quick comment on 200V versus 208, etc. WebI was just wondering what the effects would be of running a motor with nameplate values of 220V @ 50Hz on a system that is 208V @ 60Hz. How many times should a shock absorber bounce? You cant expect the efficiency to remain the same because the 240V device has fewer volts to work with. OPINION Where does it fit in this equation? Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. There is no specified height above floor to the bottom of the electrical panel enclosure. 2' 6" (30") total width around the electrical panel sides, with the note that the panel does not have to be centered in the space (see our distances A B in our illustration). Any appliance with a 240 volt rating that can also be used on a 220 or 208 volt outlet. Depends on your power source as to how dirty this might be. "Simplified Electrical Wiring," Sears, Roebuck and Co., 15705 (F5428) Rev. This isn't a DIY site, but I,will say that the voltage will likely work fine but the higher frequency will cause motors to run faster by 1/5. here are the things to check: to begin with, disconnect the 240 VAC power and apply an ohmmeter to the SAME motor terminals to which you had applied the 240VAC power. Ask the manufacturer for clarity. If it runs near it's capacity it will overheat and gets damaged quicker. 208V is a line to line voltage of a 208/120Y system. In any case, the voltage in each line peaks at different times, with a 120 difference between their waveforms. However, 480v. For a single phase, when one of the lines peaks at 120V, the other produces 88V, thus producing a combined total of 208V.
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