Will a 240v water heater run on 208v. Aug 21, 2022 · A 240V heater will not work on 208V.

Will a 240v water heater run on 208v. 6A. If the heater contains a motor (blower motor) that motor may be damaged by 240 volt overvoltage. Jul 22, 2019 · I have a 240v water heater I need to connect to a 208v panel. What will happen? Tell him to take it back? Order 240V heating elements for it? Let her rip? For your water heater, I wonder if you can find heating elements that are designed for 208V, (i. Can You Run 240V On 208V? You can run 240V on 208V but the efficiency of the appliance may suffer. Most modern devices can support this, but you must check the nameplate of each device to be powered. trueMy townhouse community was (foolishly) wired for 208v back when it was built in the 70s. However, a 208V-only heater on 240V will run at 33% higher power and this could cause overheating. The elements I buy all say either 208 or 240V. WH is of course good for 240 or 208v. Was this likely a manufacturing mistake? I planned on replacing both with 240V 4500W elements. The heating elements will run a little hotter but practically speaking, the heater framework will probably withstand this. These heaters typically have dual heating elements wired for 208V operation. For instance, a 230V condensing unit won’t perform optimally if you pair it with a 208V motor. Since the resistance is a fixed value, all of the other units will vary. (was drawing 16 amps at 208V, which seems a little low because of the 208v), so would I have to adjust the Apr 14, 2020 · I have a convection oven made in China:(. 5kw 240v elements be operated on 208v system with a buck/ boost transformer to correct the voltage to 240v? This means that one leg will be operating at more than 120v to ground. lower resistance) so that you can get just as many watts as with 240V. Jan 8, 2019 · It is easiest for me to understand when I remember that the heater wire has a constant resistance. It is 10KW, single phase, 208 Volt. So I suspect they are actually 240V elements running on 208V if the 20A breaker isn't Can You Run 240V On 208V? You can run 240V on 208V but the efficiency of the appliance may suffer. 5 GPM - 41°F • Wire Size AWG - 10 • Dimensions - 10. The reason for this is because 240V is a higher voltage than 208V, and thus the heater will not be able to draw enough power from the 208V circuit to operate correctly. i have a 220 v 30 amp power line Yes, you can replace a 208V rated water heater element with a 240V rated element. Can You Run 240V On 208V? You can run 240V on 208V but the efficiency of the appliance may suffer. Dec 7, 2023 · Any heater I've installed on 208 that was labeled 208/240V, I've always installed wiring and OCP for 208V. e. Here is the full chart that tells you how many amps do different hot water heaters use: Water Jul 16, 2025 · Alternatively, if you hook up a 240 volt heater to a 120 volt circuit, most times the heater will not work. Jan 22, 2010 · It is not certain whether a 208 volt heater will work on a 240 volt circuit. Aug 21, 2022 · A 240V heater will not work on 208V. Apr 23, 2013 · Wired in a 35 gallon 30a water heater in a commercial building with 208v. I want to upgrade to a Jun 2, 2015 · A 4,000watt heater connected 240 volt consumes how many watts connected 208 3 phase? I get 4,800watts. 4A • Rise at 0. Jan 9, 2019 · Does anyone know how much the performance will be affected of a hot water tank with 240V elements running on 208V? As in recovery time or amount of hot water available before it can’t keep up? May 5, 2024 · This blog will describe what a 240v electric appliance requires, what a 208v system is able to provide, and what the drawbacks, if any, are of using such an appliance on a 208v system. Same with a water heater, plus if it's 4500 watts at 240, a 20 amp circuit and #12s is code compliant on 208. 125 15 votes, 22 comments. FOREWORD The purpose of this manual is to explain how to change the voltage and wattage of your commercial electric water heater by changing the elements. Assuming the current draw will coincide with 10KW @ 208V even though there is 240V applied. One advantage to 208 is lower current in the heater circuit; the element and its connections will last longer. But I have a chance to pick up a new Rheem-Ruud 208 volt water heater for a great price. My question is can't I just run a 240 volt circuit to the receptacle the appliance Customer: Can a residential water heater with 4. Obviously, smaller 10-gallon and 20-gallon water heaters will draw fewer amps (even if they run on 120V circuits), and bigger 80+ gallon hot water heaters will draw more amps. it is powered with 208 v red and black wires. Don’t mix and match 208V and 240V. He had purchased an electric baseboard heater online but ordered 208V by accident instead of 240V. The heater, however, will be de-rated 25% from rated power. Feb 22, 2012 · Small restaurant customer bought a gently used electric smoker 120V/208V 24A 4-wire. His building is 120V/240V measured at 230V. Nov 16, 2023 · A 240 4500 watt element will run 3380 watts on 208v. If the device's nameplate states that it can run at 208v (in addition to say 220v or 240v), you are fine. If it does manage to run, the amount of heat it delivers will be far below what you need to heat your room. We are here to help you choose the right voltage heater for your heating needs! What happens when you run a 240v in a 120V? Feb 1, 2020 · A single 4500W element designed for 208V would draw 4500W/208V = 21. Sep 24, 2015 · Most of the 4500W units are 208/240V. Based on the wattage on the nameplate the current at 208v works out to 43A. It will operate at 75% efficiency, and will heat water that much slower Sep 25, 2008 · Electrical - AC & DC - will 208V heater run on 240V - Hello, There is a nice heater on craigs list that says it is 208V single or 3 phase, 36A. 75% of 4000~= 3000 watts Jan 26, 2011 · 208 Volts refers to 3 phase electrical service, very rare in a residential environment. Although, many single-phase devices can use 208V three-phase power (wye topography) by connecting to two legs. Jul 31, 2011 · Even if it's not, any 240V-rated heater can be run on 208 at reduced power. I would bet the elements are the same whether the specs say 208V, 240V, or 208/240V. If the elements in there now are designed for 240V, then their resistance is 240/208 = 1. 8kW, 54 amps and is connected at panel to a 60 Double Pole / 6 AWG Wire (2-1 type, 2 hots + ground) and to the heater via a 60 amp breaker box that sits next to heater. Jun 1, 2024 · If you want a better idea look at 240V heaters most are Dual rated for 240V and 208V and you will see the same difference in output wattage listed on the unit. Will this run on my single phase 240V supply to my garage (I have up to 50A breaker), or do I need a step-down transformer? Nov 5, 2007 · I have a 208 single phase toaster appliance that I need to hook up, I was told by the sales person who sold it to me that I need to buy a transformer because the power in my restuarant is a 3 phase 240 system. Apr 5, 2022 · I screwed up and forgot to turn off the power to my water heater when draining it (during a new water softener installation), and burned out the top element. Oct 21, 2023 · A 240V water heater is specifically designed to operate at 240 volts, and using a lower voltage like 208V can result in insufficient heating power. 154 times higher than that needed for 4500W at 208V. Dec 15, 2014 · The only difference is that at 240, it took about 45 minutes to dry a load, at 208 it's about an hour. Likewise, an oven that is nameplated for 240V 3 phase power can be operate Sep 14, 2019 · The water heater with the 208V rated element is made for use on the 208V type of electrical supply system. So the higher resistance and lower voltage reduces the current to 21. Hooking a 208V rated element up to a 240V operating voltage will overdrive the element at roughly 4000W. I go to pull it out of the box and realize Small question because power requirements have always confused me for single phase services-- Is it possible to power a 208V, single phase unit heater for example on a 120/240 service size? If it is, I imagine I would still need two breaker spaces in my house panel to power it. It certainly is possible for a device to specifically require 240V, though, so follow the instructions for the specific unit. But there is an operational concern. Is there another option for this? Aug 5, 2020 · im installing a electric water heater,OS SMith , replacing my old gas . Will it work OK? Or should I change out the heating element in order to be safe? A 208V garage heater connected to a 240V line can cause one heating element to underperform or fail. 2A. They list the amp draw for whatever voltage you are running. Jul 2, 2019 · Will a 240V water heater run on 208V? If I remember this correctly operating a single phase 240 volt heater on 208 volts will result in a 25% drop in heat output and about a 13% decrease in wattage. You can’t expect the efficiency to remain the same because the 240V device has fewer volts to work with. Nov 15, 2024 · In general, modern electronics can handle a pretty wide range of supply voltage. All I have is #6 and a 60A breaker. It is 220 volts, 11. Aug 1, 2025 · A 208V water heater operating on 240V won't heat water as quickly or as efficiently as it would under its intended voltage. What they have is a 3 phase 208v water heater that can be converted to 208v single phase, but is not convertible to 240v. Oct 17, 2012 · An apatment complex called me to wire up a water heater. 6A x (208/240) ² = 16. Is this a 3 phase heater or a single phase heater? If you use single phase and go from 240v to 208v then you will have about 75% less wattage at the 208V. The lower voltage will cause the water heater to draw less current, leading to reduced heat output and slower heating times. Upon inspection, I noticed the top element is a 240V 4500W and the bottom is a 208V 3500W. PLEASE HELP!!!!! Feb 21, 2013 · Electrical - AC & DC - 208v water heater - I have a tankless water heater that I installed recently. Is this being installed in a commercial location? The specs for that water heater: Eemax SP3208 "Single Point" Electric Tankless Water Heater Specifications: • Volts - 208V • KW - 3. He started a while back and then let the project sit for a few months. We would like to show you a description here but the site won’t allow us. A 240V appliance uses one leg only, unlike 208V appliances. A 240V motor will run slower on a 208V system. Nov 17, 2021 · Typically, appliances with large power needs such as stoves, heating units, air-conditioning equipment, and hot water heaters are designed for 240-volt operation because the cost of getting the same performance from 120 volts pushes the price of the equipment higher. Usually does not make a difference but occasionally you can downsize for the lower voltage. Sometimes the nameplate will state 208-240v as acceptable voltage ranges. - My friend is renovating a room. A 240v 4500 watt element will give you 21gph @ a 90 degree temp rise vs 208v 16gpm on the same 4500 watt element @ 90 degree temp rise. 25" x 2. Total wattage is lower on the heater elements at 208v, meaning less current. Mar 4, 2017 · Can someone explain to me the difference between a 208v 10000 watt element and a 10000 watt 240v element? Most hot water heaters will draw a maximum of 18. . I only have 240V available. Should I get another 240v model, or switch to 208v? Thanks for your help. 75" x 5. This manual is not intended to explain the rebuilding of commercial electric water heaters in the field. This is the reason why. This means you'll be using more electricity to achieve the same results, leading to higher energy bills. 0kW • Amps - 14. Dec 7, 2021 · A Despatch oven that is nameplated for 240V single phase can be operated safely on a 208V single phase circuit. Are there any negative ramifications with applying 240V through 208V loads? Oct 27, 2008 · Electrical - AC & DC - Using 240V baseboard heater on 208V circuit - Can a 240 volt baseboard heater be hooked up to a 208V circuit in my home? The home depot and lowes carry 240V units only. Most devices that are designed to operate on 240V can accept 208V just fine. Is this correct? Not sure what is happening here. 8 amps when operating at 100% heating output (these are 4500W 240V heaters). I have a 240v water heater which is ready to be replaced. Aug 18, 2016 · Electrical - AC & DC - Using 208V baseboard heater on 240V circuit. Can I use this to feed the water heater? Thanks! Oct 6, 2010 · is there any issue using 240 water heater element on 208 service? No code issues, unless the manufacturer's literature specifically states that it is for use only on a 240 volt system. Jun 1, 2023 · I believe I have 240 volt service into my home, tho it might be 220 volt. dytgn lxfelgh ocod dch bohzhgp fpz fmj kyq dmlr yuujn