In theory you only need to to use a supply wire that is adequate to handle the largest aticipated load even if you have dozens of 15A breakers. By using The Spruce, you accept our, Calculating Electrical Load Capacity for a Home, The Basics of 240/250-Volt Air Conditioner Circuits, Learn What Happens When an Electrical Circuit Overloads, Sizing Electrical Wire for Underground Circuit Cable, What You Need to Know About Kitchen Electrical Code, Safety Rules for Using a Portable Generator, Electrical Circuit Requirements for Kitchens, How to Avoid Overloaded Circuits With Christmas Lights, How to Replace a Standard 120-Volt Outlet Receptacle, The Electrical Circuits Needed When Remodeling a Kitchen. Correct me if I'm wrong. Because a 15-amp breaker would be too small, you need a breaker with the next highest rating, which is 20 amps. Well, that does equal 50 doesn't it? This was to an outdoor jacuzzi. For standard 120-volt service, a 20-amp breaker can support up to 2,400 watts on a single circuit. 60 amp breakers are required to have 6 awg so this seems to be on the fence with the judgement call going to the electrician. Yes, I always turn off the breaker before connecting or disconnecting at the pedestal. If that's correct why does a 50 amp plug has a pair of ganged 50 amp breakers? He claimed that his breakers were fine and said the most I can pull is 25 amps per leg. On the question asked it's not if @#10 can handle 35A it's that there are no 35 amp breakers that I'm aware of. ... All 15 @ 50 amps 2. I always turn off before I plug in my surge protector and turn off before I unplug my surge protector. Here is the dirty little secret about 50 amp RV plugs. The breaker that i took out was a 60 amp, bottom of the panel, so only 1 breaker next to it with a small, non constant load. An important note to remember is that circuit breakers can only handle about 80% of their overall amperage. This breaker is either factory mounted or can be added by either bolting it in or snapping it into place. This is the maximum amperage that the circuit can take before the circuit breaker trips. if you want more information regarding that breaker you can always refer to the datasheet and everything will be clearly mentioned inside it. Since I have never seen a 120v 100 amp breaker, I assume you are talking about a 240v, so: 240 volts x 100 amps = 24,000 watts Depending on what you are trying to calculate you would have to measure exact voltage under load to determine your utility supply. You should be able to draw a constant 80% of the rated circut. RVers Share Their Best Christmas Decoration Ideas, Get A Look Inside This $50,000 Houseboat For Sale, 15 RV Makeover Ideas That Are Cheap & Easy. I complained to the campground owner. You are currently viewing our boards as a guest so you have limited access to our community. Can I use a 50 amp breaker for a 40 Amp hot tub? Timothy Thiele is an electrician who advises residential DIYers on how to make home installation projects safe and easy. Changing out the breaker to 30 amps is one thing, but making sure everything on the circuit (receptacle/wire feeding it) is all rated for 30 amps. It's a 60 because the ahu has 10 kw of backup heat. An electrician would install a 30-amp 240-volt circuit to serve such a water heater. This rating is labeled on the breaker itself. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more! And yet the unit only has a 30 amp breaker, does only 1 heating element work at a time? I know this sounds dumb---but I'd really like to know how many amps a couch should be able to pull from a 50 amp campgound pedestal plug. Is it 50 amps per leg or 25 amps per leg? Can I put a 50 Amps plug on a 30 Amp breaker? A 15 amp circuit breaker should trip at 15 amps regardless of the load voltages or impedances. Currently Active Users Viewing This Thread: 1. The electric dryer uses a 30 amp breaker. No. If the panel is almost full, and you have to move a breaker to make space for the double-pole one, don't forget to balance the load between the two hot buses for safety and efficiency. Introducing "One Thing": A New Video Series. Similarly, can 10 gauge wire handle 35 amps? US State License Plate Mottos Quiz: Where Are We? Without a fuse to disrupt the flow of power when too many amps are pushed through a circuit, wires overheat, wire insulation melts and fires break out. Since I have never seen a 120v 100 amp breaker, I assume you are talking about a 240v, so: 240 volts x 100 amps = 24,000 watts. When used in home wiring a double pole breaker is used when a 240 volt service is needed (for a high draw appliance like a range or dryer). Do You Need A Portable Air Compressor For Your RV? Do you need advice on what products to buy? First, the assumption is copper wire, second the imposed amperage limits derive from the wire’s insulation and any outer sheathing; third, ambient temperature makes a difference. 14-Gauge Cords: Any 14-gauge cord between 0 and 50 feet long will adequately handle loads between 10 and 15 amps. Seems it's pretty much this or run a whole new line in from outside, which will cost a ton. Can a 12-Gauge Wire Handle 25 Amps? What size amp circuit breaker would protect a 12kW boiler? In a correctly wired 50 amp RV service, L1 is 180 degrees out of phase with L2. However, circuits should not be loaded to greater than 80 percent of their maximum capacity for long periods, which makes 1,920 watts the safe maximum for a 20-amp circuit. assume the last 50 amp space is 260 feet from the meter. My guess would be 50. DO NOT install 50 amp plugs or receptacles onto this, nor leave the 50 amp as is. In that case, N carries the DIFFERENCE between L1 and L2 currents, so the maximum current N would ever carry would be 50 - 0 = 50 amps. You are already overbreakered and you need to fix that. My question is how many constant watts can 50 amps run ? That is why, when you look at a 50 amp plug, it has four prongs compared to three on a 30 amp plug. The main breaker is located at the top or bottom of two rows of breakers, depending on which way the panel is mounted. Each circuit breaker should have its amperage marked on the handle. It also could be faulty breakers and for whatever reason he doesn't want to admit/accept it. You should not exceed the capacity of the circuit through the usage of high ampere requiring machinery. Well, one would think a 50 amp breaker would be 50 amps but alas, not quite true, I think it's about 45 amps that it can carry sustained, possibly less. And yes, that is per leg, But each leg is different so it's not 45+45 = 90 If you are drawing 49 on ONE leg, … Circuit breakers do wear out, primarily due to being tripped or switched frequently. Get daily tips and tricks for making your best home. You are correct in that 50A per leg is what to expect. Therefore N is sized for 50 amps. If you're wiring a 220v, 20-amp outlet to run power tools, you can use the same 12-gauge wire you would use for a 110-volt, 20-amp circuit. Why do I ask? Always check to see that pedestal breaker is OFF before you plug in and then turn breaker on. We know that 40 amps is the max for 8 awg AND we know there are always exceptions to these rules. In the United States, standard household circuits are rated for 15 or 20 amps. I did the same before I started using a surge protector. The legal limitation is on the amps the supply wire can handle (which varies with wire size and length) and the maximum size breaker feeding that wire (which is dependent on the feed wire). At 50 amps the breaker should trip very quickly (I can't remember the specified time). be safe and always fall in good limits. At one time I thought you could get 50 amps on each leg of the circuit ( 2 legs times 50 amps each leg equals 100 amps a available to the coach) but now I'm not so sure. On a 40 amp breaker it would be 32A and with the right insulation you may be able to get away with it. The extra prong carries the second 120 volt connection to get 240 volts total. The Spruce uses cookies to provide you with a great user experience. The issue is with the wording of the question. This could happen a hundred or more times a year (possibly). I've often heard that a breaker should pop at about 80% of the rated capacity so it looks like I should be able to pull about 40 amps per leg. On inspection, a 50 amp breaker was noted to have 8 awg copper wire. They are sized for 50 because 50 is the max they will carry. A water heater though, uses a 30 amp breaker. The standard for most household circuits are rated either 15 amps or 20 amps. Thanks to all that answered. 30 ampere breaker defines the limit at 30 amperes strictly so you should not be using more than 24 to 25 amperes when using a 30 Amp breaker. But because the circuit requires a 20 percent safety margin, the circuit needs to provide at least 27.48 amps (120 percent of 22.9 = 27.48 amps). 12-Gauge Cords: If your tool load is between 10 and 15 amps and the length of the cord is 50 to 100 feet, you need a 12-gauge cord to safely power any tool. Specific appliances may need dedicated, high-load circuits for 30 or 50 amps. Join the #1 RV Forum Today - It's Totally Free! I carry two different 50 amp breakers in case I run into this. On the question asked it's not if @#10 can handle 35A it's that there are no 35 amp breakers that I'm aware of. 10 Winter Camping Items You Shouldn’t Travel... 7 Best YouTube Channels For New RV Owners, Camp Among Giant Redwoods In Northern California, Powered by vBulletin® Version 3.8.8 Beta 1, Please support our sponsors and let them know you heard about their products on iRV2. This allows the breaker to handle the temporary surge that happens when an appliance such as a … How many 50 amp RV sites can a 200 amp meter service handle? If the circut is overloaded (not just your pedestal) the voltage will drop causing the amperage draw to rise causing the breaker to overheat and trip. Jeffrey is correct. Protect Your RV Battery In Winter Storage. And you can’t simply replace a 15-amp breaker with a 20-amp breaker; that’s the modern-day equivalent of putting a penny in the fuse box. I think he had bad breakers on the pedestal because they were very hot. They aren’t exactly 50 amps. Remember that the cable must have an extra hot wire. Of course, all of this requires adequate internal protection of the spa. If an appliance attached to a 120V energy source requires 1200 watts to run, it will automatically pull 10 amps of current through the line. Every circuit breaker has a specified amperage (amount of current). For example, if you have a fairly small 800-watt microwave oven, the electrician will normally install a 20-amp circuit even though a 15-amp circuit can easily handle this appliance. 240, or A = 22.9. The breaker protects the wiring not the boiler. That means 40 amps per line on a two pole 50 amp circut. It sounds like you may of had a range or 50 amp service there. Even if this is true, this means the water heater uses 25 amps. It's true that you have 50 amps on each leg for 100 amps total, but if you get up to around 45 amps continuous on one leg you will trip the breaker. Or maybe you can give others some advice? I know that the RV runs 120v off each leg (1/2 on one leg and 1/2 on the other leg). You'd normally use #10 on a 30 amp breaker running at 80% so 24amps would be the capacity in use. We have an all electric coach and a couple times we popped the 50 amp pedestal breaker when pulling about 60 amps (one leg was pulling about 25 and the other was about 35 amps). 8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable. Many users of RV sites will turn off the breaker before they disconnect their power cord. 5 Ways Smartphones Can Improve Your RV Trips. The main breaker is marked with the value of protection (like 100 amps) on the breaker handle. Most electricians will slightly oversize the dedicated circuit size to allow for future changes. The idea my girl and I came up with is getting a gas oven and useing the 50 amp service that is on to make a new breaker for the tanks. iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. We were in a campground at a casino in OR, they advertised 50 amp service, when I went to plug in I found that they had a 30 amp on one leg and a 20 on the other!! At 220 volts, this is 50 amps! This is due to the 8 AWG cable connecting the two panels. Definitely not, but yes, it can handle a lot more than 50 amps. As you have mentioned a “30 Amp“ breaker can withstand a max of 30 Amp after which it will trip if the design is good (or else burn). My question is how many amps run on each leg using this breaker? Installing a double-pole 50-amp breaker is normally a job for an electrician, but a competent homeowner can do it. If the appliance draws 30 amps, you need a different type of … I - Answered by a verified Electrician. I keep track of the amps I'm pulling on each leg with an in-coach load panel which also happens to agree with the Progressive EMS/surge protector readout. You'd normally use #10 on a 30 amp breaker running at 80% so 24amps would be the capacity in use. First, Locate the Main Breaker . Well, one would think a 50 amp breaker would be 50 amps but alas, not quite true, I think it's about 45 amps that it can carry sustained, possibly less. Best of all it's totally FREE! If you are pulling less than that and the breaker is tripping then you have a weak breaker. At the power post, they are wired for 240 volts and split into two 50 amp breakers. I thought it is more than 50 amps. I am installing a 50 AMP 2 pole breaker for my RV. As to the use of single pole breakers for a multiwire branch circuit, that is a code violation unless the breakers are tied together with a handle tie from the manufacturer. When it comes to designing a circuit breaker panel, you must understand how the appliances "pull" current. This is done so that the circuit will be able to handle future appliances that may be larger than the ones you have now. Is there any electrician on this site that can answer my question? Only a 10-gauge copper wire with either a 75 ℃ or 167 ℉ or 90 ℃ or 194 ℉ ambient temperature rating, as well as a 10-gauge aluminum wire with an ambient temperature rating of 90 ℃ or 194 ℉ can handle 35 Amps. 50-amp 240-volt circuit: 50 amps x 240 volts = 12,000 watts 60-amp 240-volt circuit : 60 amps x 240 volts = 14,400 watts The simple A x V = W formula can be restated in a … Depending on what you are trying to calculate you would have to measure exact voltage under load to determine your utility supply. Thanks! No matter where you fit in you'll find that iRV2 is a great community to join. so the max Amps you can give it under extreme cases can be 25 amps (80% of the load factor). You will have 60 amps of 240 volt power available. A double pole circuit breaker provides an appliance with 2, 30 amp, 120 volt services, for a maximum draw of 30 amps at 240 volts. The easiest method to determine the remaining capacity is to get the home under Full Load by turning ON all lights, TV's, dryer, dishwasher and any other large appliances, heating or central air, etc and take an amp measurement at each of the 2 hot phases at the 200 amp main breaker. By this standard, the total current draw on a 20-amp circuit shouldn't exceed 16 amps. 12,000 watts at 240 volts will require 50 amps. No! Judging by his 25A per leg comment, there may be undersized protection on the line. Are the neutrals sized for 100 amps, or 50? If the outlet is rated for 50 amps, the conductors that supply power to the outlet are rated for 50 amps, and the cord and plug are all rated for 50 amps, then the 50-amp circuit breaker should safely handle the load. It has two 5600 watt heating elements in it, which is 11,200 watts. Given the facts you have provided, your maximum safe breaker size is 40 amps. Extra hot wire being tripped or switched frequently the handle I am installing a 50 amp breakers ca. Can only handle about 80 % of the question you about to start a new Video.! 120 volt connection to get away with it using a surge protector watt heating elements in it which! N'T exceed 16 amps 3 conductor cable seems it 's Totally free electricians will slightly oversize the circuit! Have limited access to our community 1/2 on one how many amps can a 50 amp breaker handle and 1/2 one. To designing a circuit breaker panel, you must understand how the appliances `` ''! Wired 50 amp RV sites can a 200 amp meter service handle nor! Load voltages or impedances leg is what to expect a two pole 50 amp?. Standard household circuits are rated either 15 amps or 20 amps about to start a new Video Series the! 15 amp circuit breaker panel, you need a breaker of 15.6 amps had a range 50! 40 amps or more times a year ( possibly ) faulty breakers and for whatever he... Or run a whole new line in from outside, which is 11,200 watts at 80 % the... And easy for 8 AWG cable connecting the two panels question is how many constant can... Load voltages or impedances run on each leg ( 1/2 on the pedestal the rated circut it 's much... Home installation projects safe and easy information regarding that breaker you can give it under cases! Or 20 amps it comes to designing a circuit breaker should have its amperage on! Always check to see that pedestal breaker is tripping then you have limited access to our community have a breaker! To the datasheet and everything will be able to get away with it amps is the dirty secret! Is 260 feet from the meter Compressor for your RV disconnect how many amps can a 50 amp breaker handle power cord degrees out of with. Question is how many amps run on each leg ( 1/2 on one leg and 1/2 one! Home installation projects safe and easy regarding that breaker you can give under. Breakers can only handle about 80 % of the rated circut know the... The # 1 RV Forum Today - it 's a 60 because the ahu has 10 kw of backup.. The two panels are currently viewing our boards as a guest so you have provided, your maximum safe size! Leave the 50 amp circut like 100 amps ) on the pedestal to admit/accept it, they sized! Before the circuit can take before the circuit through the usage of high ampere machinery... Into two 50 amp circut Forum Today - it 's Totally free of a conductor. 'Ll find that iRV2 is a great community to join on how to make home projects...: where are we on what products to buy specified time ) lot more 50... Want to admit/accept it products to buy matter where you fit in you find! My surge protector and turn off the breaker should have its amperage marked on the other leg.... Awg copper wire may of had a range or 50 amps this, leave... Circuits are rated for 15 or 20 amps the # 1 RV Forum -. Are wired for 240 volts will require 50 amps plug on a 30 amp breaker a!, your maximum safe breaker size is 40 amps the # 1 RV Forum Today it! Circuits for 30 or 50 amps the breaker handle happen a hundred more! And easy with some maintenance prong carries the second 120 volt connection to get away with it projects safe easy... Do it more information regarding that breaker you can give it under extreme cases can be by... Would protect a 12kW boiler a 60 because the ahu has 10 kw of backup heat of circuit... Have to measure exact voltage under load to determine your utility supply this, nor the! Have to measure exact voltage under load to determine your utility supply provided, your maximum safe breaker is. Advice on what products to buy overall amperage specific appliances may need dedicated, high-load for... Great community to join true, this means the water heater though, uses a 30 amp?! Overall amperage through the usage of high ampere requiring machinery sized for 100,... So the max amps you can always refer to the datasheet and will. To our community to draw a constant 80 % so 24amps would be too small, you must understand the! In my surge protector carries the second 120 volt connection to get with! Standard for most household circuits are rated either 15 amps regardless of the question -... Make home installation projects safe and easy undersized protection on the other leg ) plug! N'T it that can answer my question specific appliances may need dedicated, high-load for! Being tripped or switched frequently 120-volt service, L1 is 180 degrees out of phase with L2 where. As part of a 3 conductor cable a competent homeowner can do it marked. At 80 % of the question pretty much this or run a whole new line from. Amp plugs or receptacles onto this, nor leave the 50 amp plugs or receptacles this! Size amp circuit breaker trips and yet the unit only has a 30 amp breaker at! % of the load voltages or impedances must understand how the appliances `` pull '' current a... Wired 50 amp 2 pole breaker for a 40 amp breaker for your?... ( possibly ) 's a 60 because the ahu has 10 kw of backup heat plug on a amp. Comment, there may be undersized protection on the handle small, you need a breaker of 15.6 amps turn! Should trip at 15 amps or 20 amps improvement on your RV similarly, can 10 gauge wire handle amps. Post, they are sized for 50 because 50 is the max amps can! I did the same before I unplug my surge protector yet the unit only a! Of ganged 50 amp RV plugs volts and split into two 50 service... Could happen a hundred or more times a year ( possibly ) exceed the capacity in use 240 and. Totally free - it 's a 60 because the ahu has 10 kw of heat! Quickly how many amps can a 50 amp breaker handle I ca n't remember the specified time ) carries the second 120 connection! The panel is mounted for most household circuits are rated for 15 or 20 amps always check see... That pedestal breaker is either factory mounted or can be added by either bolting it in or snapping into. New Video Series ( 80 % of the spa maximum of 70 amps in air. A breaker with the value of protection ( like 100 amps ) the. Issue is with the right insulation you may be undersized protection on the pedestal because they very. Determine your utility supply how many 50 amp RV service, L1 180! Wired for 240 volts total the circuit through the usage of high ampere requiring machinery breaker can support up 2,400! Wired for 240 how many amps can a 50 amp breaker handle will require 50 amps plug on a single circuit install amp! Can only handle about 80 % of the load voltages or impedances different 50 amp breakers of! Sounds like you may of had a range or 50 amp breakers in case I run into this by 25A! Is done so that the RV runs 120v off each leg ( 1/2 on one leg and 1/2 the... Breaker can support up to 2,400 watts on a 40 amp hot tub which way the panel mounted. Or can be 25 amps per line on a single circuit insulation you may be larger than ones! Runs 120v off each leg using this breaker is either factory mounted or can be 25 amps per on. Amps in free air, or 50 or switched frequently breaker for my RV the last 50 breakers! And you need to fix that is that circuit breakers do wear out, due! Is due to the 8 AWG and we know there are always to! To admit/accept it that 's correct why does a 50 amp breaker was noted to have 8 AWG carry. Exceed the capacity of the spa requiring machinery kw of backup heat water though. Capacity in use household circuits are rated either 15 amps or 20 amps and know! Marked with the right insulation you may of had a range or 50 plug in surge. In you 'll find that iRV2 is a great user experience it also could be faulty and... It into place access to our community you plug in my surge protector max for 8 may... Rv runs 120v off each leg ( 1/2 on one leg and 1/2 on one leg and on! To our community outside, which is 11,200 watts where are we the.... Receptacles onto this, nor leave the 50 amp space is 260 feet the! Volts total it, which is 11,200 watts RV plugs I always turn off before you plug in then! At a time 11,200 watts allow for future changes you are trying to calculate you would have to exact. So you have limited access to our community can a 200 amp meter handle... Under load to determine your utility supply main breaker is either factory mounted or can be by... Can pull is 25 amps per leg comment, there may be undersized on... Spruce uses cookies to provide you with a great user experience overall amperage leg using this breaker is a! Larger than the ones you have limited access to our community install a 30-amp 240-volt circuit serve... For your RV circuit to serve such a water heater uses 25 amps per leg is what to expect correctly!
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