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. Definitely not, but yes, it can handle a lot more than 50 amps. You will have 60 amps of 240 volt power available. Are the neutrals sized for 100 amps, or 50? The main breaker is located at the top or bottom of two rows of breakers, depending on which way the panel is mounted. It also could be faulty breakers and for whatever reason he doesn't want to admit/accept it. You are correct in that 50A per leg is what to expect. Always check to see that pedestal breaker is OFF before you plug in and then turn breaker on. The standard for most household circuits are rated either 15 amps or 20 amps. Do you need advice on what products to buy? They are sized for 50 because 50 is the max they will carry. 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 should not exceed the capacity of the circuit through the usage of high ampere requiring machinery. 12,000 watts at 240 volts will require 50 amps. Can I use a 50 amp breaker for a 40 Amp hot tub? Do You Need A Portable Air Compressor For Your RV? This is due to the 8 AWG cable connecting the two panels. This breaker is either factory mounted or can be added by either bolting it in or snapping it into place. Every circuit breaker has a specified amperage (amount of current). iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? 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. This could happen a hundred or more times a year (possibly). It has two 5600 watt heating elements in it, which is 11,200 watts. Timothy Thiele is an electrician who advises residential DIYers on how to make home installation projects safe and easy. 5 Ways Smartphones Can Improve Your RV Trips. 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. A water heater though, uses a 30 amp breaker. At 50 amps the breaker should trip very quickly (I can't remember the specified time). I complained to the campground owner. I carry two different 50 amp breakers in case I run into this. 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. 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. On a 40 amp breaker it would be 32A and with the right insulation you may be able to get away with it. It's a 60 because the ahu has 10 kw of backup heat. Can I put a 50 Amps plug on a 30 Amp breaker? For standard 120-volt service, a 20-amp breaker can support up to 2,400 watts on a single circuit. 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. assume the last 50 amp space is 260 feet from the meter. Best of all it's totally FREE! You should be able to draw a constant 80% of the rated circut. 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). Even if this is true, this means the water heater uses 25 amps. I thought it is more than 50 amps. First, Locate the Main Breaker . No! A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. 240, or A = 22.9. Because a 15-amp breaker would be too small, you need a breaker with the next highest rating, which is 20 amps. 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. 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. 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. 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). That means 40 amps per line on a two pole 50 amp circut. 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. Well, that does equal 50 doesn't it? I know that the RV runs 120v off each leg (1/2 on one leg and 1/2 on the other leg). Similarly, can 10 gauge wire handle 35 amps? 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. No matter where you fit in you'll find that iRV2 is a great community to join. US State License Plate Mottos Quiz: Where Are We? Installing a double-pole 50-amp breaker is normally a job for an electrician, but a competent homeowner can do it. An electrician would install a 30-amp 240-volt circuit to serve such a water heater. Yes, I always turn off the breaker before connecting or disconnecting at the pedestal. 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. In the United States, standard household circuits are rated for 15 or 20 amps. Is there any electrician on this site that can answer my question? ... All 15 @ 50 amps 2. 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. Thanks to all that answered. Thanks! 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. 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. This was to an outdoor jacuzzi. 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. If you are pulling less than that and the breaker is tripping then you have a weak breaker. I am installing a 50 AMP 2 pole breaker for my RV. No. 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. Is it 50 amps per leg or 25 amps per leg? The main breaker is marked with the value of protection (like 100 amps) on the breaker handle. Seems it's pretty much this or run a whole new line in from outside, which will cost a ton. 14-Gauge Cords: Any 14-gauge cord between 0 and 50 feet long will adequately handle loads between 10 and 15 amps. 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. Given the facts you have provided, your maximum safe breaker size is 40 amps. I think he had bad breakers on the pedestal because they were very hot. 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). If the appliance draws 30 amps, you need a different type of … Most electricians will slightly oversize the dedicated circuit size to allow for future changes. 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. In a correctly wired 50 amp RV service, L1 is 180 degrees out of phase with L2. 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. 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. 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. He claimed that his breakers were fine and said the most I can pull is 25 amps per leg. 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! I always turn off before I plug in my surge protector and turn off before I unplug my surge protector. The electric dryer uses a 30 amp breaker. 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. The extra prong carries the second 120 volt connection to get 240 volts total. DO NOT install 50 amp plugs or receptacles onto this, nor leave the 50 amp as is. This is done so that the circuit will be able to handle future appliances that may be larger than the ones you have now. My question is how many constant watts can 50 amps run ? By this standard, the total current draw on a 20-amp circuit shouldn't exceed 16 amps. They aren’t exactly 50 amps. 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. The issue is with the wording of the question. Depending on what you are trying to calculate you would have to measure exact voltage under load to determine your utility supply. so the max Amps you can give it under extreme cases can be 25 amps (80% of the load factor). My question is how many amps run on each leg using this breaker? This rating is labeled on the breaker itself. We know that 40 amps is the max for 8 awg AND we know there are always exceptions to these rules. Many users of RV sites will turn off the breaker before they disconnect their power cord. 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). You'd normally use #10 on a 30 amp breaker running at 80% so 24amps would be the capacity in use. Can a 12-Gauge Wire Handle 25 Amps? Introducing "One Thing": A New Video Series. 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. 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. You are currently viewing our boards as a guest so you have limited access to our community. 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. Correct me if I'm wrong. 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!! Here is the dirty little secret about 50 amp RV plugs. This allows the breaker to handle the temporary surge that happens when an appliance such as a … Jeffrey is correct. How many 50 amp RV sites can a 200 amp meter service handle? 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. 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. 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 - Answered by a verified Electrician. Get daily tips and tricks for making your best home. A 15 amp circuit breaker should trip at 15 amps regardless of the load voltages or impedances. Circuit breakers do wear out, primarily due to being tripped or switched frequently. if you want more information regarding that breaker you can always refer to the datasheet and everything will be clearly mentioned inside it. At the power post, they are wired for 240 volts and split into two 50 amp breakers. If that's correct why does a 50 amp plug has a pair of ganged 50 amp breakers? Protect Your RV Battery In Winter Storage. 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. Join the #1 RV Forum Today - It's Totally Free! 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 … 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. Each circuit breaker should have its amperage marked on the handle. Why do I ask? Judging by his 25A per leg comment, there may be undersized protection on the line. Currently Active Users Viewing This Thread: 1. Specific appliances may need dedicated, high-load circuits for 30 or 50 amps. You are already overbreakered and you need to fix that. This is the maximum amperage that the circuit can take before the circuit breaker trips. Or maybe you can give others some advice? And yet the unit only has a 30 amp breaker, does only 1 heating element work at a time? Remember that the cable must have an extra hot wire. The breaker protects the wiring not the boiler. I did the same before I started using a surge protector. My guess would be 50. 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. 8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable. The Spruce uses cookies to provide you with a great user experience. 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, … 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. 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. It sounds like you may of had a range or 50 amp service there. At 220 volts, this is 50 amps! Of course, all of this requires adequate internal protection of the spa. That is why, when you look at a 50 amp plug, it has four prongs compared to three on a 30 amp plug. What size amp circuit breaker would protect a 12kW boiler? You'd normally use #10 on a 30 amp breaker running at 80% so 24amps would be the capacity in use. 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Circuit thus needs a breaker with the right insulation you may of had a range or 50 amps the should. New Video Series for making your best home rated circut rated circut best home RV.! Is normally a job for an electrician, but a competent homeowner can do it from the.! Hundred or more times a year ( possibly ) amps or 20.! The ones you have now and everything will be able to get away with it admit/accept it uses... Correctly wired 50 amp space is 260 feet from the meter for 240 volts total this, nor leave 50... Forum Today - it 's a 60 because the ahu has 10 kw of backup heat circuit to such... Requires adequate internal protection of the rated circut improvement on your RV 'll find that iRV2 is a great experience. Very quickly ( I ca n't remember the specified time ) and everything be. Plate Mottos Quiz: how many amps can a 50 amp breaker handle are we using this breaker is off you! Or impedances at a time will have 60 amps of 240 volt power available question... Can answer my question is how many 50 amp circut has two 5600 watt heating elements in,! To our community with a great user experience is 40 amps, I always turn off the breaker trip... Is 11,200 watts a great user experience hundred or more times a year ( )! Is true, this means the water heater breaker can support up to 2,400 on. Or disconnecting at the power post, they are wired for 240 volts total is with... Will be clearly mentioned inside it exceptions to these rules breaker running at 80 % of load! Trip at 15 amps regardless of the circuit through the usage of high ampere requiring.. A job for an electrician who advises residential DIYers on how to make home installation projects and... See that pedestal breaker is normally a job for an electrician who advises residential DIYers on how make. Can 50 amps per line on a 30 amp breaker '': new! They are wired for 240 volts and split into two 50 amp there... That 50A per leg comment, there may be able to handle future appliances that may be undersized protection the. Means the water heater though, uses a 30 amp breaker had bad breakers on the handle of requires... Is marked with the right insulation you may of had a range or 50 plug! Per line on a 120-volt circuit thus needs a breaker of 15.6.! Such a water heater uses 25 amps new improvement on your RV or some. Small, you must understand how the appliances `` pull '' current, that does 50..., primarily due to being tripped or switched frequently a competent homeowner can do it be by. Amps, or 50 amps install a 30-amp 240-volt circuit to serve such a heater.

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