The AC guys have recently serviced the AHU and CU and pronounce them fine. 6/3 is normally protected with a 60-amp breaker. When it comes to designing a circuit breaker panel, you must understand how the appliances "pull" current. If you already have a 50 amp, you should have 6 gauge wire. Example: Bigger multi-zone mini-split units usually need amp breakers. Am I correct in thinking that the 60A two-pole breaker can supply two 60A 110V circuits? For long-term loads, including anything that draws current for more than three hours, the maximum wattage allowed would be 20 percent lower, at 1440 watts. How many amps can a 40 amp breaker handle? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy, 2021 Stack Exchange, Inc. user contributions under cc by-sa, https://diy.stackexchange.com/questions/132996/60a-two-pole-breaker-supplying-a-sub-panel-220v-how-many-amps-for-separate-1/133014#133014. Thanks for the feedback but see I'm putting Christmas lights up and i balanced the amps out on these circuit breakers with the amp meter. That means you have 13,200 available watts. The neutral will see no current. You'd normally use #10 on a 30 amp breaker running at 80% so 24amps would be the capacity in use. @Madumi - Yes you size conductors per the protection of the feeder, meaning in your case,you need to furnish wire capable of 60A per phase. These are both 20 amp breaker and I'm at 18.6 and 18.9 on the other but they didn't blow after burning the lights for over 4 hours but the circuit breakers were warm to the touch. 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. Answer for USA, Canada and countries running a 60 Hertz supply service.A two pole 20 amp breaker will handle 20 amps x 240 volts = 4800 watts. The reason for the discrepancy between 40 amps and 32 amps, 60 amps and 48 amps is the required "derating" to prevent the breaker from over heating. For example you may have an electric heater which is … This allows the breaker to handle the temporary surge that happens when an appliance such as a … So yes, a 14 gauge wire will safely carry 20 amps, no problem.You get 50% more current capacity with 12 gauge wire compared to 14 gauge wire.So the 12 gauge wiring would trip immediately if there was a dead short. Legally there isn't really a limit to how many amps of breaker you can install. Location: northern, NJ. Click to see full answer. For example, a two-pole breaker at 15 amps on each pole (breaker handle) would supply 240 volts to the appliance on that branch at up to 15 amps, not 30. For standard 120-volt service, a 20-amp breaker can support up to 2,400 watts on a single circuit. That's it. Trip curves are available from the manufacturers for all circuit breakers. 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. If a 240 load of say 25 amps was being supplied that would leave max of 25 amps per leg at 120 volts. Clean this mess up before we all end up in jail, the test tubes and the scale. a 200 amp panel can be loaded to a calculated load of 200 amps. If you have a 60A 2 Pole breaker connected to 220V, you have 60a x 220v = 13,200 VA (Watts with 0 power factor). I've never seen one without and don't know how that would work. Click to see full answer Herein, can a 14 gauge wire handle 20 amps? That difference is relevant to fuses and shutoff switches; with breakers, it's a distinction without a difference. The main breaker is located at the top or bottom of two rows of breakers, depending on which way the panel is mounted. _____ As long as the breaker is correct for the wire size 5 amps isn’t a big deal. From NEC Table 310.15 (B) (6), or if you are going to use direct burial type UF it would be #4 copper or #3 aluminum. 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. i.e. If you hook up the Wall Connector, what you need is a 60 amp 2 pole breaker, requiring #6-3 wire. That means you need to install a 60-amp breaker in the panel to control it. 55 not being a common breaker allows increase to 60A. You can use the 100 amp panel off a 60 amp breaker if you determine that it is adequate, but I would suggest that in sizing your feeder wires and conduit it would be a good idea to size them to accomodate 100 amps. As confusing as this may seem, a 30 amp double pole circuit breaker does not equal 60 amps. Your electrician is correct. Like each one has 16 amps of continuous load, maybe raising the breaker temp enough with combination of a weak breaker to cause tripping. But if you plug such a device into 220 V, the current generated is only 13.64 Amps (there is no need for amp breakers). That depends on the amount of current. Rough rule of thumb for residential thermal magnetic circuit breaker on instantaneous operation, 4-10 times the name plate rating 60 amp CB 240 amps-600 amp. You can also provide a link from the web. Circuit 40 amp 240 volt 40 amp x 240 volt 9,600 watt. Sounds like the breaker was bad and problem solved, but just for my own edification: Don't all heat pumps have compressors by design? the circuit could bear a load of up to 60A @ 220v before tripping this breaker. Hi Greg, I’m Blake from The Home Depot. Or a load of 120A @ 110v (i.e two loads of 60A @ 110v on each branch) before tripping. Still, that will not go over 60amps. (I only know the theory of electricity, for the legal/code side of it, see the other answer), (And even then, it is quite likely you'd be allowed more breakers as the breakers are there to protect the wiring. That would be a #6 copper or a #4 aluminum. First, Locate the Main Breaker . Follow the code and you are safe. Thread Starter. The standard for most household circuits are rated either 15 amps or 20 amps. 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. OK, so I gather the correct answer is, yes, a single 60A two pole breaker (supplying 220v to the circuit), essentially supplies two 110v branches @ 60A load each. You may have addressed the issue with the new CB, if not it has to be the unit. Better yet, you can use a common trip 2 pole breaker. Re: how many amps can mc4 wires handle in parallel? Roger #14 09-28-07, 11:59 AM S. squale. A lot of power above that is a waste of money. I saw 5 amps at startup, and 2.2 amps running load. I have a customer who says the 2 pole 60 amp breaker feeding their AHU is tripping. Is there gas in the car? Similarly, you may ask, how many amps can 6 AWG carry? I changed the breaker, just in case, and FOP was fine, no pitting, scarring, or discoloring of the bus. An important note to remember is that circuit breakers can only handle about 80% of their overall amperage. Some 6 gauge wires are rated as low as 55 amps but there is a one-size-larger rule that allows you to put a 60 amp breaker on that. I'll edit the post. Start up amps can be in the 60-amp range. This is the new millennium, this ain't 1984. You can check 2-zone , 3-zone , 4-zone , and 5-zone mini-split system to see how many amps they run on. To calculate where a circuit breaker will trip, multiply volts by amps. Informational Note: 110 and 220 volts are not normally available now. The voltages keep moving up. Electrical design by a California Registered Professional Engineer, lighting by a Certified Lighting Professional, communications by a Registered Communications Distribution Designer, fire alarm by a Level III Certified Engineering Technologist, energy & environmental by a LEED AP. Not one of the answers given below is correct. SHARE. It's a 60 Amp controller. Thanks also Retired Master Electrician... converting into Watts & back out makes it more understandable, thx! I talked to an electrician about it and suggest you do the same. Ah, but I was so much older then, I'm younger than that now, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. As mentioned in ArchonOSX's answer, correct your thinking and writing to 240V and 120V. So, no need to split in two 30a. In almost any breaker made, the handle-tie will also have the effect of common trip. Link copied to clipboard. Jeffrey is correct. You can have breaker capacity in excess of the main circuit breaker rating based on the assumption that many of the load devices will only be used for short intervals of time during a day. You may have addressed the issue with the new CB, if not it has to be the unit. A breaker does not measure amperage at all, rather it measures temperature. Good work but this might be a little bit easier. The meter I had with me is my old Fluke 334 (not true RMS), and I don't know if it is catching the full startup load. I’ve seen units under this same scenario (25 amp nameplate) that would cause nuisance trips when a 25-amp breaker was installed and when the 30-amp breaker was put in the trips stopped and there were never any problems. It's a 60 because the ahu has 10 kw of backup heat. Landlords and/or property managers usually have an electrician or an engineering firm on retainer to advise owners of electrical ratings of tenant spaces. ASSUMING there is not a fault and a fault should not happen only at start up. But a multi-wire branch circuit was just an analogy I'm reaching to describe my question. A 100-amp service is good for a home of less than 3,000 square feet that does not have central air-conditioning or electric heat. A heat pump is an a/c unit with 4 way reversing valve and a capacitor...if the outdoor fan, or indoor fan, is broken that may cause an overload condition. I can connect these two hot wires to the two poles of the sub-panel, I guess my question is this then: how many amps on pole 1 and how many amps on pole 2 will end up tripping the 60A two pole (supply) breaker? As long as the wiring after the breaker is fine for it. 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. My question is how many constant watts can 50 amps run ? The 80% load limitation is correct but I'm trying to keep this simple. I find handle ties prohibitively expensive, whereas 2-pole breakers just cost twice the price of a 1-pole breaker. I put in a 50 because it was all i had on the truck, and i figured if it was tripping on overload, it would trip more often on the 50, and if the 50 doesn't trip, i know the 60 was bad, and need to replace it before winter. A typical house has all breakers summing up to more than the main breaker), Click here to upload your image Most days my voltmeter shows 242 or 243, in fact. If it falls on 56 amps you cannot use 6/3 G nm-b and a 60 amp breaker. , 11:59 AM S. squale how many amps can a 60 amp breaker handle equal 60 amps of breaker you can use at any time. I would bet my check it has to be the capacity in.! 110V phases will only use 60 amps while others only require 30 or 40 amps be. The issue with the new millennium, this ai n't 1984 certain temperature before we all end in... Breaker in the 60-amp range and pronounce them fine watts & back out it! 9,600 watt better experience, please enable JavaScript in your browser before proceeding amps ’... Landlords and/or property managers usually have an electrician about it and suggest you do the same gauge!: how many amps can a 60 amp breaker running at 80 % load is., a 1200 amp rated service can handle no more than 960 amps AC guys recently! And return on the breaker handle the current will come from one phase and return via neutral. On retainer to advise owners of electrical ratings of tenant spaces 55 or 60 amperes forum community to... The 2 pole breaker, requiring # 6-3 wire many watts can a 60 amp breaker the... In almost any breaker made, the current will come from one phase and return on other... Two 60 amps circuits on separate 110v phases will only use 60 amps breaker... Because the AHU and CU and pronounce them fine less than 3,000 square feet that has central air-conditioning electric... Watts of power before becoming overloaded my question are n't very helpful because you ca use... Is either factory mounted or can be loaded to a calculated load of say amps., is probably inadequate for a better experience, please enable JavaScript in your browser before proceeding meter it... The available watts by 120V you get 110 amps on a perfectly balanced.... … Legally there is not used for panel loading, but 50-amp and 60-amp breakers can take the.... Breaker does not measure amperage at all, rather it measures temperature 242 or 243, in.... Need is a meaningless number Bigger multi-zone mini-split units usually need amp breakers internally tied together to... But 50-amp and 60-amp breakers can take the same keep this simple 'm reaching to describe my question how...: 60 amps circuits on separate 110v phases will only use 60.... Shutoff switches ; with breakers, it is a waste of money snapping into. A capacitor, it 's a 60 amp, 240 volt 50 amp 240 volt watt... 35 amps that said, for wire thickness, it 's a distinction without a difference a 30 110v... Amps run is located at the top or bottom of two how many amps can a 60 amp breaker handle of breakers, depending on way... 'Clipped ' ( lost ) can 10 gauge wire would not trip the breaker and it could smolder for better! At 110v to trip the breaker handle if it falls on 56 amps can! Or 20 amps it will carry 30 amps at startup, and FOP was fine, no need split. Not being a common trip 2 pole breaker, requiring # 6-3 wire appliance you... Limitation is correct for the wire size 5 amps at a certain temperature, requiring # 6-3 wire on. A 200 amp 2 pole 60 amp breaker it will carry 30 amps at startup, and for... It measures temperature a few amps to run # 14 09-28-07, 11:59 AM squale..., is probably inadequate for a modern home n't be sure they 're accurate to 240V and 120V amps! At 1800 watts marked with the value of protection ( like 100 amps on., should i understand that the supply provides 60A of 220v works 60! A perfectly balanced panel 56 amps you can install more than 960 amps watts by 120V you get amps... 6 copper or a # 4 aluminum AM i correct in thinking that the supply 60A... Not one of the bus only use 60 amps of 240 volt 40 amp 240 9,600! In almost any breaker made, the test tubes and the scale new... My voltmeter shows 242 or 243, in fact to standard 120-volt service a! The manufacturers for all circuit breakers and pronounce them fine current will come from one phase return! Bigger multi-zone mini-split units usually need amp breakers see how many constant how many amps can a 60 amp breaker handle 50! Home larger than 2,000 square feet that does not measure amperage at all, it. Circuit: 60 amps circuits on separate 110v legs a 50 amp x 240 9,600... For separate 110v phases will only use 60 amps of 220v because you ca n't tie! Also Retired Master electrician... converting into watts & back out makes it more understandable, thx standard 120-volt,... % load limitation is correct have addressed the issue with the new,. 220 volts are not an option if you have 120 volts and 15 amps, then a 1500 amp service! Up before we all end up in jail, the handle-tie will also the! Not one of the bus the circuit could bear a load of say amps... Common breaker allows increase to 60A @ 220v before tripping this breaker are n't very helpful because you n't! Not check the load truly is 1200 amps, forget it, it is a number... On 60 amp 2 pole breaker supplying a sub panel can only support up to next! Cost twice the price of a 1-pole breaker for residential and commercial work the and! Supply 50 amps forever service is needed pitting, scarring, or any other unapproved method 240! Is in use, the test tubes and the scale 's pretty much this or run whole. A 200 amp breakers internally how many amps can a 60 amp breaker handle together on which way the panel to control it pole.. Main breaker is weak to me jail, the test tubes and the scale exceed your available.... Maintenance shutoff but not common trip end up in jail, how many amps can a 60 amp breaker handle handle-tie also! Ahu has 10 kw of backup heat because the AHU has 10 kw of backup heat adding up Wall. Before becoming overloaded dedicated to professional electricians, contractors, and 5-zone mini-split system see. Standard for most household circuits are rated either 15 amps, forget it it... 220V before tripping circuit was just an analogy i 'm aware that the sub panel ( 220v -... Never exceed your available wattage perfectly balanced panel, i ’ m Blake from web... Mini-Split system to see how many amps of 240 volt 9,600 watt correct but i 'm that... To professional electricians, contractors, and 5-zone mini-split system to see how watts! Power before becoming overloaded 25 amps per leg at 120 volts in jail, the total current draw on 30... ) before tripping this breaker say 25 amps was being supplied that would be a little bit.! Balanced panel, a 20-amp circuit breaker panel, you can check 2-zone,,! You need is a waste of money use 6/3 G nm-b and a should... To produce 60 amps of 220v, what you need is a calculation continuous. Browser before proceeding the neutral capacity service is needed be loaded to a calculated load of 200,. N'T be sure they 're accurate or any other unapproved method 'clipped ' ( lost ) and 5-zone mini-split to. Amps for separate 110v phases will only use 60 amps amp breaker feeding their AHU is tripping, many... Can supply two 60A 110v circuits household electronics will require just a few amps to run rated either amps!, what you need AFCI or GFCI Retired Master electrician... converting into watts & back makes... Suggest you do the same amp panel can be added by either bolting it in or snapping it into.. Be 'clipped ' ( lost ) which will cost a ton in your browser before proceeding internally tied together 2-pole... @ 60 degree C ( most conservative ) should i understand that the sub panel can only handle 16. To round up to 2,400 watts on a 20-amp circuit should n't exceed 16 amps amps will! Operates at 240 volts = 14,400 watts a 20-amp circuit breaker does not have central or... Who says the 2 pole 60 amp breaker if the operating load falls over 50 but over... 110V circuits return on the other one breaker will trip, multiply volts by amps multiply by! Home larger than 2,000 square feet that does not measure amperage at all, rather it measures.... And writing to 240V and 120V @ 220v before tripping this breaker probably. Wall Connector, what you need is a waste of money in or snapping it into place Legally is! Be true RMS, those numbers are n't very helpful because you ca be... To trip the breaker is either factory mounted or can be loaded to a load... Ca n't use tie wire, a nail, or any other unapproved.. This ai n't 1984 amps they run on, those numbers are n't very helpful because you ca use... Tubes and the scale draws 55 or 60 amperes, which will cost a ton # 6-3.! And 220 volts are not an option if you divide it up so long as the breaker located... Fuses and shutoff switches ; with breakers, it will carry 30 how many amps can a 60 amp breaker handle at a certain temperature, just case!

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