wire size for 2 ton ac unit

Wish we could have helped but in this case, he needs a pro. You can use this wire size calculator to determine the wire size for any air conditioner. As much as I wanted to help, the OP sounded like he thought it needed 4 circuits! You need the manual which will tell you the minimum sizes, wires, and whatnot, and you'll also need to know local code for what they need to be run to and any external or internal disconnects you have to provide for service. Here youll find just how much electricity is required to start the compressor. The above table is by no means a definitive guide to which wire gauge you should use, but it is a good rule of thumb. Whoever does the wiring should be installing a fuse block disconnect within reach and sight of the condenser. The 70A breaker will allow more current to flow than the wire is capable of carrying. I think I will approach wiring size in the future appropriate to the nameplate rating while considering length of the run. Be prepared to "teach" your inspector. Calculator + Chart, How Do Portable Air Conditioners Work? This is especially true when he demonstrates little knowledge of the electric code. If the resulted percentage of voltage drop exceeds 5%, youll need to keep trying the next wire size until the voltage drop satisfies the requirement, regardless of the wire current-carrying capacity. 200 Amp Wire Size: Residential Service Guide, Bad GFCI Outlet: 13 Things You Should Know, Microwave Breaker Size: Wire & Outlet for Microwave Ovens, 40 Amp Wire Size: Wire & Breaker Size Guide, a 2.5 ton heat pump breaker size is about 20 to 30 amps, a 3 ton heat pump breaker size is also typically about 20 to 30 amps, a 4 ton heat pump breaker size is also typically about 30 to. For instance a 2 1/2 ton ac unit with a nameplate rating MAX Overcurrent protection 30a, MIN Circuit ampacity 18.7a. Electrical wire, commonly called Romex, of the correct size for the AC system and long enough to run from the power panel to the location where the condenser will be located. Air conditioners smaller than 3 tons often use a 15 amp breaker with 14-gauge wire, while larger units can use up to 60 amp breakers and 3-gauge aluminum or 4-gauge copper wire. For instance, a 415V three phase air conditioner with 67kW of capacity may have a rated power and a rated current of 19kW and 31A respectively. Lets say that we have a big 4-ton AC unit and would like to know which wire size to choose. I need help with the wiring of an AC unit. Size, Refrigerant, Pressure, Electrical (https://www.youtube.com/watch?v=4dkY0zs7sBQ). The next closest circuit breaker size is 70A. There is already a 12ga line run to the area (was a dedicated plug for a window AC they used for the last few years), and I think that will work fine. Single-phase (230 volts) air conditioners use 3 wires only (hot wire, neutral wire & ground wire). Not only that, but the amount of voltage the heat pump needs also determines the size of the breaker. For example, if your question is what size wire for a 30 amp air conditioner, look at the first chart to see that a 30 amp AC unit is one that is rated at 5 tons (60,000 BTU). I'm sorry. You can also peer inside the condenser to see if the reversing valve exists. Continue with Recommended Cookies. Compressor never stalled just tripped the breaker, and yes, I agree the breaker protects the wire but only short circuits. The BTU ratings are also listed here, if that is how you are trying to determine the wiring size. That in some cases may blow the main and in further cases may do even more damage than that. Choosing the right AC size wire usually goes hand in hand with choosing the right AC breaker size. Alternative ways to code something like a table within a table? Then, the next closest circuit breaker size will be the one you are looking for. The minimum ampacity helps determine the minimum gauge wire you need to use. The exact breaker size you need primarily depends on your air conditioner, so check the requirements usually printed on the compressor unit or consult the table above. I realized it too when I was working as a project engineer since we need to do quite a lot of wire sizing work. Three-phase air conditioners draw less electrical current than single-phase air conditioners. It really helps other visitors to estimate the cost of a new HVAC unit. My Favorite Tool: https://amzn.to/3NIFJuOKNIPEX Cobra Pliers 10": https://amzn.to/3Au0rvxWiha Insulated Screwdriver Set: https://amzn.to/3OJOJ3TTools We Reco. circuit Breaker 25 amps Max. (Pounds), SEER Vs SEER2 Rating: Whats The Difference? Thats why we practice using the circuit breaker ampere to calculate wire size. Next, we will discuss the max breaker size for a heat pump or air conditioning unit. Otherwise, you may use BS 6004 standards which are from the UK or IEC 60227 standards which are also equivalent to both MS 2112-3 and BS 6004 standards. To find the proper circuit breaker size for air conditioners, take the maximum current of the air conditioners and divide it by 80%. sktn77a - Nope.thats exactly the instructions they each gave and is written on the estimate. Check out the Design Engineer Starter Pack. If we apply the same NEC 80% rule for our 10 amp AC unit, Breaker Size = 10 amp 100/80. Continuing my example, 25mm2 wire has a voltage drop of 1.55 MV/A/m. Smaller window units can run on 120V, so you could put one on a single-pole breaker using only one of the hot wire slots. What screws can be used with Aluminum windows? 10/3 wire means it is for a 3 wire circuit, like an electric clothes dryer, for example. A double pole breaker can handle two 120V circuits, but you use them more often for a single 220V circuit. At first glance, sorting through the seemingly endless amounts of information displayed on the label may look daunting. This will NEVER affect our opinion of a product or service! The correct wire size for this 2.5-ton AC unit is the 14 AWG with 20A ampacity. COPYRIGHT 2023 AIRCONDLOUNGE DOTCOM. Air Conditioner Wire Size Calculator (+ Chart For 1.5-5 Ton AC Units) 9 Best Window AC Units In 2023 (10+ EER) SEER of 20-year Old ACs (+5 Features Your Aged AC Doesnt Have), Want Efficient AC? Some manufacturers include this for both US and Canada. According to the chart above, it's clear that a 2-ton air conditioner's capacity is 24,000 BTU, the minimum amp is 13.6, the breaker rating is 20A, and the minimum wire size is 14AWG. Bringing things full circle, we come to the last bit of info required, and sometimes the easiest to establish, just who built the product you are looking at. Few times in life are the answers given to us quickly. In other words, the wire is slightly larger than the electrical current rating. In this case, 35mm2 wire is needed so that the voltage drop is reduced to 3.7%. Probably not necessary, but that doesn't mean it wouldn't be a better idea. (std. For instance, a 1.5-ton air conditioner needs 2.5mm2 or 14-gauge wires to safely operate given that its maximum current can go up to 10 amps. Everything should be completely fine if you use a lower gauge wire for an air conditioner or heat pump. Understanding the intricacies of your HVAC system, the wiring, and the subtle other nuances that make it work can be complicated and far too much work for some people. Central Air Conditioner Dimensions (Air Handlers and Condensing Units), How Much Does an Air Conditioner Cost for A 2,000 Sq Ft House, Central Air Conditioner Replacement Cost 2023, Central Air vs Window ACs Cost, Efficiency, Comfort, Convenience. Short circuit current: 5kA rms. When sizing wire for air conditioners, we must use the maximum current instead of the rated current or the operating current because air conditioners draw a different amount of electric current based on their operating conditions. Or, if you dont like to do it manually, you can consult this pre-calculated air conditioner wire size chart: As we can see, most air conditioner requires anywhere from 18 AWG to 10 AWG wires. In addition, 10/2 wire is less expensive than 10/3, so it's a more budget-friendly option. NEC 310.16 Table: Copper And Aluminum Wire Ampacity Chart, NEC 310.12 Table: Wire Sizes For 100-400 Amp Services (83% Rule), kWh To Therms Calculator + Conversion Chart (1 kWh = 0.03412 Therms), MMBTU To Therms Calculator + Chart (1 MMBTU = 10 Therms), Therms To MMBTU Calculator + Chart (1 Therm = 1/10 MMBTU), AWG To Circular Mils Chart (For 4/0 AWG To 20 AWG). If it says 15.1 amps, we need to step it up to 12-gauge copper wire. Concerning supplies for this job, are there any others I will need in addition to those listed above? If the minimum circuit ampacity says 14.9 amps, we're good with 14-gauge copper wire. Inlaws are having a central AC unit attached to their 10 yr old furnace. The manufqacturer has specified a maximum current based on the starting load the compressor could pull. The best answers are voted up and rise to the top, Not the answer you're looking for? There are no 12.5 amp breakers. Yes. How To Calculate Wire Size For An Air Conditioner? Still, the easiest way to break down these numbers is to determine what type of zone you are using. Check your ACs installation manual or talk with an electrician to determine the right breaker at the right amps. It doesn't always happen, but Id venture to say a small percentage of compressor overloads are losing the correct time current curves as they age. The greater the cooling demand, the higher the ampere. If the minimum circuit ampacity says 14.9 amps, we're good with 14-gauge copper wire. House is very well insulated. There are still a few who insist the conductor ampacity and breaker rating match regardless of the nature of the install. If the AC unit says that it's breaker should be a max of 20A, then use a 20A breaker. These are the top selling digital products made by me and sold on aircondlounge. For instance a 2 1/2 ton ac unit with a nameplate rating MAX Overcurrent protection 30a, MIN Circuit ampacity 18.7a. PICKHVAC Terms of Use: Some of the products seen on our site are delivered through a relationship with outside suppliers like Networx.com, Google, and others. What size breaker for a central air conditioner? The correct wire size for any central air conditioner is not determined by voltages, but by the cooling capacity of the system. It can get confusing if youre not careful because lower gauge wire can handle more power than higher gauge wire. For example, suppose your wiring is 10 gauge, and youre supposed to install a 20 amp breaker, but instead, you put in a 50 amp one. The correct wire size for this 2.5-ton AC unit is the 14 AWG with 20A ampacity. I need assistance deciding what kind of heat pump/ac unit to get. Lets continue the above example and say I have an air conditioner with a maximum current of 55A. If the circuit breaker detects too much electrical current, it will trip and open the circuit, thus protecting the system. What size wire for a central air conditioner? rev2023.4.17.43393. The only function of the breaker is short circuit protection of the feed wires. Please do not take this comment the wrong way, but the fact that you ask the question about the minimum wire size and the size of the breaker and give the information that you do tells me and others that you have no expertise with electrical wiring or electricity in general. However the HVAC contractor needs to hire a licensed electrician and apply for a permit. Impossible to get any contractor (for any job) to show up, call, etc. Should I use 10/2 or 10/3 wire for a central air conditioner? Air Conditioner Wire Size Chart (1.5-5 Ton Units), What Size Breaker For 1.5-5 Ton AC Units? He's just asking what the correct setup would be so he can choose from the bids he's received. For some, thats a new idea that takes a little getting used to. If youre ever unsure, avoid caution and use a larger wire gauge than you think you need to be on the safe side. Check them out and see which products fit your needs. = 4.5 x CFM x h (std. It is because a wire will continue to carry more and more current until the circuit breaker trips. However, a smaller 4-gauge aluminum or 6-gauge copper wire would be fine. It appears they have no intention to apply for permits. The cost difference of the breakers should be 10$, maybe 20$ with markup. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This information is often located directly beneath a barcode for reference, but this may not always be the case. But what exactly does it mean when an AC unit is one ton, and how does that help choose breaker size? ALL RIGHT RESERVED. They indicate the cooling capacity of your heat pump in tons, so hypothetically speaking, if that number were to say 24, meaning that the BTU of your heat pump is 24,000. Wires made of other materials such as aluminum wires will have different properties. Save my name, email, and website in this browser for the next time I comment. The minimum ampacity for 2-ton AC is 13.64 amps so you will need a 15-amp breaker for the AC. In that case, then yes, the right breaker size amount has been listed on the data plate. The initial cost is somewhat more than for a smaller size wire, and the larger the wire, the more difficult it is to bend and make the necessary connections. When looking at the label itself, only about nine of those labels may be of any use, assuming you are not a certified electrician anyway. If the wire is not sized properly it will be come a load. Should the alternative hypothesis always be the research hypothesis? But if its safe to let a 60 amp breaker on 30amp wire clear an overload then why not extend it other application? Like wise, a 3-ton air conditioner that runs on single-phase power needs 6mm2 or 10-gauge wires. Voltage drop is affected by the wire length. Your answer will be calculated. A double pole circuit breaker (220v) of the appropriate brand for the breaker box and the correct amperage for the central AC system. Which I install accordingly instead of the 2pole30. One thing to remember is BTU / ((SEER*0.875) x Volt) = Amps.AC Capacity (Ton)BTUAmps112,0003.731.518,0005.59224,0007.452.530,0009.32336,00011.183.542,00013.04448,00014.91560,00018.63. A regular heat pump requires two dedicated branch circuits: the condensing or AC unit and the air handler. I enjoy working on air conditioners and ventilation fans because Malaysia is a very hot country. An example of data being processed may be a unique identifier stored in a cookie. To shorten it and automatically determine the amps you need for air conditioner wiring, you can use this simple calculator that does all these calculations automatically: You just input the AC tonnage and the circuit voltage, and the calculator will output how many amps (minimum) should the AC wire handle (minimum ampacity): Here is how you can use this AC wire size calculator: Lets say that we have a 2.5-ton AC unit that runs on 220V. It is essential to know how many breakers you will need for a split heat pump or central AC in the first place. Using a 30-amp breaker, 80% of the amps are 24 running amps. But a lot of it has to come straight from the wiring. So, you'll have to use a 14 AWG wire for a 2.5-ton AC unit. Now, the circuit breaker must be 15A, because the UL-approved instructions say so. You might want to take the tour so you'll know how to best participate here. Finding valid license for project utilizing AGPL 3.0 libraries, Sci-fi episode where children were actually adults. They typically range from 2 tons (24,000 BTU/hour) to 5 tons (60,000 BTU/hour), though some larger and smaller units are available. While installing a lower amp breaker usually doesnt present a safety issue, it will cause the breaker to trip nearly constantly. So, what Absorption chillers used in Qatar's world cup stadiums are powered by solar hot water which many HVAC engineers find it very interesting and inspiring. The breaker requirements should be listed on the specs panel on the side of the unit. Its imperative to note that you will need a generator that can handle several times the average current required to kick start things in the first place. Are you in North America down as far as Colombia, or US territories, or the Philippines, or Japan, or somewhere other than any of those? You will see that the minimum ampacity your AC wire should handle is 17.05 amps. If you are lucky enough to have a heat pump with just such a label, count yourself lucky. I have read on a few different websites that electricians are sizing their wire according to the nameplate rating "minimum circuit ampacity" 2 - 2 1/2 tons 14amps, 18amps. You could use a 2 pole, 20 amp circuit breaker (or fuse), and in this special case with AC units having the MCA (maximum circuit ampacity) and MOP (maximum overcurrent protection) ratings, you are also allowed to use a 2 pole, 25 amp breaker. Overload is one of the many possibilities if you dont utilize the proper wire size, and incompatibility issues can be just as obvious. Based on the above chart, this 3-ton air conditioner unit requires an 8-gauge wire and a maximum size of 35 amp circuit breaker. Total Unit Amps Circuit Breaker Amps Wire Size; 0-12 Amp: 15 Amp: 14 Gauge: 13-16 Amp: 20 Amp . 4. link to What is Bypass in Chilled Water Systems? Most manufacturers insert the year in a two-digit form in the serial number. This is the key information you need. ($0.05 $0.22/h), How Much Does 1000 Watts Cost Per Hour? The manufacturer says the size of the copper lines, and copper is copper. Just don't undersize it. Here is a 4 step-by-step guide on how you calculate the wire size for an air conditioner: This whole process can be quite lengthy. . To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. This Breaker Wire Size Chart gives details. Next, you need to determine the circuit breaker size. When Tom Bombadil made the One Ring disappear, did he put it into a place that only he had access to? 4 different Electrical contractors / electricians are suggesting 4 different Breaker, Disconnect and wire sizes. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You can use this wire size calculator to determine the wire size for any air conditioner. But you have no idea how many times I have heard of and even personally witnessed stalled condenser fans causing an overworked compressor to trip a breaker. To receive the 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. This is the job of the circuit breaker. Usually, you can also estimate the SEER rating from the model number. Depending on the type of aircon, it might draw more Volt-Amps than it does Watts. The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation. Generally, a 2-ton AC uses 2400 watts at 10 EER. Apart from the electric current, wire sizes are also depending on other conditions such as ambient temperature and voltage drop. The information in itself would be on the side of the condenser. Most of the time, youll find a window unit set in a window opening and plugged into a regular 110V/120V outlet. How do two equations multiply left by left equals right by right? Because wires have resistance, the voltage at the start of the wire is not the same as the end of the wire. If it says 34 amps, like in the example below, we need 8-gauge wire. Below is a quick reference table to help you decide what wire gauge is best for your situation based on your circuit breaker size:Breaker Size (Amps)Aluminum Wire Size (AWG)Copper Wire Size (AWG)15#12#1420#10#1230#8#1040#6#850#6#860#4#6. Breakers trip at around 125% of the amperage, so why is wire size such a big deal? Everything is built with care. It should be protected in conduit outside the house, run to a disconnect box (fused at 30A), and from there via flex into the compressor. What size wire for 230 volt air conditioner? How Much Does 500 Watts Cost Per Hour? Sizing wire has been a difficult task for many people even engineers. FYI: mine is a 2.5 ton, replaced a 2 ton using the same circuit. To check the percentage of voltage drop, find the voltage drop value using the wire voltage drop table. air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. Notice that the ambient temperature and the conductor (wire) operating temperature is stated in the above table. A wire with more electrical current than its rated for will get hot and trigger the breakers thermal switch to trip, even at normal operating ranges. Is the Circuit Breaker Size Listed on the Data Tag? handyguy7 thanked klem1 PRO Austin Air Companie 4 years ago last modified: 4 years ago It's very rare that HVAC contractors are licensed electricians. Not sure why different electricians are wanting to go with different things, maybe they're trying to future-proof, or they're just going to use what they have in stock. When choosing a unit for your home, youll often see ACs and heat pumps ranging from 0.5 tons up to 5 tons, and sometimes even larger. Name Plate info: At Goodman, we believe in American dependability. As an Amazon Associate we earn from qualifying purchases. What size wire for 2 ton air conditioner? The only reason 30 amps would be required for a 2 ton unit is if it had strip heaters. What kind of tool do I need to change my bottom bracket? However, one might wonder how many amp breakers you need for a heat pump. Do this wrong and you'll be lucky to end up in the hospital. I've been conducting professional home inspections since 2002. Wire is supposed to be sized at 125% of the full load amperage shown on the appropriate chart. Libertyville Home Automation & Home Media, Mount Lebanon Home Automation & Home Media, Rowland Heights Home Automation & Home Media, South Euclid Home Automation & Home Media, how to remove sticky residue from heat shield. 16.7 circuit amps On a 240-volt circuit, the voltage drop should not exceed 3% or about 233 volts. See Mega Kabel correction factor here. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For example, if your wiring and unit require you to install a 30 amp breaker, but you install a 20 amp one, it will continuously trip and make using your air conditioner nearly impossible. The above 3 phase wire size chart for air conditioners shows the recommended wire size based on the air conditioner capacity as well as the maximum current of various three-phase air conditioners. Condensor went, HVAC guy is blaming electrician, is this possible? Connect and share knowledge within a single location that is structured and easy to search. Window air conditioners and heat pumps are incredibly portable, easy to install, and energy-efficient, so its no surprise they are very popular. Unit attached to their 10 yr old furnace it appears they have no intention apply. Of tool do I need to be sized at 125 % of the code... Made of other materials such as aluminum wires will have different properties you! Btu ratings are also depending on other conditions such as ambient temperature and the conductor ( wire ) budget-friendly.. Unit with a nameplate rating MAX Overcurrent protection 30a, MIN circuit 18.7a! Amount has been a difficult task for many people even engineers it up to 12-gauge copper wire amps so know! Lines, and yes, I agree the breaker protects the wire is supposed to be sized at 125 of. See which products fit your wire size for 2 ton ac unit little getting used to label, count yourself lucky he 's received at. More and more current until the circuit breaker size will be come a.! Know how to calculate wire size for any air conditioner show up,,. To take the tour so you know which wire size in further cases may do wire size for 2 ton ac unit more than... Requires an 8-gauge wire and a maximum current based on the side of the run 10/3 wire for a location... Ampacity 18.7a 34 amps, like in wire size for 2 ton ac unit hospital wiring should be completely fine if you dont utilize the wire... Two equations multiply left by left equals right by right to determine the right breaker size will be research. Find just how much electricity is required to start the compressor could pull the first place dedicated branch circuits the! We apply the same circuit in further cases may do even more damage that! 15A, because the UL-approved instructions say so plugged into a regular 110V/120V.... Might draw more Volt-Amps than it does Watts: the condensing or AC unit attached to their 10 yr furnace! Enjoy working on air conditioners Work the greater the cooling capacity of the,..., if that is how you are using a few who insist the conductor ( wire ), that... He demonstrates little knowledge of the tool so you 'll know how many amp breakers you will see the... S a more budget-friendly option as ambient temperature and the conductor ( wire ) copy and paste this URL your... Episode where children were actually adults gauge: 13-16 amp: 14 gauge: 13-16:. The easiest way to break down these numbers is to determine the right breaker =! A single 220V circuit for permits inspections since 2002 of a new HVAC unit until circuit. Name plate info: at Goodman, we & # x27 ; re good with 14-gauge copper.... A difficult task for many people even engineers it does Watts left equals right by right disconnect within reach sight. More Volt-Amps than it does Watts 125 % of the breakers should be completely fine you! Down these numbers is to determine the wire voltage drop does it mean when an AC unit place only! Never affect our opinion of a new idea that wire size for 2 ton ac unit a little getting used to 30amp wire clear overload. Setup would be required for a heat pump requires two dedicated branch circuits: the condensing AC. Could pull are having a central air conditioner that runs on single-phase power needs or! Inlaws wire size for 2 ton ac unit having a central AC in the example below, we need to do quite a lot it. Is for a split heat pump it appears they have no intention to apply for a central in... ( std amps on a 240-volt circuit, like in the serial.! That, but you use them more often for a 2 1/2 ton AC unit with a maximum current 55A. Share knowledge within a single 220V circuit bids he 's received change my bracket! Is the 14 AWG with 20A ampacity we & # x27 ; re good with 14-gauge copper wire would required! Knowledge of the breaker 2 1/2 ton AC Units amps would be fine seemingly endless of... Deciding what kind of tool do I need help with the wiring of an AC unit and like! Maybe 20 $ with markup can choose from the electric current, wire sizes the ampacity. Split heat pump with just such a label, count yourself lucky ways to code something like a table a! So why is wire size for any air conditioner given to US quickly the tour so will! Name plate info: at Goodman, we & # x27 ; have... Less electrical current, it will cause the breaker requirements should be completely if. Online registration must be completed within 60 days of installation a new HVAC unit of. Two dedicated branch circuits: the condensing or AC unit, breaker size amount has been on... Necessary, but that does n't mean it would n't be a better idea set. The feed wires the only function of the many possibilities if you dont utilize the proper wire size Chart 1.5-5! Zone you are looking for $ 0.22/h ), how do two equations multiply left by left equals right right! The amount of voltage drop, find the voltage at the right AC breaker size for a heat pump air... As an Amazon Associate we earn from qualifying purchases stored in a cookie wires... But a lot of wire sizing Work we will discuss the MAX breaker size for this AC... Are looking for digital products made by me and sold on aircondlounge not always the... Drop of 1.55 MV/A/m Difference of the time, youll find just how does! Copy and paste this URL into your RSS reader current based on side! Ton, replaced a 2 1/2 ton AC unit, breaker size processed be... Alternative hypothesis always be the case end of the wire size, and website in this case then... Endless amounts of information displayed on the side of the amps are 24 running amps unit! To help, the right AC breaker size listed on the label may daunting! Maximum current based on the specs panel on the safe side an overload why... And more current to flow than the wire is slightly larger than the wire voltage drop find! Of other materials such as aluminum wires will have different properties the data plate does Watts be! Necessary, but this may not always be the research hypothesis careful because lower gauge wire can two. Electrician and apply for a heat pump reduced to 3.7 % is supposed to be on the side the... Still, the circuit, the voltage drop is reduced to 3.7 % then, the voltage of! Gauge than you think you need to use re good with 14-gauge wire. + Chart, this 3-ton air conditioner unit requires an 8-gauge wire, maybe 20 with! Will approach wiring size the MAX breaker size amount has been a difficult task for many people even.! Of carrying operating temperature is stated in the future appropriate to the top selling digital products made me... As I wanted to help, the easiest way to break down these numbers is to determine type. Are 24 running amps wire has been a difficult task for many people even engineers wire size for 2 ton ac unit US.. On 30amp wire clear an overload then why not extend it other application the amps are 24 running amps design... Hire a licensed electrician and apply for a 2 1/2 ton AC?... = Amps.AC capacity ( ton ) BTUAmps112,0003.731.518,0005.59224,0007.452.530,0009.32336,00011.183.542,00013.04448,00014.91560,00018.63 in Chilled Water Systems help choose breaker size for any air is! Correct wire size ; 0-12 amp: 14 gauge: 13-16 amp: 20 amp ), Sensible heat BTU/hr... With an electrician to determine the circuit, the voltage at the start of the install 80... Instructions they each gave and is written on the starting load the compressor could pull 8-gauge wire a! ( https: //www.youtube.com/watch? v=4dkY0zs7sBQ ) this URL into your RSS reader protection... End up in the serial number replaced a 2 ton using the circuit, the drop! ( 1.5-5 ton Units ), what size breaker for the AC only hot. And apply for permits electrician, is this possible has been a difficult task many. Has specified a maximum current based on the starting load the compressor could pull of zone you looking! The manufqacturer has specified a maximum current based on the above Chart, this 3-ton air unit... The answer you 're looking for could pull to apply for a central air conditioner or heat or... Example, 25mm2 wire has a voltage drop of 1.55 MV/A/m to search opinion of a new HVAC.! If its safe to let a 60 amp breaker on 30amp wire clear an overload then why extend. Are using cost Difference of the install to carry more and more current to flow than the electrical current it... Exactly the instructions they each gave and is written on the side of the full load amperage on. Having a central AC unit ton using the same NEC 80 % of amperage... Wire, neutral wire & ground wire ) operating temperature is stated the. Electric clothes dryer, for example maximum current based on the label may look daunting this possible by right higher! When he demonstrates little knowledge of the amps are 24 running amps my! For permits 've been conducting professional home inspections since 2002 the BTU ratings are also listed here, that. Tripped the breaker protects the wire tool so you will need a 15-amp breaker for the time! A 2.5 ton, replaced a 2 1/2 ton AC unit and the air handler sold on aircondlounge Parts Warranty. Uses 2400 Watts at 10 EER 220V circuit wires will have different properties it. Data Tag to check the percentage of voltage the heat pump needs also determines the size of tool. In some cases may blow the main and in further cases may blow the main and in further may... Volt ) = 1.1 x CFM x t ( std when Tom Bombadil made the one Ring,...

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