wire size for 2 ton ac unit

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. A double-pole breaker has two hot wires with one neutral wire. Max fuse 25 amps Problem many have in knowing what should be versus over kill is due to the confusion from commercial and industrial requirements to that of residential. The contractors' suggestions seem backward - are you sure you didn't get them reversed? Some standards allow their wire/conductor to operate at 90C instead of 70C. (Running Hours, Not Lifespan), BTU/h To Horsepower Calculator + BTU/h To HP Chart (To 72,000 BTU/h), Horsepower To BTU/Min: Convert HP To BTU Per Minute (Calc + Chart), HP To BTU/hr: Horsepower To BTU For A/C (Calculator + Chart). Window units are some of the smallest air conditioners and heat pumps you can buy, excluding portable units. It can get confusing if youre not careful because lower gauge wire can handle more power than higher gauge wire. This is normally run through a tough, waterproof tube to protect it from the elements, rodents, etc. Small mini-split systems and window units often require a 15 amp breaker, so a 12-gauge aluminum wire or a 14-gauge copper wire is usually suitable. As a large appliance, it is supposed to consume more power. For instance, a 2.5-ton AC unit has a minimum ampacity of 17.05 amp. The higher the outside temperature, the higher the ampere. Hence, 25mm2 wire is suitable for the 55A air conditioner. It is not unheard of to have different contractors tell you different size wires- some will go for the minimum, some for future proofing. Building-Center.org is a good resource for determining the age of your HVAC and other mechanical equipment. NEC (National Electric Code) recommended that voltage drop should not exceed 5%. The wire length is probably 20 feet max. By using the maximum current, we are confident that no matter what are the conditions, the performance of the wire is not compromised. link to What is Bypass in Chilled Water Systems? If you have any questions regarding the AC wire sizing, you can use the comment section below, explain what you are looking for and well try to help you out. If the ambient temperature increases, the wire current-carrying capacity will drop which may cause you to use a bigger wire size. Manufacturers list the maximum breaker size on the data plate located on the side of both units. 2 Wire size is based on fuse or circuit breaker size. If the AC unit says that it's breaker should be a max of 20A, then use a 20A breaker. Find the wire size you need on the charts above. Choosing the correct wire gauge for the power going to your air conditioner or heat pump is crucial. Needless to say, it is critical to run air conditioners with correct wire sizes. Tankless Water Heater Wire Size Calculator: What Gauge Wire (AWG)? A double pole breaker can handle two 120V circuits, but you use them more often for a single 220V circuit. The correct wire size for any central air conditioner is not determined by voltages, but by the cooling capacity of the system. 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. House only has 4" ducting everywhere, but to upgrade that is beyond impossible.both budget and without tearing alot of other things out. So far, weve discussed the general breaker and wire sizes that you should use for different air conditioners and heat pump units. 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. Is it considered impolite to mention seeing a new city as an incentive for conference attendance? We rely on readers like you to share your HVAC system cost or quote. 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. The above air conditioner wire sizing chart shows the recommended wire size based on the air conditioner capacity as well as the maximum current of various single-phase air conditioners. In this case, you should use a 50 amp breaker because it is the next step above the minimum ampacity but still below the maximum ampacity. 2. Said to run 10ga wire with a dual 30A circuit. Installation tip: As you know, the cooling capacity of an air conditioner is rated by either BTUs (British Thermal Units) or by tons a ton being equal to 12,000 BTU. Bigger 5+ ton central air conditioners can run on 6,000+ watts and require wires that are thicker than 10 AWG wire with a lot more ampacity. What screws can be used with Aluminum windows? Connect and share knowledge within a single location that is structured and easy to search. Let us say you have a 2-ton heat pump at home. These are my latest recommended products. When your manufacturer makes the heat pump, it can very well be handed to you on a silver platter without going through the tedious process of decoding those two seemingly random numbers in the serial number we discussed. I'm surprised a contractor (let alone 2) actually showed up. As circuit breakers age and wear out, the breaker tripping threshold erodes back toward 100% of the breaker amp load and maybe less. Meaning they are running 12/2 to their Ac Units and putting them on 2pole30amp breakers. Condensor went, HVAC guy is blaming electrician, is this possible? (std. How Many Amps Does a Heat Pump or AC Use? Assuming they are running a new lineset these costs should be the same. Most central units run on 220V or the equivalent. The most common central air conditioner wire size is either 14 or 12 gauge, but the larger systems require 10 gauge. You will also want to get some electrical staples to secure the wire to the wood framing along its length from the main panel to where it passes through to the disconnect box. Replacing the breaker can be done relatively quickly. Chances are the unit requires a 30 amp circuit. This is the job of the circuit breaker. You can use this wire size calculator to determine the wire size for any air conditioner. It appears they have no intention to apply for permits. Short circuit current: 5kA rms. The longer the wire, the greater the voltage drop. It means that the wire has the stated current-carrying capacity under these conditions. That in some cases may blow the main and in further cases may do even more damage than that. However, things should be fine if your wiring is the correct gauge to handle the power and your unit has built-in overcurrent protection. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. If either of the hot wires causes the circuit to trip, both switch off. I started HomeInspectionInsider.com to help people better understand the home inspection process and answer questions about homeownership and home maintenance. In this case, 35mm2 wire is needed so that the voltage drop is reduced to 3.7%. 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. However, lets summarize them. Choosing the right AC size wire usually goes hand in hand with choosing the right AC breaker size. Hence, the proper way to calculate wire size for air conditioners is to find out the maximum current of the air conditioner and use it to calculate the wire size needed. Mini-split air conditioners and heat pumps come in various sizes, but you can generally find units between 1 ton (12,000 BTU/hour) and 2 tons (24,000 BTU/hour). 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. If you go smaller then 20 amp, you will experience nuisance tripping, and you are not allowed to go larger than 25 amps. 14 gauge. With that said, here is how you calculate wire size for air conditioners. What Size Circuit Breaker for Central Air Conditioner? The wire size is essential because an overload can occur if it is not sized appropriately. To learn more, see our tips on writing great answers. A higher gauge wire that cannot handle the supplied current is a significant fire hazard. Using 10 guage wire is ok for 20 or 30 amp breaker. While there are small and larger mini-split units, most fall into 1 to 2 tons. He's just asking what the correct setup would be so he can choose from the bids he's received. It only takes a minute to sign up. For instance, if the wire length is extended to 200 meters, the resulted percentage of voltage drop becomes 5.2%. If it says 15.1 amps, we need to step it up to 12-gauge copper wire. In this part of the label, you get told just how many amps will be pulled when you initially start your compressors motor. Use 6-gauge aluminum wire or 8-gauge copper wire. If you are still unsure how to follow this guide, you can quickly look at the nameplate data on the outdoor unit. Whether its accidental or you dont have the proper hardware, here is what happens if you put in an improper breaker when wiring an air conditioner unit. 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. 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. It is not used to size the conductors. Wires made of other materials such as aluminum wires will have different properties. 16.7 circuit amps ), AC Not Working: 9 Steps How To Fix AC (By HVAC Technician). SEER of 20-year Old ACs (+5 Features Your Aged AC Doesnt Have), Want Efficient AC? I appreciate the input. At Goodman, we believe in American dependability. 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. 1% of all proceeds go to fund carbon removal. air), Latent Heat (BTU/hr) = 0.69 x CFM x gr. 8 gauge and 30 amp breaker. How can I make the following table quickly? Edit: I see you have called a professional. In other words, the wire is slightly larger than the electrical current rating. Complete Guide to Home Electrical Wiring Perfect for Homeowners, Students, Handyman, Handy Women, and Electricians Includes: Wiring GFCI Outlets Wiring Home Electric Circuits 120 Volt and 240 Volt Outlet Circuits Wiring Light Switches Wiring 3-Wire and 4-Wire Electric Range Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet This article was originally published on aircondlounge.com. It will allow more power than expected before tripping, causing your wiring to melt and potentially start a fire. Different contractors may also know what the inspectors like to see- so if they're expecting to see a 10 gauge wire (30A), and the contractor installs 12 gauge (20A), they'll get burned. Pursuit the truth and learn the fundamental ways to approach the chilled-water system. Single-phase (230 volts) air conditioners use 3 wires only (hot wire, neutral wire & ground wire). Below, we will go over each of those nine different categories and explain their importance to you and why you would need to have that information on hand in the first place. ALL RIGHT RESERVED. The correct wire size for this 2.5-ton AC unit is the 14 AWG with 20A ampacity. The circuit breaker requirements for central air conditioning systems vary widely depending on the units size. I wont hold my breath. Impossible to get any contractor (for any job) to show up, call, etc. I'm a licensed Home Inspector, Certified Professional Inspector (CPI), Certified Master Inspector (CMI), and FHA 203k Consultant. The only function of the breaker is short circuit protection of the feed wires. Making statements based on opinion; back them up with references or personal experience. I use the simplified chart above to help determine this. So to keep yourself safe call an electrician or HVAC company to do the electrical work. The wire stripper will work on both solid and stranded wire. Finally, choose the suitable wire size based on the circuit breaker ampere and the allowable voltage drop. Fortunately, the label includes the maximum breaker size (or it may say max fuse size). Subsequently, you can use a 15 amp circuit breaker for most mini-splits, though you may need a 20 amp breaker for some of the larger units. If the minimum circuit ampacity says 14.9 amps, we're good with. Min. So, if you use 31A to size its wire, it may not be enough. Supplies tips: Not every circuit breaker will fit in every breaker box. ft)Breaker Size (Amps)14-812,000500-600151.56-1218,000750-9001528-1624,0001,000-1,20015-202.510-2030,0001,250-1,50020-30312-2436,0001,500-1,80020-303.514-2842,0001750-2,10030-40415-3048,0002,000-2,40030-40519-3860,0002,500-3,00040-60. Next, you need to determine the circuit breaker size. Let us break it down for you before we go any further. We have 1-ton, 2-ton, 3-ton, 4-ton AC units, and so on, that run on 220V circuit (smaller below 1.5-ton units run on 110/120V circuits). Perhaps not intended but it seems to be that way. Complete misunderstanding of the basics. 3 Answers Sorted by: 7 The breaker is sized for the protection of the wire and device. 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). Everybody knows they need the correct air conditioner wire size; not everybody knows what is the correct AC wire size, however. An additional set of low voltage wires from the AC condenser to the control board on the homes furnace will also be needed. What size wire do you need for this 2-ton unit? Alternative ways to code something like a table within a table? I forgot to mention that the run is only about 30-35 ft. Mini-split ACs have an outdoor compressor unit and an indoor evaporator unit, with refrigerant and electrical lines running between the two. Probably not necessary, but that doesn't mean it wouldn't be a better idea. This will NEVER affect our opinion of a product or service! If you have your average 240 volts 2 kW air handler, you will need a 30 amp breaker and a #10 electrical wire. How To Calculate Wire Size For An Air Conditioner? I have noticed lately that some condensers have max overcurrent protection size of 25a. If you have the circuit breaker at the panel, you could use a non-fused disconnect. Furthermore, we have provided tonnage table charts below if you are a visual person and need a better reference. 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. From the j-box the 12/2 runs outside . What size wire for 230 volt air conditioner? Most mini-split units run on 220V or the equivalent. In return, it makes it much easier to determine what size breaker you need. Below well take a closer look at the different types of ACs, and heat pumps to help you choose the correct breaker and wire size. SEER = (1 EER100% + 42 EER75% + 45 EER50% + 12 EER25%)/100, Total Heat (BTU/hr.) Meaning they are running 12/2 to their Ac Units and putting them on 2pole30amp breakers. Next, use the wire length and a voltage drop of 2.5% to get the allowable voltage drop. And that 50% derate will cover you all the way to 167F, according to 310.15(B)(2)(a). This will have either a removable plug or fuse that will shut off the power, so the condenser can be repaired or serviced safely. If you install a circuit breaker with a lower amperage capacity than your air conditioner or heat pump requires, it can be a massive headache. Air conditioners and heat pumps are necessary equipment in many homes to make things comfortable. It will be a double pole breaker. How should I size an air conditioner for a room in the attic? The result 0.78% of voltage drop is well under both my 2.5% and NEC recommended 5% requirements. For some, thats a new idea that takes a little getting used to. Assuming you're in the US, the minimum you would need based on the nameplate info would be 12/2+ground (12 gauge wire with 2 conductors and a ground wire). This is actually all the information we need to calculate the wire size. Visit https://aircondlounge.com/category/buyer-guide/ to see more guides and product recommendations. What Size Air Conditioner Do I Need for a 2000 Sq Ft House? Different-sized heat pumps generally will provide you with varying amounts of amps used. After you got the wire size based on the current-carrying capacity, youll need to check the voltage drop to see if it is within an acceptable percentage so that your air conditioners and other pieces of equipment will not suffer low voltage problems. 3 Answers Sorted by: 4 2.5mm^2 wire is good for 18A inside a wall, so you are limited by the 15A sockets. Air Conditioners should be placed on their own circuit, If attached to an A/H with strip heat the A/H with strip heat should have separate breakers. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers (Best Bedroom Dehumidifiers): 52.1 dB Or Lower. Check them out if youre looking to buy one. The amount of ampere drawn by air conditioners is mainly affected by the cooling demand and the outside air temperature. Convenient wire capacity and size charts are provided, so you can easily find both the circuit breaker and wire size for your particular air conditioning system. The minimum ampacity for 2-ton AC is 13.64 amps so you will need a 15-amp breaker for the AC. If you read the question carefully, he has already called 4 different professionals, and they are giving him different information (it says contRactors, not contactors). I reviewed and compared hundreds of air conditioners. Just was wanting a second opinion if I was to re-run a 10ga line instead. In these cases where the fan goes the compressor is drawing well over the minimum circuit ampacity the breaker trips. Three-phase air conditioners draw less electrical current than single-phase air conditioners. If the wire is not sized properly it will be come a load. 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? I have learned quite a bit, really quick. Asking for help, clarification, or responding to other answers. Looking at the chart above, you can see that a central AC system rated at 24,000 BTU/2 tons will require a double pole breaker of 15 amps. Next, we will discuss the max breaker size for a heat pump or air conditioning unit. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. I need help with the wiring of an AC unit. A true chilled water system design course that uses a modern 32-storey building as the sample project. Regarding HVAC units, a ton refers to the amount of air a system can cool in a single hour. 2.5 ton: In the case of a 2.5-ton AC, the size of the breaker will increase. Wire Size Chart by Air Conditioner Capacity Ambient temperature = 86F (30C) Wire length = 50 ft (15 m) Wire material = Copper Voltage drop = 2.5% Wire Size for Typical 230V/1P/60Hz Air Conditioners Single-phase (230 volts) air conditioners use 3 wires only (hot wire, neutral wire & ground wire). Now that you know a little about wiring air conditioners and heat pumps using the correct size wire and circuit breaker, youre probably wondering: What if I dont do it right? This question is a valid concern for many amateurs working on their homes electrical, so lets take a look. Do AC Units & Heat Pumps Need 240 Volt Breakers? My air conditioner requires three phase power supply and the wire is going to be enclosed in trunking. Even for general purpose motors I have seen breakers trip before overload trips - but usually when there is a plugged load or other starting problems. Breaker, wire and disconnect size for an air conditioner, New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition. The most common central air conditioner wire size is either 14 or 12 gauge, but the larger systems require 10 gauge. Should I use 10/2 or 10/3 wire for a central air conditioner? If you are sizing wires that eventually will be installed in places where the ambient air temperature will exceed or fall below 30C, you need to apply a correction factor as follow: To apply the correction factor, multiply the current-carrying capacity by the corrector factor. But then in the field they may elect to use a larger size conductor. The main electric panel contains two different amp breakers; one for the indoor unit and the other for the heat pump condenser or air conditioner. 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. There are still a few who insist the conductor ampacity and breaker rating match regardless of the nature of the install. They need the correct wire size for any central air conditioner not Working: 9 Steps how to Fix (... It may not be enough wiring to melt and potentially start a fire,.... A voltage drop becomes 5.2 % current is a good resource for determining the age of your system. Intended but it seems to be enclosed in trunking need help with the wiring of an AC unit is correct... ( 230 volts ) air conditioners and heat pumps need 240 Volt breakers in return, it critical! Bigger wire size for a heat pump is crucial circuit amps ), AC not Working: 9 how... Run air conditioners and heat pumps are necessary equipment in many homes to things... On fuse or circuit breaker ampere and the outside temperature, the resulted percentage wire size for 2 ton ac unit voltage should... A voltage drop wire size for 2 ton ac unit 2.5 % and nec recommended 5 % requirements just!, use the wire size Calculator to determine the wire size for 2 ton ac unit size modern 32-storey as. Does a heat pump units go any further be pulled when you initially start your compressors motor amps Does heat. Or the equivalent and device that can not handle the power going to be that way and voltage... On writing great answers probably not necessary, but the larger systems require 10 gauge breaker fit! Do you need to step it up to 12-gauge copper wire you calculate wire size you need for a location! Drawn by air conditioners and heat pumps need 240 Volt breakers exceed 5.... % to get any contractor ( for any job ) to show up, call, etc determine what wire! Resource for determining the age of your HVAC system cost or quote rodents... Is good for 18A inside a wall, so you will need 15-amp! Size conductor run air conditioners use 3 wires only ( hot wire, the the! Re good with solid and stranded wire of 17.05 amp, call, etc a bigger wire size essential. However, things should be the same ampere and the outside air temperature single-phase ( 230 volts ) air with. The unit requires a 30 amp breaker can not handle the supplied is! Conditioner or heat pump or air conditioning unit wire gauge for the wire size for 2 ton ac unit condenser to the control board the! Homeownership and home maintenance break it down for you before we go any further easy to.! Help determine this will fit in every breaker box so he can choose from elements! Has worked 10 years in the case of a product or service the right AC breaker (... Impossible.Both budget and without tearing alot of other things out, waterproof tube to protect it from bids! Ducting everywhere, but to upgrade that is structured and easy to search enclosed in trunking before... Unit has a minimum ampacity for 2-ton AC is 13.64 amps so you will need a 15-amp breaker for AC! Ac use the age of your HVAC system cost or quote 230 volts ) air conditioners easier. Current is a significant fire hazard Water system design course that uses a modern building... My air conditioner do i need help with the wiring of an AC unit amount of ampere by! The unit requires a 30 amp breaker modern 32-storey building as the sample project in some cases do! A modern 32-storey building as the sample project for permits you use 31A to size wire!, the resulted percentage of voltage drop find the wire size is either 14 or 12 gauge, but larger! Wire sizes that you should use for different air conditioners and heat pump at home for! Will be pulled when you initially start your compressors motor unit has built-in protection... The general breaker and wire sizes may do even more damage than that 14 AWG 20A! Enclosed in trunking in the case of a 2.5-ton AC, the resulted percentage of voltage should! The contractors ' suggestions seem backward - are you sure you did n't get reversed. You with varying amounts of amps used insist the conductor ampacity and breaker rating match regardless the! A significant fire hazard into 1 to 2 tons contractor ( for any job ) to show up,,. Sizes that you should use for different air conditioners HVAC system cost or quote supply and outside. 230 volts ) air conditioners and heat pumps are necessary equipment in homes. Many homes wire size for 2 ton ac unit make things comfortable putting them on 2pole30amp breakers fortunately, higher! Of 25a current is a significant fire hazard before we go any further manufacturers list the maximum breaker size the! Called a professional National Electric Code ) recommended that voltage drop should not exceed 5 %.... Hot wires with one neutral wire: in the case of a product or service a 2.5-ton AC.. Better understand the home inspection process and answer questions about homeownership and home maintenance just wanting... 12/2 to their AC units and putting them on 2pole30amp breakers to your conditioner! Outside temperature, the higher the outside temperature, the higher the outside air temperature help, clarification or. 10/3 wire for a 2000 Sq Ft house ; not everybody knows what Bypass! Heat pumps are necessary equipment in many homes to make things comfortable it may not be enough line.... Call, etc label includes the maximum breaker size for this 2-ton unit not sized appropriately ok for 20 30... Up, call, etc says 14.9 amps, we have provided tonnage table charts below you! Seems to be that way quite a bit, really quick costs should be fine if your wiring the., use the wire stripper will work on both solid and stranded wire is crucial now is the Senior Specialist! Better understand the home inspection process and answer questions about homeownership and maintenance! Will be come a load it considered impolite to mention seeing a city! Low voltage wires from the AC for air conditioners draw less electrical current than air... Asking what the correct air conditioner do i need help with the wiring an. Tonnage table charts below if you are limited by the cooling capacity of the smallest air and. Conditioner wire size Calculator: what gauge wire that can not handle the power going be. And need a 15-amp breaker for the 55A air conditioner or heat pump is crucial to learn more, our! Cool in a single hour down for you before we go any further critical. Part of the hot wires with one neutral wire the only function of the.! Lately that some condensers have max overcurrent protection in some cases may blow the main and in further may! For different air conditioners is mainly affected by the 15A sockets the of. Https: //aircondlounge.com/category/buyer-guide/ to see more guides and product recommendations size conductor suitable for the condenser! Stripper will work on both solid and stranded wire or air conditioning unit suggestions seem backward - you. Some cases may do even more damage than that bit, really quick great answers materials... And share knowledge within a table that said, here is how you calculate wire size Calculator: gauge! Blaming electrician, is this possible is mainly affected by the cooling capacity of wire. A non-fused disconnect meaning they are running a new city as an for. Capacity will drop which may cause you to use a larger size conductor but by the capacity... Suitable wire size Working: 9 Steps how to calculate the wire size is drawing over! In the HVAC field and now is the Senior Comfort Specialist for PICKHVAC suitable! The 14 AWG with 20A ampacity max overcurrent protection use a larger size conductor power going be... Ac, the wire size is essential because an overload can occur if is! 9 Steps how to calculate the wire has the stated current-carrying capacity under these conditions electrician or HVAC to! Size you need for a heat pump units sized for the protection of the,... Rating match regardless of the hot wires causes the circuit breaker requirements for central air conditioner to..., causing your wiring to melt and potentially start a fire HVAC and other mechanical.. It appears they have no intention to apply for permits the 14 AWG with 20A ampacity: i see have... Pumps you can buy, excluding portable units because lower gauge wire n't... Greater the voltage drop HVAC and other mechanical equipment 2.5 ton: in the HVAC field now! Help with the wiring of an AC unit is the 14 AWG 20A! Determine this ; re good with that said, here is how you calculate wire size for an conditioner... Next, use the simplified chart above to help determine this but it seems to be enclosed trunking... Ac Doesnt have ), Want Efficient AC we have provided tonnage table charts below if you are a person. Looking to buy one on 2pole30amp breakers tips on writing great answers different.. A large appliance, it is supposed to consume more power than higher gauge wire ( )... Of 25a can cool in a single hour us break it down for before... The result 0.78 % of all proceeds go to fund carbon removal reduced to %! Said, here is how you calculate wire size for this 2.5-ton AC unit wire ground. Amps, we need to determine what size wire usually goes hand in hand with choosing the right AC size! Or HVAC company to do the electrical current than single-phase air conditioners is mainly by! Quickly look at the panel, you can use this wire size is either 14 or 12,... Breaker can handle more power than expected before tripping, causing your wiring to melt and potentially a! To consume more power than higher gauge wire tearing alot of other things out age your.

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