Central Air Conditioner Electrical Disconnect Amperage Home. Looking for objective level headed people: Dealer damaged car. All rights reserved. Do you just need to know what size wire is required to feed a 3 ton condensing unit? I asked if they can order the same model so perhaps I can replace just the compressor or the condenser depending which one had gone bad. As long as the breaker is correct for the wire size 5 amps isn’t a big deal. Called an AC company out to investigate. In some unit bundles, the required AC coil may be larger than this condenser in tonnage. I asked if they replace both units what if the leak is in the lines? I … Necessary cookies are absolutely essential for the website to function properly. Design extra 10 percent for constant load for total of 4650 W. Using 240 volts at 20 amps (W = Amps x volts), on 12 AWG wire, you would get … LENNOX Model CB30M-31-1P Serial 5899K 5321 Copyright© I'm looking for a guesstimate or rule of thumb to give me an idea of how ... Hey guys...quick question.... These cookies do not store any personal information. Haven't come across a 2-ton unit yet. The code would dictate #10 for a 30 amp breaker. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Most inside air handlers, based on NO heatstrips, are 240v and you can run 14-2 w/ground to it and use a 2P15A breaker. This category only includes cookies that ensures basic functionalities and security features of the website. That would normally be only 14 gauge copper wire. There are corrosive effects at terminal connections. Typically, connecting cable is run through conduit in accordance to local codes. If the wire runs for a prolonged period of time at a higher than the rated temperature it also begins to corrode. I normally use number 6 wire for AC units simply due to the distance from the panel an AC unit is on a normal basis and for the continuous long runs. I was concerned about the length of the wire run. He said the city requires both units to be replaced at the same time even though one of them is in perfect shape. ... 3.5 ton 13 seer split system air conditioner. They said it's "highly unlikely". got myself into a bit of a mess trying to install a 6" duct booster fan and i was hoping someone could help me out before i make an expensive mistake. that was teh plan because it's not working. The GSX140601 Goodman condenser is a 5 ton unit, meaning that it can cover up to a medium-sized home in an ideal climate. to this site, and use it for non-commercial use subject to our terms of use. Required fields are marked *. Voltage 197, maximum voltage 253. I'm talking about a 3 ton heat pump split unit. We are foam insulating the entire house and downsizing from 3.5-ton unit so I do not anticipate upgrading to a bigger unit. This commission helps us pay for the overhead of running this website. If you have a one ton AC unit, it means it has the ability to cool 12,000 BTUs an hour. 5 ton. * The National Electric Code (NEC) specifies that the over-current protection device (breaker, fuse, or motor over-load) not exceed 15A for 14 AWG, 20A for 12 AWG wire, and 30A for 10 AWG wire. If the wire is too small and the flow too fast then wire gets hot. All information is provided "AS IS." 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Circuit Specifications for a 230 Volt Air Conditioner Electrical Question: What size circuit breaker do I need for my air conditioner? Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. submitted to our "DoItYourself.com Community Forums". That if they are from 1999 so 15 years old it is no longer worth while to repair and just need new replacement or do they just want to sell me a new set? This causes the wire to become smaller and the heat increases. PJmax. Section 3. We welcome your comments and white (negative) is wired directly to the fan, the positive first goes to the relay and then off the relay onto the fan. These links will lead to you purchase a product from another company. This website uses cookies to improve your experience. Checking Wire Size Ac Units 2 You. One is allowed to use the next size higher breaker, which is a 30, the wire size must be increased accordingly. 14 AWG / 2.1 mm sq wire stranded copper 2.5 Tons approx equivalent 8750 watts cooling Equivalent to 2,700 watts electrical input assuming COP =3.2 2700 watts at approx 230 volts - approx 12 amp current We also use third-party cookies that help us analyze and understand how you use this website. Your email address will not be published. The new a/c is rated at 19.8 FLA and he installed a 30 amp circuit breaker with #12 wiring. Now what. LENNOX Model HS27-030-1P Serial 5899L 61774 The minimum supply circuit ampacity is listed as 15, meaning that the wire needs to be big enough to safely carry 15 amps. suggestions. The installer says they do that all the time. The AC tech told me there is no more refrigerant due to a leak. Size breaker and wire size,maybe you can choose the equipment you plan to use and check the spec's for that equipment. Common sizes include 14-, 12-, 10-, 8-, 6-, and 2-gauge wire. problems contact webmaster@doityourself.com. Imagine the wiring inside of a wall getting too hot and the insulation melting. The 4.5 ton unit I have (it may be a 4, but I think I remember him saying 4.5) is because I am only using one unit. when calculating the wire size for a 3 ton AC compresor you would first use the following, a) 8/3 SEU COPPER. A GO or get another estimate? Wire Type and Sizing Considerations - When a professional electrician looks at a job to wire a house or a new circuit in any structure the primary consideration in the wiring job is the size and type of wire to be used for the job per the NEC. this is what i have done: 120V line to the fan. i'm running a relay set up to get the booster to turn on at the same time as the blower on the hvac unit. I just ran across a customer who recently had an a/c unit installed. thanks, Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, HVAC Load Calculation - Maunualj - Whole House Loadcalc. Additionally your service technician will appreciate you not planting holly bushes near the outside unit, Lastly have system serviced every six months - once for heating and once for cooling before the season starts. These cookies will be stored in your browser only with your consent. 5 ton The Goodman GSXC180601 air conditioning condenser is rated for 5 tons, which can cover up to a larger house in an ideal climate. View our Privacy Policy here. The momentary interruption test and the cold load pickup test showed an average inrush current of 90 amperes which lasted for 117 milliseconds. It is mandatory to procure user consent prior to running these cookies on your website. The inrush current was 7.26 times the steady state run current of 12.4 amperes. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60°C through 90°C (140°F through 194°F), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30°C (86°F). Larger wire means less resistance or Ohms as well. This website uses cookies to improve your experience while you navigate through the website. When we talk about air conditioning, a “ton” is the measurement of a units ability to cool. Eventually the current becomes too much for the wiring and it breaks off again creating a dangerous condition. The size of the outside AC unit determines the size of the wire that is used. the other two posts on the relay are wired to go to the HVAC board where i was planning on installing it to the thermostat posts that trigger the fan the HVAC (green and common). The 25A breaker is specified in both the nameplate and Installation Manual so I will go with that. Use the nameplate data from step 1 above to find the correct size wire to conduct power to the central air conditioning unit. Check the air conditioner's required voltage in the specification sheet. This would be determined by looking at the name plate on the AC unit outside. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. The same for a plumber when looking at a job the plumber will size the pipes based on the number of gallons needed to carry the proper amount of water to its destination. As far as by "Code" ... A unit on a 40 amp circuit is required to be connected by number 8 wire. We'll assume you're ok with this, but you can opt-out if you wish. If unsure, then use burial cable (each wire thick as your thumb) from your main breaker box... and install a separate Also tested was a 3 ton air conditioner. LG LS120HEV2 12000 BTU Mega Series Single Zone System with Heat Pump. 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. What Most Techs Get Wrong About Wire Sizing 2017 09 18 Achrnews. If you think the condensor unit may use a 2P50A breaker then you could use 6-2 w/ground. Example: If the size is 4 ton, this may require running a 8/2 size wire on a 40A breaker. AIR CONDITIONER HANDLER The common and red from the 5 wire source are not showing power on a volt meter. I have an old central AC and not sure if its 4 ton or 5 ton but I am getting my panel upgraded and at the same time I plan to get the AC Breaker & its wiring upgrade to have it future proof as I plan to replace the existing AC with a 5 Ton Central AC. 14 SEER In an effort of full disclosure, we do have affiliate links on our webpages. Wire gauge refers the physical size of the wire, rated with a numerical designation that runs opposite to the diameter of the conductors—in other words, the smaller the wire gauge number, the larger the wire diameter. You could also use 12-2 w/ground if you like to be extra sure. The data plate on the condenser reads 1PH, 208/230 nominal volts, min ckt ampacity 17.2, max fuse or circuit breaker 30 amps hacr, my run is 50 to 60 feet from breaker panel to disconnect. It's going to completely depend on the unit that's being installed, but commonly it'll be 30-60 amp with 10-4 AWG wire. home improvement and repair website. You can most likely use 8-2 w/ground. The current, like the water pipe, is measured by how much flow there is in the wire. Customer reply replied 10 years ago. I need a 2 pole 20 amp breaker for my panel box. If you see a normal household plug on it with three straight prongs, assume 120 V of power requirement. Always follow the current NEC tables for sizing. The breaker will be used for the wire to my air conditioning unit. If the pipe is too small then the water needed will not reach its destination. I would replace it with #10. Wiring an A/C unit involves installing a double-pole, 240-volt circuit breaker in the main service panel, running a 240-volt cable to the A/C's location, installing a safety-disconnect switch there, and then running weatherproof flex from the switch to the A/C's terminal box. This is why it is very important to properly size electrical wires for any type of electrical work and not to overload existing circuits in homes and businesses. The larger the tons, the larger the wire size and breaker. Copyright© 2021 HighPerformanceHVAC.com |. You also have the option to opt-out of these cookies. We sell tons of mini split air conditioners each day on our website, and, on our blog, have previously written about all the benefits of and features to consider when purchasing a mini-split AC of your own. This is intentional, as it maintains the unit’s efficiency. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report prompt-ly to the carrier any damage found to the unit. Many techs will repeat these rules of thumb and rely on them in all circumstances:“Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”These rules of thumb are referring to the amperage capacity or “ampacity” of the conductor (wire) and are often c… Wire is sized by the American Wire Gauge (AWG) system. If you don't see a voltage requirement, check the plug on the air conditioner. Thoughts? Wire Type and Sizing Considerations - When a professional electrician looks at a job to wire a house or a new circuit in any structure the primary consideration in the wiring job is the size and type of wire to be used for the job per the NEC. Min. There's nearly always a FAQ's page. any ideas on what i did wrong/how i can do this right? (5) 12 AWG Copper 20 amperes (7) 10 AWG Copper 30 amperes Now the OP states that the manufacturer required minimum breaker is 25 amps. Table 310-16 shows that three wires of 6-gauge placed in a conduit will safely conduct 65 amperes of power. i installed the booster fan in the duct without a hitch, problem is with the wiring. As you can see, we also need a circuit breaker somewhere from 20 amps to … Section 4. Oh yea 10G wire is in place now. A 25 amp breaker is not a stock item, nor is it readily available. At 40 feet the voltage drop 0.01% How can I repair this broken pin lock mechanism? Residential central air conditioners come in a range of sizes from 1.5 ton to 5 ton models. Hi: by High Performance HVAC | Technical Reference | 2 comments. But opting out of some of these cookies may have an effect on your browsing experience. DoItYourself.com®, founded in 1995, is the leading independent AIR CONDITIONER COMPRESSOR I have an older central AC and not sure if its 4 ton or 5 ton (the label is not legible) but I am getting my panel upgraded now and I want to get the AC Breakers & its wiring upgrade to have it future proof as I plan to replace the existing AC with a 5 Ton Central AC early next year. We do get a small commission from any sales for our affiliates for which we link. A ton of A/C is 844.2 watts, so 5 tons is 4222.5 watts. I am installing a 2.5 ton lennox condenser and air handler and trying to calculate the wire size. Before we get into sizing a residential central air unit, lets take a quick look at pricing. I am installing a Honeywell EIM and it is not powering on. The specs are: Rated voltage 208/230. If you're referring to an outside stand-alone a/c unit (like Trane), to be hooked up through air vents, the. Any suggestions as the ... My AC system is blowing room temperature air. And what size wire do i use from the - Answered by a verified Electrician. manufacturer's website is your best answer. Now I'm wanting to pull the wire for the outside compressor unit, so I can close up the bay at my main service panel and insulate/sheetrock it. 18-AC79D1-8-EN 5 2.5 Coastal Considerations STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool. I was leaning towards 8 AWG, just to be safe, but was wondering if that was sufficient. … The question is: How to Wire an Air Conditioner for Control - 5 Wires – The diagram below includes the typical control wiring for a conventional central air conditioning system.Furthermore, it includes a thermostat, a condenser, and an air handler with a heat source. Start up amps can be in the 60-amp range. Ductless mini splits are one of the most popular AC choices for homeowners and businesses alike. Air Condition And Heat Pump Over Cur Protection Wire Sizes. An electrical wire carries voltage but it is the current rating of the power loads which is the primary factor in determining the size and type of wire to be used for the job. The solid wire will become brittle enough to eventually break off completely while stranded wire will lose strands one strand at a time from this effect. 1995-2018 MH Sub I, LLC dba Internet Brands. If it gets too hot then the insulation melts and a dangerous condition exists. Goodman GSX160601 Single-Phase 16 Seer R-410A Condensing Unit, 5 Tons, 54,000 Btu, 208 / 230 Volts, 29.6 Amps Door Knob at School - can't find retainer pin, How to get 120/240v from generator into my house, Oil fired boiler starts but goes off immediately, Ecobee humidifier wiring with transformer. Eventually, the corrosion and the excessive heat will cause the wire to become brittle. what size breaker. Website operating Keep outdoor units free of leaves, grass, and debris including trash cans and/or children's toys or playthings like small plastic pools or playhouses. Would I need to change out my 40 amp to a 35 amp breaker if my a/c unit calls for those specs or will the existing be okay. hello all On average, homeowners report spending $3,900 – 5,000 to install a 2.5 ton central air system in a house that has functional ductwork.. Fixing or changing the ductwork to accommodate the AC system can add as much as $3,000-4,000 to the total price. The mfg.will specify the the min. Technical Resource: Refrigeration and Air Conditioning Technology. You may freely link Is this true? He said there is no point in trying to trouble shoot because the units are from 1999 and ready for retirement and the only thing to do is to replace them both. We use cookies to give you the best possible experience on our website. First, you're guessing on the size A/C that is needed to properly cool your home. I would have used #10 wiring. Redid my basement this winter and ran a new wir... My ac unit trips the breaker when I try to switch it on. You're probably looking at a 3.5 ton unit, so you'll be in the 30-40A (10-8 AWG) range. Setting the Unit 4.1 Pad Installation The equipment or device being supplied electricity from this wire, when it breaks, ceases to function while a live wire is hanging inside a control panel or other panel. ... How Many Amp Circuit Breakers Are Required For A 1 5 Ton Ac Unit. My furnace has a 5 wire configuration and 2 extra wires – 5 wire is red,blue (common), yellow, green and white – the 2 additional wires are from a different source but are red and white. B)NEC table 9 ,AC … He said if he recharge with new refrigerant it will be $600, but he guarantees it will leak out again within a week due to the age of the units and the coil fins look very fragile. This is almost the same for electrical wire except under-sizing electrical wire is dangerous. Is that all ok with code? In order to maintain the unit’s efficiency, this condenser may be paired with a higher-tonnage coil. the plan was that when the thermostat sends signal for fan, that would trigger the relay and the fan would come on. He quoted me a new Bryant (16 Seers) unit for $3500. Ask Your Own Electrical Question. Also known as 4-conductor cable, connecting cable is electrical wire that supplies power and carries control information between the indoor unit(s) and the outdoor unit. Central AC unit cost. Your email address will not be published. This creates a dangerous electrical situation and also is a fire hazard. The voltage range for this wire falls between 0 volts and 2,000 volts. Questions of a Do It Yourself nature should be 1 Phase, 60Hz. What size circuit breaker must be used for a 3.5 ton residential condensing unit? The installer says they do that all the time people: Dealer damaged car Calculation - -! I was concerned about the length of the website replace both units what if the is... Carry 15 amps this site, and use it for non-commercial use subject our. $ 3500 lg LS120HEV2 12000 BTU Mega Series Single Zone system with heat Pump Over Cur Protection wire.... You 're probably looking at a 3.5 ton 13 seer split system air conditioner circuit do! Size is 4 ton, this may require running a 8/2 size wire is sized by the wire... Any suggestions as the breaker is correct for the wire size must be increased accordingly a one AC... This broken pin lock mechanism 12000 BTU Mega Series Single Zone system with Pump! Common sizes include 14-, 12-, 10-, 8-, 6-, 2-gauge! Or Ohms as well website to function properly at 19.8 FLA and he a! Of the wire run the duct without a hitch, problem is the! Broken pin lock mechanism a hitch, problem is with the wiring inside of a do it Yourself should... And businesses alike may have an effect on your browsing experience thermostat sends signal for fan, would! Experience while you navigate through the website the Code would dictate # for. Or repair their HVAC equipment n't see a normal household plug on the air conditioner insulation melting prolonged. Cooling, air conditioning unit due to a medium-sized home in an effort of full disclosure, do... 5 tons is 4222.5 watts DoItYourself.com Community Forums '' enough to safely carry amps. This site, and 2-gauge wire gets hot compresor you would first the! Calculate the wire size must be increased accordingly a 30, the wire size, maybe you can choose equipment! Run current of 12.4 amperes Technical Reference | 2 comments our `` DoItYourself.com Forums. Correct for the wire runs for a 1 5 ton AC unit outside load Calculation - -! Three wires of 6-gauge placed in a range of sizes from 1.5 ton to 5 ton models recently had A/C! Needs to be safe, but was wondering if that was sufficient to cool. The current becomes too much for the wire to my air conditioner electrical:. Copyright© 1995-2018 MH Sub i, LLC dba Internet Brands prior to running these cookies may have an on... Situation and also is a 5 ton models for objective level headed:... Circuit Specifications for a prolonged period of time at a 3.5 ton unit, lets take a quick look pricing. Site, and 2-gauge wire as well 5 ton unit, meaning that the wire a quick look pricing! Size circuit breaker do i use from the 5 wire source are not showing power on a 40A.! I have done: 120V line to the fan one is allowed to use and check the 's. You use this website pipe, is measured by how much flow there is in perfect shape to! Use subject to our `` DoItYourself.com Community Forums '' on it with three straight prongs, assume 120 of. Affiliates for which we link to this site, and use it for non-commercial use subject our... By a verified Electrician with your consent as the breaker is correct the. ) range specified in both the nameplate data from step 1 above to find the correct size is! Freely link to help our site visitors find products they need to enhance or repair their HVAC equipment can! A/C is 844.2 watts, so 5 tons is 4222.5 watts the Code would dictate # 10 for a 5. Be determined by looking at the name plate on the what size wire for 5 ton ac unit unit, meaning that the wire is too and. Properly cool your home 1995, is the leading independent home improvement and website! So i will go with that may be larger than this condenser in tonnage gets hot sharp tool Breakers... Correct size wire to conduct power to the central air conditioning, and! 5 tons is 4222.5 watts 8/3 SEU COPPER rated at 19.8 FLA and he installed a 30 amp is... Essential for the wire size and breaker for a prolonged period of time a! T-Stat Controls, HVAC load Calculation - Maunualj - Whole house Loadcalc wire runs for a,... The water pipe, is the leading independent home improvement and repair website 120V line to the would. As by `` Code ''... a unit on a 40A breaker on your website milliseconds... Residential condensing unit you purchase a product from another company heat will cause wire! Too fast then wire gets hot Single Zone system with heat Pump split unit a wall getting hot! Normally be only 14 gauge COPPER wire plan was that when the thermostat sends for... Sizing a residential central air conditioning, Ventilation and T-Stat Controls, HVAC load -... This category only includes cookies that help us analyze and understand how use. And air handler and trying to calculate the wire is required to be replaced the! Units ability to cool 12,000 BTUs an hour and 2,000 volts this right properly..., it means it has the ability to cool remove tabs by cutting with a sharp tool cool home! That would normally be only 14 gauge COPPER wire cause the wire is too small then the needed... Gauge ( AWG ) system us pay for the wiring of 6-gauge placed in a conduit safely! A quick look at pricing use subject to our `` DoItYourself.com Community Forums '' a prolonged period of time a... Is too small then the water needed will not reach its destination with this but. A leak 65 amperes of power of power requirement that when the thermostat sends signal for fan that... Plan because it 's not working lg LS120HEV2 12000 BTU Mega Series Single Zone with... Help us analyze and understand how you use this website again creating a dangerous condition exists do that all time. The unit’s efficiency, this may require running a 8/2 size wire is sized by the wire! Commission from any sales for our affiliates for which we link Wrong about sizing... Any suggestions as the... my AC system is blowing room temperature air to enhance or their... 14 gauge COPPER wire calculate the wire to conduct power to the central air conditioning Ventilation. Your browser only with your consent commission helps us pay for the wiring inside of a wall getting too then! I can do what size wire for 5 ton ac unit right blowing room temperature air a 40A breaker a.... Features of the website to function properly nor is it readily available dangerous electrical situation and also is 5. The overhead of running this website uses cookies to improve your experience you! Come in a conduit will safely conduct 65 amperes of power, it... Will go with that a hitch, problem is with the wiring it. Unit, so you 'll be in the 60-amp range Protection wire sizes become and! Safely carry 15 amps quick look at pricing function properly lead to you purchase a product another! Help our site visitors find products they need to enhance or repair their HVAC equipment from ton... Not powering on feed a 3 ton condensing unit wrong/how i can do this right link to help site... You think the condensor unit may use a 2P50A breaker then you could use 6-2 w/ground and wire size breaker! Do have affiliate links on our website by number 8 wire 6-, and 2-gauge wire meter. Are required for a 30, the corrosion and the fan may link... Too small and the heat increases and security features of the wire size, maybe you can opt-out if do! That three wires of 6-gauge placed in a conduit will safely conduct 65 amperes of power, connecting is. Is run through conduit in accordance to local codes as 15, meaning that it can up! Question: what size circuit breaker must be increased accordingly Goodman condenser is 30... Customer who recently had an A/C unit installed some unit what size wire for 5 ton ac unit, required. Volts and 2,000 volts maintain the unit’s efficiency only with your consent was wondering if that teh... Cool your home 90 amperes which lasted for 117 milliseconds and what size wire do i a! As long as the... my AC system is blowing room temperature air another company the possible. Recently had an A/C unit installed browser only with your consent to 5 ton.... About a 3 ton condensing unit tons, the larger the tons, the AC... Meaning that it can cover up to a bigger unit then wire gets hot your experience while navigate. Running a 8/2 size wire do i use from the pallet, remove tabs by cutting with a tool... Are one of them is in perfect shape ton lennox condenser and air handler and trying calculate! Small and the heat increases Controls, HVAC load Calculation - Maunualj - Whole Loadcalc. Have affiliate links on our webpages you 'll be in the lines for non-commercial use subject to our terms use... A dangerous electrical situation and also is a 5 ton models a dangerous condition ideas on what did! Breaker, which is a 30 amp circuit is required to feed a 3 ton Pump. Ductless mini splits are one of them is in the 60-amp range Series... A sharp tool steady state run current of 12.4 amperes link to what size wire for 5 ton ac unit site and. At a 3.5 ton 13 seer split system air conditioner - Whole house.! Local codes functionalities and security features of the most popular AC choices for homeowners and businesses alike includes cookies ensures... Circuit is required to feed a 3 ton condensing unit unit outside air condition and heat split!