And what size wire do i use from the - Answered by a verified Electrician ... 3.5 ton 13 seer split system air conditioner. An excerpt for the electrical data for the Goodman GSXC16 air-conditioner is shown below. Below are indicative breaker and wire gauge sizes for 1.5, 2, 3, 4 and 5 ton (18,000, 24,000, 36,000, 48,000, 60,000) BTU air conditioners respectively based on the Goodman series. 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. pogness Only 13 left in stock - order soon. The specifications for your 18000BTU AC unit is helpful, however the size of the circuit for this particular AC unit would be indicated by the size of the male plug-in on the end of the cord. Use the specified minimum circuit ampacity value, in this case 13.6 A to find the wire gauge. A unit that is oversized will turn on and off too frequently, called âshort cycling.â Short cycling causes the unit to lose both efficiency and the ability to properly dehumidify the home. 4 ton The Goodman GSZ160481 heat pump is rated for 4 tons, which is normally enough to cover a larger house in average climates. The eqpt manufacturer's rating governs and it says that a breaker of 40A max is permitted. 00. I know this goes against what many of you have been told and understood your entire career, but take a deep breath and read on. 440.22 Application and Selection (A) Rating or Setting for Individual Motor-Compressors â The motor compressor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current of the motor. A 4 and 5 ton air-conditioner will likely need a circuit breaker rated 45-50 A connected with 8-10 AWG wire when supplied with 197 – 253 volts. You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. WIRE CONTACTOR: A wire and contactor displaying the 90°C rating on the wire and 75°C rating on the contactor (when properly torqued). installed for that AC eqpt with the wire size and treat it like it was a water heater, or a receptacle circuit. Wire gauge calculations Wire diameter calculations. The central air conditioners that are installed in your home range from 1.5-ton to 5-ton units and increase in half-ton increments (2-ton, 2.5-ton, 3-ton, etcâ¦). All of these ratings can be found in NEC (NFPA 70) Table 310.15(B)(16) in detail, but as an example, according to this NEC chart, a 6-gauge copper circuit rated at 90°C (194°F) has an ampacity of 75 amps while a 6-gauge aluminum conductor rated at 60°C (140°F) has an ampacity of 40 amps. The last 4 ton AC condensing unit I installed used #14 THHN/THWN > copper in conduit. It is rare that a building department will ignore entire articles of the NEC when it is brought to their attention in a respectful manner. The environmentally sound refrigerant allows you to make a resp 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. My first job in the trades was as an electricianâs apprentice doing tasks, such as pulling wire, building light fixtures, and moving scaffolding in grocery store renovations. For every piece of equipment that lists MOCP and MCA, you are given the breaker size and minimum wire ampacity. The recommended wire and breaker size will be determined by the your heaterâs power rating and voltage. You're probably looking at a 3.5 ton unit, so you'll be in the 30-40A (10-8 AWG) range. Is it aluminum, copper, or something else? 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. Easy To Use A/C Size Selection Tool: Check the color coded map above and confirm the zone your home is in. AC Unit Size Calculator accurately estimates the size of the central air conditioner unit you should install in your house. CARRIER TAG: A data tag showing a 50-amp max breaker with a 31.4 minimum ampacity, which still allows a No. You do still need to change the breaker to correct size, but that's cheap. The breaker and wire size will largely depends on the power consumption (W) of the air-conditioner. While no standard is perfect, I have found that knowing the NEC and looking carefully at manufacturer listings and labels can save you time, your customers money, and help keep everyone safe. Â. I want to hear from you. Always check the electrical data for your specific air conditioner model. This is not uncommon, but it is usually a matter of a respectful conversation about the above NEC articles. By visiting this website, certain cookies have already been set, which you may delete and block. 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. This is not dictated by the NEC but rather by the requirements of the connected load. I'd probably go with a 40 amp since you won't find a 45. While certain local legislation may supersede the NEC with additional regulations, the NEC is a nationally recognized standard throughout the U.S. Are there multiple conductors in a raceway, high ambient conditions, etc.? ⦠The inrush current was 7.26 times the steady state run current of 12.4 amperes. For example, a 3 Ton AC would need a ¾ inch suction line when the distance is 25 feet or less, but if it's over 25 feet, you would likely need a 7/8 or 1 1/8 suction line to get your full efficiency and capacity. This can be quite confusing. As you can see, for the smaller AC the manufacturer specifies a wire size of 12 gauge minimum and a breaker size of 35 amps. Many techs will repeat these rules of thumb and rely on them in all circumstances: âTwelve-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,â and âThe circuit breaker or fuse is always sized to protect the conductor [wire].â. I am certainly not suggesting HVACR techs engage in performing work outside of their skills or licensures, but, in many cases, being able to identify the problem and making the repair are two different things. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. As above, the MOCP is usually significantly higher than the MCA, but this is to allow for the spike in amp draw upon motor start. You're probably looking at a 3.5 ton unit, so you'll be in the 30-40A (10-8 AWG) range. To size the wire and circuit breakers refer to the minimum amperage rating and minimum ampacity values in the electrical data section of your air conditioner. You still need to check the manufacturer’s website or technical specifications manual to get the recommend breaker and wire size. At 40 feet the voltage drop 0.01% If any portion of the circuit utilizes non-metallic (NM) cabling â often known by the trade name Romex® â it must be rated at 60°C (140°F) according to article 334.80 of the NEC. Name plate states 240V, MCA= 26A, MOP= 45A. A 30 amp circuit requires a MINIMUM of #10 wire. Air conditioner compressor and fan motors are largely inductive (magnetic) loads and have different characteristics than purely resistive circuits. This is necessary because at start-up, the air conditioner motors momentarily draw a large surge current which eventually normalises to a lower value. Many will ask what protects the circuit in an overload condition between the MCA and MOCP ratings? It's also quiet, so you won't give your indoor home comfort a second thought. The rule-of-thumb sizes rely on the lowest allowable temperature rating of the wire; in some cases, the circuit may have a higher ampacity if the insulation on the wire and the connection endpoints are all rated at 75°C (167°F) or 90°C (194°F). The last guy installed the heavier wire so you'd be "good to go". During service calls, being able to identify undersized conductors can help resolve compressor start issues or intermittent trips of breakers or fuses. Growing up in a family surrounded by electricians, we were always discussing codes and theory around the house. For a 30, 40, 50 gallon water heaters with the following ratings, 30 gallon (2000 W, 120V), 40 gallon (5500V, 240V), 50 gallon (4,500W, 240V), the minimum wire sizes for your water heaters would be 20, 25 and 20A respectively. This means it is allowable to install this unit on a circuit breaker rated at 50 amps and a conductor rated at 28.6 amps, according to the NECâs NFPA 70. He has been involved in technician training for 15 years. These ratings on the data tag tell us exactly what minimum ampacity the circuit must be capable of carrying as well as the maximum size the circuit breaker or fuse may be able to protect the circuit against in an overcurrent condition. I mentioned that the minimum wire size for this air conditioner would have to be 8-gauge, and a 60-amp circuit breaker would normally be too large for that size wire... but it doesn't matter. Take a look at the Lennox air conditioning condensing unit tag on Page 19. Article 440 has specific guidelines for HVAC and refrigeration equipment manufacturers to follow when writing the equipment data tags as well as for electricians when sizing conductors. What is the allowable voltage drop based on wire length? Visit our updated, The Impact of Adding or Removing Water from Air, The Five Pillars Of Residential A/C Refrigerant Circuit Diagnosis, Understanding the Use of Suction Filters/Driers, Why Air Conditioning Systems Freeze and How to Fix Them, How to Properly Diagnose Low-Voltage Short Circuits in the Field, Four Mistakes for Beginning HVAC Techs to Avoid, Donât Be Brazen When It Comes to Soldering and Brazing Techniques, Organization Helps HVAC Techs Get a College Education. $1,610.00 $ 1,610. Price and other details may vary based on size and color. For example, using the Goodman GSXC16 airconditioner’s electrical data above and following the guidelines 1 and 2 above, the breaker size should be 20A and the wire gauge 14 AWG. ELECTRICAL PANEL: A properly marked outdoor electrical panel is pictured above. In some cases, contractors have stated that certain municipalities are requiring that conductors be sized based on the breaker size instead of the MCA. Goodman's circuit breaker size specs= 4 ton 13 SEER heat pump condensing unit - max 45 amps and min 26.4 amps. Example: If the size is 4 ton, this may require running a 8/2 size wire on a 40A breaker. The minimum circuit ampacity and maximum overcurrent protection values help size the wire and breaker appropriately.Â. Size of Wire for Central Air Conditioner 4ton and 3 ton. Design, CMS, Hosting & Web Development :: ePublishing. lines, make sure you have the correct size line based on the length of run. Older or less efficient units will likely draw more power and hence need larger breaker ratings compared to newer and more efficient air conditioners with the same cooling capacity (ton or BTU). These ac units will likely be connected to their own dedicated circuit because of the large current draw (50-60 Amps). Use the nameplate data from step 1 above to find the correct size wire to conduct power to the central air conditioning unit. 10 wire on a 50-amp breaker. Keep in mind though that these breaker and wire sizes are a guide. The 116B has been designed utilizing Bryantâs Puron® refrigerant. 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. Knowing appropriate and inappropriate breaker and conductor sizes will save you and your customers time and money. If you hesitate at the thought of doing this math for every system you work on, the NEC Article 110.3(B) states: Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. Results 1 to 7 of 7 ... A 4 Ton 240V unit would probably have an MCA of 30 to 35 amps which requires a #8 copper branch circuit. 10 circuit with a 75°C wire and termination rating. Look at the amperage rating on the unit. 3.9 out of 5 stars 20. It is not. Appliances, Wire sizes. Also tested was a 3 ton air conditioner. Is the conductor aluminum or copper, and is the insulation rating 60°C (140°F) or greater? The Rheem RA14 Air Conditioner offers the solid technology and energy-saving performance you've come to expect from Rheem. #12 is for a 20 amp or less circuit. installing a residential 4 ton central AC unit. If the size is a 3 to 3 1/2 ton unit, then running a 10/2 size wire on a 30A breaker may be good. This comes from the 2017 edition of the NEC NFPA 70. By closing this message or continuing to use our site, you agree to the use of cookies. What other thermal de-rating conditions exist? When this is done, the conductor will be properly sized according to the NEC. Tell me how we can improve. The air-conditioner breaker rating may be nearly double the manufacturer’s specified minimum amp rating. By visiting this website, certain cookies have already been set, which you may delete and block. Aluminum wire has a lower ampacity than the same gauge copper wire, meaning aluminum must be larger to accomplish the same ampacity job as copper wire. Bryant® Air Conditioners with Puron® refrigerant provide a collection of features unmatched by any other family of equipment. The n gauge wire diameter d n in inches (in) is equal to 0.005in times 92 raised to the power of 36 minus gauge number n, divided by 39:. For example, a model SSX160241 is a 2 Ton (24,000 BTU) air conditioner. The key is to reference NEC NFPA 70 Table 310.15(B)(16) to find the ampacity of a conductor and size that conductor according to the MCA listed on the unit label. If the unit requires 240V 30A, you will run either 10-2 or 10-3, depending on whether the unit requires a neutral, for 50 feet or less from the panel. If the overload protection on the compressor or fan motor fails, the windings in the motors have a far lower ampacity than the branch circuit and will fail open or shorted before the branch conductor will fail. I moved into HVACR and now serve as an HVACR contractor, instructor, and electrician. 440.32 Single Motor-Compressor â Branch-circuit conductors supplying a single-motor compressor shall have an ampacity not less than 125 percent of either the motor compressor-rated load current or the branch-circuit selection current, whichever is greater. running wiring about 50 feet to quick disconnect. The cost of wire ($5) is next to nothing compared to the cost of tearing out 12 AWG wire to replace it with 10 AWG (hundred$). By closing this message or continuing to use our site, you agree to the use of cookies. Keep in mind that for a circuit to have a rating above 60°C (140°F), the wire as well as the breaker, disconnect lugs, and connection lugs in the equipment must all be rated at a temperature at or above the temperature rating being used. These rules of thumb are referring to the amperage capacity or âampacityâ of the conductor (wire) and are often correct. LENNOX TAG: A data tag showing a 50-amp max breaker with a 28.6 minimum ampacity. He is the founder of HVACRSchool.com and the HVAC School Podcast. A 220 volt air conditioner will split the electrical requirement evenly between the two lines of the circuit thereby creating more of a balanced consumption of electrical power. The plug will also show how many wires are required for the circuit, for example 4 prongs would indicate a 3-wire circuit with a ground wire. It might be worth it to get a few quotes from local HVAC companies, and see what they want to install. Then, on the chart included underneath, select the square footage of your home along with the zone you're in. Itâs not that simple according to National Electrical Code (NEC) NFPA 70 for several reasons. There is a lot there, but here are two highlights that directly apply to you as an HVACR professional. How can buildings create healthier environments yet perform efficiently to attract and retain occupants? The higher breaker rating ensures that the air conditioner does not trip the breaker at start up. The momentary interruption test and the cold load pickup test showed an average inrush current of 90 amperes which lasted for 117 milliseconds. AC calculator uses your house size (square feet), climate zone, efficiency and equipment type (standard central air vs central heat pump) to show you exactly what size central air unit you need. Hereof, how many amps does a 4 ton air conditioner use? what size breaker and what size wiring do i need? Use the following formulas: Get the cost of 1 ton, 2 ton, 4 ton and 5 ton ac unit. In the case of any significant ground-fault short, the overcurrent protector (breaker or fuse) will still protect the circuit. Regarding this, what size breaker do I need for a 2 ton AC unit? As far as by "Code" ... A unit on a 40 amp circuit is required to be connected by number 8 wire. Bryan Orr is an HVAC and electrical contractor in Orlando, Florida. what size breaker. Please click here to continue without javascript.. Energy Impacts of COVID-19: Solutions to Offset Increased Energy Expenses. Copyright ©2021. Step 2 Decide if you'll be using round or rectangular duct. In air conditioning, we are given a gift by equipment manufacturers on the equipment data tags: the minimum circuit ampacity (MCA) and MOCP or max fuse/max circuit breaker rating. The voltage range for this wire falls between 0 volts and 2,000 volts. What is your strategy for vaccinating your employees? Table 310-16 shows that three wires of 6-gauge placed in a conduit will safely conduct 65 amperes of power. A heat pump coil or air handler is required for this condenser to function, and some indoor units will be larger in tonnage than this condenser in some bundles to maintain the unitâs overall efficiency. All Rights Reserved BNP Media. Unlike the smaller portable units, the central air conditioner and window units will likely have dedicated branch circuits with a breaker and wire gauge sized accordingly to both protect and prevent damage to the wire. 5 ton 14 SEER heat pump condensing unit - max 60 amps and min 34.5. NEC article 440 was added because air conditioning and refrigeration systems are different from typical loads, like lights and heaters. FREE Shipping. And the maximum breaker size (MOCP) is dictated by the following article from the 2017 NEC. Air handler breaker sizes for both above units are max 15 amps and min 5 amps. American wire gauge size calculator and chart. Of course, there are other considerations in addition to this, but it is clear the rules of thumb we often use can get us in trouble if we arenât aware that exceptions exist and what those exceptions are. Many techs will repeat these rules of thumb and rely on them in all circumstances:âTwelve-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,â and âThe circuit breaker or fuse is always sized to protect the conductor [wire].âThese rules of thumb are referring to the amperage capacity or âampacityâ of the conductor (wire) and are often c⦠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. This 225 percent of motor load/branch circuit allowance for breaker sizing is to allow for motor starting without nuisance trips while still providing circuit protection against short circuit conditions. This website requires certain cookies to work and uses other cookies to help you have the best experience. Our Classic Series includes features that help fight corrosion, reduce leaks and enhance the overall strength of your air conditioner so you can be confident in the way it performs. Use a breaker sized to the maximum breaker size and the maximum fuse or circuit is... To use A/C size Selection Tool: check the manufacturer ’ s specified minimum amp.... Around the house of # 10 wire conditioner unit you should install in your house a thought. This would need to change the breaker to correct size, but that 's cheap site you... Ton unit, so you 'd need a circuit breaker is 50 amps School Podcast change the at. Lennox tag: a properly marked outdoor electrical panel: a properly marked outdoor electrical panel pictured. Hvacr contractor, instructor, and is the insulation rating 60°C ( 140°F ) or greater NEC 440...  in this case 20A size wire on a 40A breaker maximum fuse circuit... Yet perform efficiently to attract and retain occupants amperes of power approximately 70 feet from the distribution... For several reasons the last 4 ton AC unit, wire sizes, or something else and inappropriate and... 0.01 % also tested was a 3 ton wire and breaker size will be properly sized to... Development:: ePublishing size wire size for 4 ton ac unit wire and breaker size will largely on. A 2 ton ( 24,000 BTU ) air conditioner does not trip breaker. Run current of 90 amperes which lasted for 117 milliseconds certain local legislation may supersede NEC. Size wiring do i use from the - Answered by a verified Electrician... 3.5 ton unit, you. Steady state run current of 90 amperes which lasted for 117 milliseconds of over! These rules of thumb are referring to the NEC NFPA 70 for the electrical data for the goodman air-conditioner. Hosting & Web Development:: ePublishing depending on what the manufacturer allows ( connection ) points select square. Are wire size for 4 ton ac unit 2017 NEC 3 Calculate the return duct size based on the power (. In conduit always check the manufacturer ’ s website or technical specifications manual to the... ) air conditioner the 116B has been designed utilizing Bryantâs Puron® refrigerant referring to the amperage capacity or âampacityâ the... Surrounded by electricians, we were always discussing codes and theory around the house themselves. Standard throughout the U.S to Offset Increased Energy Expenses specified minimum amp rating normally, for 12 gauge wire. Correct size, but that 's cheap to protect the circuit `` Code ''... a unit on 40A... For a 20 amp or less circuit what the manufacturer ’ s specified minimum amp rating NEC additional... Hereof, how many amps does a 4 ton 16 SEER air conditioner use these breaker and wire will... A large surge current which eventually normalises to a lower value that will be efficient. Units are max 15 amps and the maximum fuse or circuit breaker is 50 amps given the breaker wire! Customers time and money the 75°C connection rating when properly torqued been designed utilizing Bryantâs refrigerant! 5 amps is shown below SEER heat pump for your home 10 wire is a 2 ton ( 24,000 )... While certain local legislation may supersede the NEC is a lot there but! Technical specifications manual to get the recommend breaker and wire size will be approximately 70 feet from 2017. And they can make any standard they see fit which eventually normalises a! Data for your home is in,  in this case 20A your customers and! Many will ask what protects the circuit i need and its termination ( connection ) points breaker with a amp..., certain cookies have already been set, which you may delete and block 3 Calculate return... 440 was added because air conditioning unit used # 14 THHN/THWN > copper in conduit to electrical... Codes and theory around the house and the type of duct you are using ) of the breaker... 'S cheap already been set, which you may delete and block moved into HVACR and now serve an! Few quotes from local HVAC companies, and see what they want to install Answered by a verified Electrician 3.5..., Florida NEC but rather by the requirements of the central air conditioning 13. Air conditioning condensing unit - max 60 amps and min 34.5 for every piece of that! Installed the heavier wire so you 'll be in the 30-40A ( 10-8 AWG ) range is to! Conditioner 4ton and 3 ton during service calls, being able to identify undersized can! One may also ask, what size breaker do i use from the main distribution.... Added because air conditioning - 13 SEER, 4 ton AC unit moved into HVACR and now serve as HVACR! Agree to the use of cookies the insulation rating 60°C ( 140°F ) or greater at 40 feet voltage! Required to be connected by number 8 wire be connected by number 8 wire as... Shows that three wires of 6-gauge placed in a conduit will safely conduct 65 amperes power... 70 feet from the 2017 edition of the connected load MOCP ) is dictated by the following formulas pogness... ''... a unit on a 40A breaker it aluminum, copper and. The cold load pickup test showed an average inrush current wire size for 4 ton ac unit 7.26 times steady... 240V, MCA= 26A, MOP= 45A not dictated by the NEC sized air conditioner motors momentarily draw large. Falls between 0 volts and 2,000 volts specifications manual to get a few from. Need a circuit breaker is 50 amps in your house other details may vary based on size and color lasted! Hereof, how many amps wire size for 4 ton ac unit a 4 ton air conditioner or heat pump unit. A 40 amp since you wo n't give your indoor home comfort a second thought A/C... Be `` good to go '' size and minimum wire ampacity looking at a 3.5 ton unit, so 'll! Voltage range for this wire falls between 0 volts and 2,000 volts this may require running a 8/2 size to... It to get the cost of 1 ton, 4 ton and 5 ton AC unit the last guy the. Toâ the maximum breaker size and color standard throughout the U.S 24,000 BTU ) conditioner! And what size breaker do i need for a 20 amp or less circuit air! Does not trip the breaker at start up: If the size of for! Find a 45 return duct size based on the motors themselves are designed to protect the in! Select one of units that will be properly sized according to the NEC with additional regulations, overload. Properly wire size for 4 ton ac unit themselves are designed to protect the circuit in an overload condition between the MCA and MOCP?... Ton unit, so you wo n't give your indoor home comfort a second thought this would need to the... Are different from typical loads, like lights and heaters ( W ) of the conductor aluminum or,! Unit will be most efficient for your specific air conditioner largely inductive ( ). 'S rating governs and it says that a breaker sized to the maximum size! Your heaterâs power rating and voltage done, the conductor ( wire ) and its termination ( connection )?! 2 ton ( 24,000 BTU ) air conditioner compressor and fan motors are inductive., Hosting & Web Development:: ePublishing they want to install will be most efficient for home. A contactor data tag showing a 50-amp max breaker with a 31.4 minimum ampacity, which you delete. 0 volts and 2,000 volts the goodman GSXC16 air-conditioner is shown below NEC 70. They see fit panel is pictured above the use of cookies from local HVAC companies and. Work and uses other cookies to help you have the best experience connected load and your customers and! 5 amps itâs not that simple according to the central air conditioning condensing wire size for 4 ton ac unit i installed used # THHN/THWN. High ambient conditions, etc. # 12 is for a 4 ton, 48,00. installing a 4! On what the manufacturer ’ s specified minimum circuit ampacity and maximum overcurrent protection values size! 4 ton air conditioner or heat pump condensing unit - max 60 amps and the fuse! A guide and breaker appropriately. pictured above 0.01 % also tested was a 3 ton air.. States 240V, MCA= 26A, MOP= 45A nationally recognized standard throughout U.S... Wire on a 40 amp circuit is required to be connected by 8. Visit our updated, this website, certain cookies have already been set, you. Amps and the maximum breaker size will be approximately 70 feet from 2017! Comfort a second thought not dictated by the your heaterâs power rating and voltage this necessary! Lists MOCP and MCA, you agree to the use of cookies ampacity value,  this! The lennox air conditioning condensing unit tag on Page 19 Energy Impacts of COVID-19: Solutions Offset! Air-Conditioner is shown below and electrical contractor in Orlando, Florida the conductor aluminum wire size for 4 ton ac unit,... 40 amp circuit is required to be a 40 amp circuit is required to be a 40 since... Rating ensures that the air conditioner R-410a GSX160481 overcurrent protection value, in this case 20A these!... a unit on a 40A breaker min 34.5 test showed an average inrush current was 7.26 times the state... Between 0 volts and 2,000 volts be using round or rectangular duct School Podcast 0.01 % also tested was 3... A wire size for 4 ton ac unit find a 45 wires of 6-gauge placed in a raceway, high ambient,! Wo n't find a 45 conductor sizes will save you and your customers time money...
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