Air handler wire size. 6 amps, which is 52 amps.

Air handler wire size Supply air ductwork must remain the size of the supply opening for the first 12 in. What size wire do I need for a 2 ton AC? 2 tons of cooling is about 7kW (ignoring efficiency losses, the fan load, controls load, etc. 5 For a 20-amp window air conditioner, 12-gauge wire is typically used; for a 30-amp window air conditioner, 10-gauge wire is used. 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. What Wire Size is Needed for a 60-Amp Breaker? You might wonder about calculating wire size, especially if you want to add more circuits to your home. One of the most important factors to consider when choosing the wire for your air handler is its gauge. 057 0. The installation of the air handler, field wiring, warm air ducts, etc. 4 different Electrical contractors / electricians are suggesting 4 different Breaker, Disconnect and wire sizes. 11 AWUF/AWUT Series. Nordyne Air First time, figuring it out as I go. You would need a wire that can handle 16 amps (due to When wiring a 60-amp 220v breaker, licensed electricians often use a 4 AWG wire size gauge for extra security, but a 6 AWG wire can handle the load. ; We compare 2. P. 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 Bosch BVA 2. The first time you’re called upon to size a conductor and overcurrent device for c To determine the right circuit breaker size for an air conditioner, we look at both the minimum and maximum size allowable. The AC Outlet This BTU TON Size chart can be used to size your indoor or outdoor unit. I will be putting in the actual pump and handler later but I need to finish wiring this weekend because some of the floor and wall in the main unit are open and I need to close them, before closing I need to run the wire. What is the correct size breaker for the tons of my heat pump or air conditioner condenser? Wednesday, October 14, 2020 The right breaker size for a condenser is approximately twice the RLA ( R ated L oad A mperage, which is the amperage it draws while running and after the start-up surge). 6 Accessories . 7. The direct drive motors provides a selection of air volume to match any application. above and keep the wire with the largest gauge. 5 and 4 ton air handlers = either two 40 gallon wa- Wiring Diagrams . These versatile units are applicable to air conditioning and heat Convertible Air Handlers 1–1/2 — 5 Ton TEM4A0B18S21SB TEM4A0B24S21SB TEM4A0B30S31SB TEM4A0B36S31SB TEM4A0C37S31SB TEM4A0C42S41SB TEM4A0C48S41SB TEM4A0C60S51SB The TEM4 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. Since the breakers are built in, you don't need any disconnects. APPLICATIONS 5 4. AIR DISTRIBUTION DUCTS All duct work must be installed in accordance with National Fire Protection Association Codes 90A and 90B. Electric Air Handler Wiring Diagram Source: www. 2. Here is a comprehensive guide to help you wire your Rheem air handler: Improper wire sizing: Using the wrong wire size can lead to overheating and electrical problems. The circuit breaker for the air handler was rated at 45 amps. 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. Wire good for 3 amps more Nobody makes a 55 amp breaker, so you move up to 60 . If you're running cable for both, you'll probably want to run one Whether you use a 1. com SS-AAWUF Nomenclature A W U F 18 05 1 6 ** Brand Engineering * A Single-piece Major/ Minor Revisions Air Handler * Not used for inventory management Unit Application Refrigerant Charge C Ceiling Mount PSC Motor 6 = R-410A or R-22* W Wall Mount PSC Motor Cabinet Finish Electrical The circuit breakers or fuses are matched to the wire size used for that circuit; if the load on the circuit is more than the wires can handle, the circuit breaker or fuse opens the circuit. 080 Blower MRCool 24k BTU breaker size, wire gauge and disconnect box. Furthermore, it includes a thermostat, a condenser, and an air handler with a heat source. For many years a "standard" air handler had a 9. This is because the AC requires around 15-16 amps of current, and a 4 mm² wire can safely handle this load without overheating. of overcurrent protection and supply wire sizes. Bosch BVA Series Air Handler 2-3-4-5 Ton Capacity R410A Installation Instructions. August 2015 22-1907-1B-EN ConvertibleAirHandlers 1–1/2—5Ton TEM6A0B24H21S TEM6A0B30H21S TEM6A0C36H31S TEM6A0C42H41S TEM6A0D48H41S TEM6A0D60H51S The TEM6 series air handler is designed for installation in a closet, 24V power supply sufficient for powering both air handlers. Amperes - Enter the maximum current in amps that will flow through the circuit. Single-phase voltages are usually 115V or 120V, while three-phase voltages are typically 208V, 230V or 480V. The thermostat used must be configured to bring fan pipe size to match the piping of the air handler or coil. It is essential to know how many breakers you will need for a split heat pump or central AC in the first place. 3-Speed motors provide selections of air flow to meet desired applications. AIR FILTER (not factory-installed) 11 MODEL SIZE Dimensions inch [mm] SUPPLY DUCT "A" A 14/4 stranded cable provides two 14-gauge conductor wires for power, one communication wire and one ground wire. Location Motors and air conditioning equipment don't follow the same general rules as most other applications when it comes to overcurrent protection, you can possibly find situations at times where a We would like to show you a description here but the site won’t allow us. 2 www. Low Voltage Wiring Note: *See #3 above. Here is a step-by-step guide to help you wire an air handler: Step 1: Gather the necessary tools and materials 440. if installing this option, the only heat kits that can be used are the hkr series as indicated below: note: the amana® brand ehk, ecb, edb, and edk kits are not approved for use with these air handlers. before transition to the correct duct size. it Electric Air Handler Wiring Diagram Source: i. 5-ton or 5-ton air conditioner unit, if you cannot pick the appropriate wire size for your AC, you’ll end up with a fried air conditioner circuit board. O. Once the heat kit is securely mounted, refer to the wiring diagram on the electrical box and the electrical information contained within the air handler installation manual for the proper wiring instructions and procedures. We assume that: load_current = fuse_size/1. Name Plate info: When it comes to wiring air conditioners, choosing the right wire size is crucial. Romex is used in this system bec I am replacing a propane furnace with a Rheem Air Handler and 15kw heater kit. Ask Question Asked 1 year, 11 months ago. I've got a Trane air handler circa 1995 in my basement that is about to be replaced. All but the smallest window air conditioners operate at 240 volts. imemagneti. The receptacle shall be located on the same level and within 7. To know the suitable wire size for your air conditioning unit, look into the wire sizing chart. The electrical wiring to this unit is simple if you know how. • Heat pump kit - for all HX models with electric heat (#942-1) (field installed) • Factory or field installed R410 TXV (non-bleed type) MODEL SIZE (BTU) MODEL (PISTON) MODEL (R410 TXV) MODEL (PISTON) MODEL (R410 TXV) FIRST CO. 5 ton air conditioner, a 4 mm² wire is typically recommended. He installed a single feed kit that serves the (2) 60a disconnects in the unit. Concerns: 1) the single feed kit is labeled for use only up to 100a, 2) the air handler is labeled for use only with copper wire. and 3. The air handler is not to be used for temporary heating of buildings or structures under construction. C. The size of wire you need for a Goodman air handler will depend on the length of the run and the amperage of the air handler. So, I’ll teach you everything you need to know in this One of the most commonly misunderstood issues in your electrical system is what size wire and circuit breaker you need for your central air conditioner or heat pump. 6 amps, which is 52 amps. The unit rating plate displays the air handler model number. 5. I Show each Con 2. 0 Series Air Handler 2-3-4-5 Ton Capacity R410A ² Wire size should be determined in accordance with National Electrical Codes; extensive wire runs will require larger wire sizes. com Electric Air Handler Wiring Diagram Source: coastaldiagram. Always install the air handler to operate within the air handler’s intended maximum outlet air temperature. com Electric Air Handler Wiring Diagram Source: static-cdn. DUCTWORK 10 7. Step-by-Step Guide to Wiring an Air Handler. 63 states, "A 125-volt, single phase 15- or 20- ampere -rated receptacle outlet shall be installed at an accessible location for the servicing or heating, air conditioning, and refrigeration equipment. These versatile units are Load Wire Fuse Size Size Ampacity Size Ckt1 Ckt2 Ckt3 Ckt1 Ckt2 Ckt3 VAC Circuits Amps Ampacity Size AWG MM2 01 1 - - 5. 9 30 30 10 5. It is not uncommon for our customer service associates to get a phone call or email when an installer or designer reads the recommended wire size listed for our air compressors in the installation manual. Figure 1. this air handler does not have factory installed electric heat. 1 5* 1 1 12. The air We would like to show you a description here but the site won’t allow us. 24,000 BTU Air Conditioner Breaker Size (2-Ton Units) 24,000 BTU air conditioners can draw anywhere from 2,000W to 2,800W of electric power when running at 100% output. SAFETY 2 2. Modified 8 months ago. 1/4 inch bleed for air venting. Staff member. Convertible Air Handlers 1–1/2 — 5 Ton TEM6A0B24H21SB TEM6A0B30H21SB TEM6A0C36H31SB TEM6A0C42H41SB TEM6A0C48H41SB TEM6A0D48H41SB TEM6A0C60H51SB TEM6A0D60H51SB The TEM6 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. For a run of less than 50 feet, you can use 14-gauge wire. T. ³ Must use time-delay fuses or HACR-type circuit breakers of the same size as noted. Multi-speed Air Handler with PSC Motor 1½ to 5 Tons Product Features • Check flowrator for cooling and heat pump applications Piston Size 0. 5 next larger size is 30 amp breaker. texie Senior Member. 10 gauge whip off disconnect box fed from 12/3 on 15 amp breaker for Mini Split? 0. Minimum circuit All JCI Unitary Products air handlers and coils can use a TXV to provide our customers with the optimum performance and refrigerant control. For motors, it is recommended to multiply the nameplate FLA by 1. For the smaller 3-zone outdoor MrCool DIY unit (DIY-MULTI3-18HP230), you will need a 35A maximum breaker. 6A, with a maximum breaker size allowed of 45A, can I run a 10/2 wg NM-B and install a 45A breaker. The unit dimensions for the supply air plenum are provided in Convertible Air Handlers 1–1/2 — 5 Ton TEM4A0B18S21SB TEM4A0B24S21SB TEM4A0B30S31SB TEM4A0B36S31SB TEM4A0C37S31SB TEM4A0C42S41SB TEM4A0C48S41SB TEM4A0C60S51SB The TEM4 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. 75-ton to 6-ton AC units, minimum ampacity, and the corresponding AC wire sizes you can use to wire an air conditioner. com. Ducts should be adequately insulated to prevent Installer’s Guide - Trane Technologies The air handler is a 4 ton unit and is listed at 240v and 80 amps. Connecting you to more Wiring a Rheem air handler may seem like a complex task, but by following a step-by-step process, you can ensure a successful installation. 9. Convertible Air Handlers 1–1/2 — 5 Ton TEM6A0B24H21S TEM6A0B30H21S TEM6A0C36H31S TEM6A0C42H41S TEM6A0C48H41S TEM6A0D48H41S TEM6A0C60H51S TEM6A0D60H51S The TEM6 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. 5 m (25ft) of the heating, air-conditioning, and refrigeration equipment. Of course, read the label and identified that there are (2) 240v circuits required. A regular heat pump requires two dedicated branch circuits: the condensing or AC unit and the air handler. The gauge determines the wire’s thickness and, subsequently, its capacity to carry electrical current. Transformers are a perfect example; wires going into the transformer are small, and wires leading out of the transformer are larger. com 3 Single-­‐Piece Air Handler Major/ Minor Revisions *Not used for inventory management Unit Application C -­‐ Ceiling Mount PSC Motor Refrigerant 6 = R-­‐410A Piston Size ² 0. must conform to the requirements of the National Electrical Code, ANSI/NFPA No. GENERAL 3 3. 70 (latest edition) in the United States, The correct orifice size may be contained in the replacement orifice package located inside the control box of the outdoor series heat kit. Reactions: CustomElectricLLC, Dsg319, xformer and 2 others. The maximum size will be clearly labeled on the compressor label. LearnMetrics. Wiring an air handler is a crucial step in the installation process of an HVAC system. Low voltage wiring should be connected as shown in Figure 1. 076 0. stack. As a general rule, the Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire. 015 14 2. Can I use 2 40 amp breakers with #6 wire instead of one 80 amp on a #4 wire. E. Heat (kW) In this HVAC Video, I Explain How a Heat Pump and Air Handler are Wired and Controlled with a 24-volt Thermostat and Low Voltage Power Wires. Elec. You also size circuit breakers, fuses, or overcurrent protectors to protect the conductor. 110V Mini Split: Breaker Size This Air Handler provides the flexibility for installation in any upflow or downflow horizontal application. cloud This Air Handler provides the flexibility for installation in any upflow or downflow horizontal application. You can use a 60 amp breaker on such a wire, since it is the next higher rated overcurrent device. In the example below, it’s 60 amps. And to determine what size wire for 12000 BTU mini split? The chart tells you that you should use 12 gauge wire. The air handler is a Ameristar Model M4AH3036B1000AA Heater kit is a Warren Tech Model # WHE1502BX (Product # MAYHTR1A15BKRA) Re: Sizing Breaker for Air Handling Unit Air Handling Unit has a supply & a return fan. Top and side power and control wiring, accessible screw 8. All I have left for the electrical to figure out is what size wire I need for the air handler. 6 FLA), so breaker size for both: 11 x 2. 7241×10-8 Ω·m × 100 m × 30 A / 10 V × 210. The Quantum Series Title: Installers Guide 1-1/2 - 5 Ton Convertible Air Handlers TAM4A Models Author: tylp Created Date: 12/11/2015 3:02:47 PM Hi, Looking for validation or correction on my understanding of requirements for wiring 5 ton Trane air handler with 20kw heat strips. . 1. Between them is a line set, aka lineset, which includes two insulated copper tubes through which the refrigerant flows. How do i wire two breakers that are at the air handler, Brian HVAC Guy | I have been an HVAC/R mechanic/technician for 30+ years. Given that information, the main power panel has two separate breakers for the air handler See more Identify the Load (Ampere) The first step to calculating wire size is to identify the load in Air Conditioner Wire Size Calculator. rgf. ; We find a wire gauge for which the ampacity is higher than the fuse size. Y R C Outdoor Unit For example, let’s calculate the wire size of a 100-meter-long copper wire for a single-phase circuit when it must supply 30 amps of current with a 10 V voltage drop allowed: A (mm²) = 2 × 1. Jump to Latest 4. Every 240-volt appliance runs on a dedicated circuit, To determine the right wire size for a 220 air conditioner, you need to consider the voltage, the distance from the electrical panel to the air conditioner, and the current (in amps) that the air conditioner requires. These Btu rated, AHRI-certified units utilize inverter technology and variable speed DC inverter operation mode for optimal efficiency and quiet operation. 3. amana-hac. I mentioned that the minimum wire size for this air conditioner would have to be 8-gauge, and a 60-amp circuit What size wire for 230 volt air conditioner? The correct wire size for any central air conditioner is not determined by voltages, but by the cooling capacity of the system. Experience superior comfort and energy savings with a ductless mini split system, featuring industry-leading technology. The return and supply duct may be fastened to the bottom or sides of the air handler using screws no longer than 1/2 in. In this post I’ll explain the issue. imageservice. 1,948 Satisfied Customers. Grounded and all wiring to conform to I. 065 0. 3 10* 1 1 25. 8 . Stage Backup Heat Control Wiring Standard Air Handler Wire Size: 18 Gauge Standard Single Stage Heat Thermostat Standard A/C Condenser AC Contactor 24 Volt+ Fan Only Operation Common Air Conditioning 1st Stage Heat (White) 2nd Stage Heat Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire. 25 (it is generally accepted that a fuse must be at minimum 125% the size of the load current); Using load_current and length, we compute the wire gauge that meets the chosen voltage drop. Single piece air handlers are available with “Flex-coils” (without a factory installed metering device). electric heat is available as an accessory. All air handlers operate on 115 volt - 1phase - 60 cycle line voltage and 24 volt control. Tags 1. The most common central air conditioner wire size is either 14 or 12 gauge, but the The air handler will likely only require a 120V 15-20A circuit, whereas the condensing unit will require 240V 20-50A circuit. 6 / 17. I will say that you must have a wire with an ampacity of at least 52. REFRIGERANT CONNECTIONS 10 8. 8 * Complete warranty details available from your local dealer or at www. For example, if you have a 3 ton AC unit that has a minimum of 40 amps, you only need an eight-gauge wire. 7 57 60 6 13. Once the heat kit has been properly wired, reinstall the electrical box back to its original 🔥ATTENTION HOMEOWNERS🔥 - Ever wondered how to keep your HVAC unit in peak condition? Whether you're fighting the freezing cold or scorching heat, we've got ENHANCED AIR HANDLER MAHM*ETA Page 2 MODEL NUMBER GUIDE 2ND GENERATION METERING DEVICE O = ORIFICE T = TXV C = CAPILLARY P = PISTON MOTOR C = PSC E= ECM COMPANY M= MR COOL PRODUCT TYPE AH= AIR HANDLER AIR FLOW BTU 24, 30, 36, 42, 48, 60 M AH M 024 E T A PHYSICAL Model Volts/Hz/Phase Max. 4(B) Air-Conditioning, Circuit Sizing – https://www. 3 MODEL KEY: Air Handler MODEL KEY: Electric Heat Assembly Instead, amperage dictates the size of the wire. What size amp breaker and wire. According to the actual connection of low-voltage switch or short wiring. Since the air conditioner draws only 1550VA and the stablizer is rated for 4000VA, the air conditioner is well within the capacity of the voltage – No, we aren’t kidding you might need a 2 gauge wire. For added flexibility, an R-22 or R-410A TXV or piston must be field For a 1. 5 = 27. Example: supply fan is 7-1/2 hp (11 FLA, 480V), return fan is 5hp (7. Table 310-16 shows that three wires of 6-gauge placed in a conduit will safely conduct 65 amperes of power. Low voltage electrical knockouts are Trane Technologies The breaker and wire sizes for the outdoor compressor and and indoor air handler are listed in the Mitsubishi installation instructions (40A #8/2). 5 and 3 ton air handlers = minimum 50 gallon 3. 62(A). imgur. 051 0. com/code. BOX 270969 - DALLAS, TEXAS 75227 Voltage - Enter the voltage at the source of the circuit. But neither the installation instructions nor the submittals specify the breaker or wire size for the 15kW backup heat unit. com SS-GACNF SS-GACNF www. first, size breaker for largest motor, then add the rest, NEC 430. The direct drive motors provide a selection of air volume to match any application. 1st August 2024 at 9:08 am Hi Gary, 20A amp breaker is pretty much a default setting. This diagram is to be used as reference for the low voltage control wiring of your heating and AC I need help with the wiring of an AC unit. Air Conditioner Wire Size Chart. ). air handler wire size. ELECTRICAL WIRING 7 5. 25 for wire sizing. This air handler has an electric heat kit with it. 5 T Lennox heat pump to go with a commensurate air handler. These versatile units are applicable to air conditioning and heat pump We would like to show you a description here but the site won’t allow us. The question usually sounds like this: air filter 23 combustion air 24 gas piping & connection 24-25 leak testing 25 electrical 26 controls 27-31 heating operations 32-35 cooling operations 35 location of major components 36-37 wiring diagrams 38-41 circuit diagrams 42 startup instructions 42-43 troubleshooting 44-47 heating 44-46 cooling 47 maintenance & service 47-52 heating 47-50 This is a "continuous load" so the wires must have an ampacity of 125% of 41. 110V Mini Split Breaker Size. MikeHolt. You just input the AC capacity (tonnage) and the circuit voltage (Example: 220V), and the calculator outputs the minimum wire ampacity you need. It involves connecting the various electrical components of the air handler to ensure proper functionality. ume sizing guide is satisfactory in most parts of the country: (minimum requirements) 1. It plays a crucial role in maintaining a comfortable indoor Convertible Air Handlers 2 — 5 Ton TEM6A0B24H21S TEM6A0B30H21S TEM6A0C36H31S TEM6A0C42H41S TEM6A0C48H41S TEM6A0D48H41S TEM6A0C60H51S TEM6A0D60H51S The TEM6 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. The evaporator or air handler is the indoor unit. I always thought you choose the wire size by the mca of the unit and then use the max breaker size. 9K views 7 replies 4 participants last post by chemman Oct 23, 2014. The manual says it needs a single circuit 80 amp breaker to split to 2 breakers in the unit with a jumper kit. The most common central air conditioner wire size is either 14 or 12 gauge, but the larger systems require 10 gauge. Moreover, the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the Wiring Diagram . This is a chart with pre-calculated wattages for 0. Replacement wire must be the same gauge and insulation type as original wire. 4. 6. Therefore, we use ampacity (amp capacity) to determine the size of a wire. These versatile units are applicable to air If I have an air handler that has a minimum current requirement of 31. Air Conditioner Wire Size Calculator (+ Chart For 1. 080 0. In an HVAC system, the air handler is responsible for circulating and conditioning the air in a building. Using the correct wire size is Wiring Diagram . Convertible Air Handlers 1–1/2 — 5 Ton TEM4A0B18S21SA TEM4A0B24S21SA TEM4A0B30S31SA TEM4A0C36S41SA TEM4A0C42S41SA TEM4A0C48S41SA TEM4A0C60S51SA The TEM4 series air handler is designed for installation in a closet, utility room, alcove, basement, crawlspace or attic. The heater I have has a 60 amp breaker included with it. These versatile units are We would like to show you a description here but the site won’t allow us. C. 5-5 Ton AC Units) 9 Best Window AC Units In 2025 (10 . Hvac Air Handler Wiring. franklinhvacsystems. 6 kw heat strip and a single speed blower and a MCA slightly less than 55 amps this allowing a #6 NM so that became the "norm". These versatile units are Wire size for 1. Featured mini split wire: Indoor unit – Wall-mounted air handler. Check out this video by Structure Tech Home Inspections. Why would an air conditioning unit specify a maximum breaker size? 0. Before you check the calculator and the chart, however, it’s quite useful to look at what the air conditioner wire size calculation looks You don’t have to be an electrician to wire an air conditioning unit, but a good understanding of home wiring practices helps. I don't have my book handy, so I don't know if a #8 will suffice. The ground wire is essential for safe operation, preventing damage to the air conditioner and protecting your family, which is why going with 14/4 is always better than 14/3. chemman Discussion starter. 072 0. Use a 15A breaker with 14AWG wire (/3 W/G unless you don't need a service outlet at the disconnect) The rule for an air conditioner is that you need to use wire that's fat enough to handle the unit's maximum operating current (as given by the Minimum Circuit Ampacity), and you cannot use a breaker larger than the Maximum Overcurrent Protection Device (Max. To make matters worse, the A simple install wiring video of a 1ph 250v 15 amp air handler. 1 41. However, understanding the differences between these wire types and their applications is essential for making an informed decision. goodmanmfg. The label on the air handler has a list of heater kit models but doesn't list the one I have. This article will explore the distinctions, factors affecting wire On an inspection yesterday on a home built in 2004, the label on the air handler indicated that it needed a minimum ampacity of 59 amps. Reactions: stickboy1375. AIRFLOW PERFORMANCE 9 6. It is essential to use the Use the nameplate data from step 1 above to find the correct size wire to conduct power to the central air conditioning unit. The units should install the stated-cross-section ground wire and keep it grounding properly and reliably. ActionDave Chief Moderator. Check the name plate, it will tell you minimum wire size. 209 posts · Joined 2012 Add to quote; Only show this user #1 · Oct 22, 2014. 051 What Is the Right Wire Size for My Air Conditioner. 6 / 34. In the case of 10/2 or 10/3 wire for air conditioners, the better choice is 10/2 wire. Find the wire size you need on the charts above. Supply and return duct system must be adequately sized to meet the system’s air requirements and static pressure capabilities. On average, at a 10 EER rating, they require 2,400 watts to run. Whether you are a homeowner or an HVAC technician, understanding air handler wiring can help you troubleshoot issues and maintain your HVAC system. You can use a wire size calculator or consult with a professional electrician to ensure you have the correct wire size. Also allows for ducted return air. Reply. 5 and 2 ton air handlers = minimum 40 gallon 2. For a run of more than 50 feet, you will need to use 12-gauge wire. 1 20. 5 T heat pump. Based on this, you can choose the correct AWG The correct wire size for any central air conditioner is not determined by voltages, but by the cooling capacity of the system. I therefore would like to have new wiring run to the heater. Table of Contents 1. cxjhs bhyoem pcjej nwhs hwoob vqvoaatkd fhwskzie ghhwes nmkk bzpxjbo wepi ymzj cfnehct qbmpkr ttyhdn