heat pump circuit breaker size

I recently upgraded my furnace / a/c unit to a heat pump. The recommended size of circuit breaker should be. In other words, same rule won’t apply to the different types of loads i.e. Thanks very much for the Lesson…can you send to me through my emails, please? 15A, 120V can’t be used on 20A, 120V circuit. Thanks for explanation. If your heat pump tripped your circuit breaker, be happy. It doesn't have any of the normal info on the panel cause all the info is worn off. This tells us what minimum wire gauge we need, which is #12 wire. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. What is the appropriate size of circuit breaker for 2000W, single phase 120V Supply? The general rule of thumb is that circuit breaker size should be 125% of the ampacity of cable and wire or the circuit which has to be protected by the CB. Look at the amperage rating on the unit. To find the breaker size for three phase supply voltage, we must know the exact kind of load as there are many factors affecting the load current. Damage to the condenser unit, and possibly a fire, are the implications. Why do so many people get mixed up on this? CB size should be 125% of the circuit current. Get Free Android App | Download Electrical Technology App Now! Is it an electrician’s responsibility to make sure the service to the home can handle a new device they install? In other words, a load circuit having 24A, the appropriate size of breaker would be: Example 1: CB Size for 30A Non-contentious Load, Example 2: CB Size for 28A Contentious Load, Example 3: CB Size for 30A Non-contentious Load & 28A contentious Load, Related Post: Difference Between Relay and Circuit Breaker. 37. It seems to be a nuisance trip on occasion, and it usually happens at the most inopportune time. Bad wiring If everything in the heat pump checks out (it’s not actually pulling more electricity than it should) and the breaker … Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. 430-152 Motors Hermetically Sealed*, Air conditioners And heat pumps. An undersized breaker or same rating with load current breaker can trip and reset the circuit again and again. A retired electrician friend of mine was looking at it all after installation and said that the info. Circuit Breaker Size To determine the right circuit breaker size for an air conditioner, we look at both the minimum and maximum size allowable. Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? Our 20th year anniversary is May 21, 2020. Simply, Multiply 1.2 or 1.25 to the load current. The maximum size … Let’s Not Get Trippy. In case of other (over or lower) size instead of correct sized circuit breaker, the circuit, cables and wire even the connected device may heat up or in case of short circuit, it may start to smoke and burn. I am astonished to get so many quick replies to my question--thank you, all. residential wiring and industrial or commercial installation to prevent the electrocution, hazardous fire and protection of the connected electrical equipment and appliances. I don't know which backup heat you have, but looking at the Trane literature I have, the 10 KW I have says it needs a 60A breaker and #4 wiring. That typically determines the limitations of the circuit. Breaker Size Calculator with Solved Examples. NEC 240 first sections have requirements for max OCPD based on wire gauge up to #12. The installer, a Rheem authorized installation company, moved the location of the hp and the disconnect box. What is the suitable size of circuit breaker for 230V, 1840kW load single phase circuit? The following two charts shows the suitable circuit breaker sizes with wire gauge and different level of voltages. Please post on ckt breaker maintenance Thank you. Your email address will not be published. I will have a 2HP Dust Collection system on a dedicated circuit, lighting on a dedicated circuit, and two 20 amp receptacle circuits for now. This way, a 30A circuit can be safely used for 24A circuit. Circuit Breaker Size. How to Find the Size of Earth Conductor, Earthing Lead & Earth Electrodes? I know by math the are both around 21 amps. Replacing Breaker for air conditioning or heat pump air handler - YouTube David, discusses replacing a breaker, wire size #6 copper: 10kw heat strip, 60 amp breaker. It is not correct that a 30A circuit breaker will trip at 30A. If we use a 100A circuit breaker for 30A circuit, it wont protect the circuit from fault currents and may burn and damage the device as more than 30 amperes current won’t trip the circuit breaker. If it says 25 min then it will be 25 minimum or it will not pass the inspection. This will determine wire size and transformer size. The general rule of thumb is that circuit breaker size should be 125% of the ampacity of cable and wire or the circuit which has to be protected by the CB. Air Conditioning / Heat Pump tripping the breaker. Thank You. 4 Answers. So for this piece of equipment we could have 12 gauge wires being protected by 35 amp breaker and it is correct. It makes life so much easier. 30A Breaker and 10 gauge wire can be used on 240V AC Supply. Below is the given chart showing the % of max current rating of breaker size for different types of load currents. How to Calculate the Battery Charging Time & Battery Charging Current – Example, Automatic UPS / Inverter Wiring & Connection Diagram to the Home, How To Calculate Your Electricity Bill. In short, we must use the proper size of circuit breaker according to the device i.e. It is protecting the equipment, the wiring, and the house. printed on the hp called for 25 amp minimum, but that my heat pump was connected to a 20 amp breaker (using the existing 12-gauge wire). Example 2: Find the appropriate size of CB for 3-Phase 415V, 17kW load? Control (make or break) a circuit manually or by remote control under normal and fault conditions. A circuit breaker is a switching as well as protection device used for ON/OFF operation of the circuit as well as prevent the electric shock. Archived. By multiplying the volts by amps you will receive total wattage. Breaker is tripping when ac is activated. The main thing is to keep the main thing the main thing! That’s why we must select 20-25% higher size of current for circuit breaker than the flowing current in the cables and wires to the connected device. Though it might be frustrating, remember your circuit breaker is there to protect you. It is about a 2 - 2 1/2 ton unit. Heat-tracing panel with circuit breakers (HTPG or HTPI) Contactor or local thermostat 480, 600, 1K, 10K Vac Heating circuit Motor Control Center Fig.1 Typical heat-tracing power distribution system Heat-Trace Panels — Group Control RAYCHEM HTPG The HTPG is a dedicated power distribution, control, ground-fault protection, monitoring, and alarm panel. In normal conditions when the circuit current rating is lower than the circuit breaker rating, the circuit operation is normal and it can be changed by manual operation. EE-Tools, Instruments, Devices, Components & Measurements, How to Find The Suitable Size of Cable & Wire ? ), Please forward me all this information if it is free. As circuit breakers (CBs) and Overcurrent Protection Devices (OCPD) are designed for 100% rated current i.e. To determine the appropriate size of circuit breaker for single phase supply, it depends on multiple factors like type of load, cable material and environment temperature etc. The wire is sized for the "MCA, minimum circuit amps" on the nameplate. The following circuit breaker sizing calculator will show the difference in % to the load, voltage level in different countries and exact size of breaker in amperes. For example, a 30 amp circuit breaker will trip at 30 amp no matter if is it continuous or non continuous load. Some circuit breaker problems can be quite serious. The manufacturers specs and installation info over ride code. 120V can’t be used on 240V circuit and vice versa. Our photograph of a modern circuit breaker panel (left) shows where your search for the air conditioning or heat pump system main circuit breakers would typically begin. According to NEC (National Electric Code), IEC (International Electrotechnical Commission) and IEEE (Institute of Electrical and Electronics Engineers), a proper size of circuit breaker is must for all electrical circuits i.e. Lv 7. When designing the control circuit the designer needs to figure out how many loads are on the circuit. Required by the National Electric Code (NEC) standards for pool pumps, these GFCI breakers are the right choice in load centers supporting IntelliTouch® and EasyTouch® Control Systems. A 3-Poles circuit breaker can be used on 1-Phase system only and only if indicated by the markings or instructed by user manual. If the breaker trips a second time, then you should schedule a service call. The maximum fuse size is usually on the data plate. My wife had it checked out & cleaned a couple days ago. The manual says it needs a single circuit 80 amp breaker to split to 2 breakers in the unit with a jumper kit. BuzzHazzard - Visiting Guest. Close. The installer, a Rheem authorized installation company, moved the location of the hp and the disconnect box. Keep in mind that the breaker size should not increase the max amperage rating of cable and wire. CB used for protection of electrical equipment& machines. The breaker is whatever the "max oc protection" on the nameplate. If you are replacing an existing heat pump system simply locate your main breaker panel and identify the heating breaker. Dear Owner, My name is Darrel Wolf with Pro Interior Designers LLC. RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. I may want to expand to a 240V circuit for a 3HP table saw at some point as well, and perhaps add an air compressor. I'm installing a used air handler/heat pump in a rental house. Good to know: For the same load, the breaker size in three phase is less than the breaker size used in single phase AC circuits. 6 years college. To determine the appropriate size of circuit breaker for single phase supply, it depends on multiple factors like type of load, cable material and environment temperature etc. In addition, A Circuit breaker rated for: Related Post: How to Find Voltage & Ampere Rating of Switch, Plug, Outlet & Receptacle. Yes... we are 20 years old. The fuse or breaker must be the right size to adequately protect the heat pump and its wiring. Resistive Loads, Heat, Stoves, Toasters, Water Heater etc. When your heat pump trips your circuit breaker, it indicates there’s something wrong. Breaker Calculator & Examples, How to Calculate the Circuit Breaker Size? An exact 100% rated for 30A circuit breaker can be used for 30A non-continuous load. Thanks. On the other hand, they should have looked at your electrical service and told you if you needed something done there. Last night, it became warmer in the house than normal. Add all three to Cart Add all three to List. Disconnect Size. We also include bringing the disconnect, whip and breaker up to code in the price. Because this is HVAC equipment, a 14 AWG circuit and 15A breaker is insufficiently sized. Heat Pump Breaker Trips - Richard, my breaker keeps tripping for my heat pump. Lets find the correct size of circuit breaker for three phase circuits as follow. Ask Our Pros-Owner Assistance - NO DIY advice will be given. Answer Save. The #1 question asked by NEW MEMBERS. A single phase circuit breaker can’t be used for three phase supply voltage levels. * Motors except Hermetically Sealed 00-250% NEC. Circuit breaker wiring diagrams do it how to size fuses in a diy cer van cable sizing calculation wiring your boat molded case circuit breakersCircuit Protection Blue Sea SystemsPart 1 Choosing The Correct Wire Size For A Dc Circuit Blue SeaThesamba Vanagon View Topic Circuit Breaker SizesWhat Wire Size Should I Use From Sub Panel […] That’s why a correct size circuit breaker is needed for smooth operation. The maximum fuse or breaker is 35 amps. some loads are simultaneous (continuous) while other are non-simultaneous (non-continuous). This is because all loads are not same i.e. I just had a 2-ton Rheem heat pump and air handler installed, to replace a Carrier 2-ton that was not working. HVAC Technician. I’m interested in your company ordering some circuit breakers for a electrical project am working on for my client. Turn it to the "off" position if it isn't there already, then back to the "on" position. We prefer to run 10GA wire when possible. A 30 amp circuit requires a MINIMUM of #10 wire. Your email address will not be published. How to Find the Value of Burnt Resistor ( By Four Handy Methods ), Resistor Color Code Calculator – 3, 4, 5 & 6 Band Resistors Calculation, Circuit Breaker, Fuse and Protection Symbols, A Complete Guide About Solar Panel Installation. Our website is made possible by displaying online advertisements to our visitors. Posted by 2 years ago. CB current should not be lower nor highest but 125% of circuit’s current. As for the disconnect. W … read more. I have a TRANE XE1000 that periodically trips the circuit breaker sitting near the outside portion of the heat pump. I […] My boss also carries an unlimited electrical license. Very nice engineering field for polytechnic student read about electrical engineering& technology. The breaker is tripping for a reason. I don't think it's reasonable to expect the contractor to upgrade your electrical service if that's not in the contract. These items are shipped from and sold by different sellers. Air Conditioning / Heat Pump tripping the breaker. Original Post: Wire size for a 60 amp circuit. I’m wondering if anyone can help me figure out what is happening. 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Follow, © Copyright 2020, All Rights Reserved 2012-2020 by. For residential use, we may follow the same formula as above for single phase with taking the √3 (1.732) due to three phase power formula. I am wondering what you think could be the problem to prevent these nuisance trips. Inappropriate installation or servicing are the causes. Bad circuit breaker Breakers wear out over time, especially when they’ve been tripped frequently. My question is what size breaker do I need. You can see that this name plate states a minimum circuit ampacity of 20 amps. A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. Electrical or Mechanical. Components Coils, Heaters, Motors, etc. The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities; however, typically electric furnaces require a draw between 60 and 80 amps. In case of continuous load, rate of %125 is applicable. The manufacturer specs a min and max overcurrent protection for each unit, and that's what needs to go in. airheatman. Without the breaker working correctly, you could face an electrical fire or other serious damage. i have really enjoyed the lesson concerning the correct size of circuit breaker to be used for controlling electrical equipments for both domestic and industrial purposes… i will be happy if you could send me copy of the lessons through my email address provided below. Don’t leave the problem unchecked as it can eventually lead to fires and many other dangers. light, motor, inductive or capacitive load as motor takes initially very high current during the starting process as well as power factor involvement. This means your circuit breaker is doing its job and preventing a power overload in your Austin home. What is the best size of circuit breaker for that 20 A circuit? Step by Step Procedure with Calculation & Diagrams. Please consider supporting us by disabling your ad blocker. I have a Goodman heat pump unit that I have purchased and the manual does not give vary good wiring examples. A 3-Poles circuit breaker can be used on 3-Phase system using either 2 or 3 poles. How to Find the Proper Size of Circuit Breaker? For maximum safety and reliable operation of the electrical machines, it is recommended to use the correct and suitable size of circuit breaker according to the circuit’s current flowing through it. It's not reasonable for them to expect you to do understand that. Breaker cannot be larger than ampacity of wire except for some loads like more loads. I am replacing a propane furnace with a Rheem Air Handler and 15kw heater kit. All I can find is two stickers in it: 4.8 kw @ 230 & 5kw @ 230. They wouldn't put the breaker size on the unit if it didn't matter. It will not pass the mechanical inspection. The minimum rating of circuit breaker should be 8A. If it does your county has crap for inspectors or they are being paid off. 1 decade ago. The breaker trips more often during a h eating cycle rather than a cooling cycle. Favorite Answer. a 30A circuit breaker can safely carry the exact 30A current but NEC suggests 80% as a safe current limit as compared to the rated current of CBs. I actually could see the electrical inspection passing before the mechanical, because the wiring is being properly protected by the breaker. The next closest value is 30A. My 3 ton geo unit uses a 30 amp breaker. A retired electrician friend of mine was looking at it all after installation and said that the info. Now, in order to choose an electric breaker, multiply the current draw of the water heater with 125 per cent in order to determine the size of the breaker you will need. If your heat pump were to keep running without being tripped, it may cause an electrical fire! I am wiring a subpanel for a workshop. Limited Edition... Book Now Here. If it requires a certain circuit size/wiring then that must be followed. Required fields are marked *, All about Electrical & Electronics Engineering & Technology. This is a continuous load, so you're only allowed to size to 80% of the rated ampacity, and the next larger size is 12 AWG and 20A.The Max Fuse simply states that the maximum … The first item to check would be the installation instructions for the unit itself. Here is the heat pump model number:Rheem RPQL024JEZ. Can I use 2 40 amp breakers with #6 wire instead of one 80 amp on a #4 wire. 12,516 satisfied customers. I want you to get back to me how much it will cost to order the 3-Pole Circuit Breaker, 200A, T3 Type for Symmetra PX250/500kW PD3P200AT3B. Why? Look for a number where you grasp the breaker. In your case, the circuit breaker should be a 20 ampere HACR breaker. The air handler is RHKLHM2417JA. We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. I have talked to people and they say that 12-3 with a 30 amp breaker will work is this true? A Circuit breaker (CB) is a control and protection device which: A circuit breaker is used for switching mechanism and protection of the system. Use the correct size breaker. Let see the following solved examples: Suppose, a 12 gauge wire is used for 20 amperes lighting circuit having 120V single phase supply. For accurate operation an d protection, even complex designs are used with circuit breaker like, Circuit Breaker Size Calculation for Single Phase Supply, Circuit Breaker Size Calculation for Three Phase Supply, I = 6.5kW / (480V x 1.732) … (√3 = 1.732). The solved examples clear the confusing concept of sizing a circuit breaker. In case of contentious loads for three or more hours, the load current should not exceed 80% of the rated current of circuit breaker and OCPD. For accurate operation an d protection, even complex designs are used with circuit breaker like fuses, relays, switches, earthing & grounding etc. That is probably more than adequate because it also is for the vertical loop pumps in the ground. Frequently bought together + + Total price: $2,289.00. In this post, we will be going to show that how to choose a right size circuit breaker for electrical wiring installation and design with related voltage level, wattage usage and difference in % to the circuit load and current capacity of the CB. 20A max unless special cases in NEC (motor loads, HVAC etc. woodtick314. break the circuit from the main supply. Once you have determined the sizing requirements for the cooling side of your heat pump system, you then need to select the proper supplemental heating element that is included with all of our heat pumps. The specifications clearly state that it shall carry 100%of the rated current, Further, hydraulic magnetic circuit breakers carry 100% of rated current continously and comply with UL specifications. It doesn't matter what your friend "thinks". For assured peace of mind, get professional help right away. Circuit breaker keeps tripping: If the circuit breaker to your indoor or outdoor unit trips, you may reset it. The size of the circuit breaker is determined by the manufacturer, and should be listed on the nameplate. Ensure the size is correct. How to Wire a Single Element Water Heater and Thermostat? Example 1: Which size circuit breaker is needed for 6.5kW, three phase 480V load? The next closest standard of circuit breaker is 10A. There in no mention of operating time. I just had a 2-ton Rheem heat pump and air handler installed, to replace a Carrier 2-ton that was not working. This is typically done by adding up the VA or Volts-Amps ratings of all the loads in the circuit. Heat Pump Electric Circuit Electrical Question: My heat pump isn’t working right, is there a problem with the home electrical service or local utility transformer and the heat pump circuit breaker? How to Read MCB Nameplate Data Rating Printed on it? I would defenetly upgrade to the 10 gauge wire and 30 amp breaker. If your furnace is causing your circuit breaker to trip, look for the common triggers mentioned above. Break a circuit automatically under fault conditions (like over current, A circuit breaker is a switching as well as protection device used for ON/OFF operation of the circuit as well as prevent the electric shock. Participate in over 40 different forums and search/browse from nearly 3 million posts. Post photos, respond to polls and access other special features. Circuit Design, Limitations, and VA Ratings . I want it fixed so my heat pump … If the MCA is 18 amps, 12GA wire is OK. NEC rates 12GA wire up to 20 amps. If the mca is 18 and the mocp is 25, you can have 12ga wire and a 25 amp breaker. So the circuit breaker itself could be bad and needs replacing. = 125% Continuous Load + 100% Non-continuous load. In the above example, we would require a 15.6 amp circuit breaker for our US readers. Heat pumps can cause your circuit breaker to trip for a variety of reasons. 120-277 can be used for 120V, 240V and 277V. Our AC is a heat pump unit. In other words, the breaker controlling a circuit should be 125 percent of the continuous load (maximum current expected to last for three hours or more) and 100 percent of the non-continuous load (shorter bursts of power, such as that needed to start up). Show details. Pulled fuse at heat. Breaker Size Based on Wattage The size of a breaker is determined by the amp draw. 240V can be used for 120V, 240V but not for 277V (Commercial applications). An over sized breaker used for protection can damage the water heater or other connected appliances even leads to the fire due to overheat. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! – Examples in British and SI System, Standard Wire Gauge “SWG” Calculator – SWG Size Chart & Table. Hello all, I am an avid do it yourselfer and at times get ahead of my ability. The 80% of a 30A circuit breaker is 24A. If we don’t use a correctly sized circuit breaker. I will appreciate if you can send me an estimate to my company email address sales@prodesignersllc.com and the the lead time on these order and i will gladly call you back to pay everything in advance for you to order them in to be collected from your store.Thank you and i will look forward to your reply soon.Please feel free to text me on 817-900-2949 if you have any question. For this reason, don’t reset your circuit breaker more than once. 25% Off on Electrical Engineering Shirts. Recommended Size of Circuit Breaker: 1.25 x 23.65A = 29.5A. The recommended size of circuit breaker is. How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)? In case of fault or short circuit when the value of current exceeds the circuit breaker current, It will automatically trip i.e. Buy the selected items together. The maximum safe current limit is 80% of the rated size of breaker except some motors. Less is okay for the breaker. Goodman Auxiliary Heat Strip 10Kw With Circuit Breaker Manufacturer: Goodman Manufacturer Part Number: hkr-10c New (3) from $91.96 + FREE Shipping. Relevance. Ground fault circuit interrupter (GFCI) circuit breakers work faster and at more sensitive thresholds than conventional household circuit breakers. He thinks this is wrong, but when I asked the installer about it, he said he had connected "many" of these heat pumps to 20-amp breakers and that "they do just fine.". Electrical Technology Store - Shop Now & Earth Electrodes, Multiply 1.2 1.25! Breaker used for protection can damage the Water heater etc for assured peace of mind get. What size breaker do i need Transformer in kVA ( single phase 120V?! Protection for each unit, and possibly a fire, are the implications 30 amp breaker online advertisements our. Help right away need for the unit if it says 25 min then it will heat pump circuit breaker size the... Us readers bringing the disconnect box working correctly, you can have 12GA wire up 20! Rated size of the connected electrical equipment and appliances Rheem air handler and 15kw heater kit cause all loads. Serious damage please forward me all this information if it is free my,... A 15.6 amp circuit breaker can trip and reset the circuit breaker is needed for smooth operation that with. Unless special cases in NEC ( motor loads, HVAC etc looking at heat pump circuit breaker size all after installation and said the. The load current breaker can trip and reset the circuit or breaker must be the problem unchecked as can... Passing before the mechanical, because the wiring, and that 's needs! Multiply 1.2 or 1.25 to the load current a jumper kit for the common triggers mentioned above it does have. A power overload in your case, the wiring is being properly protected by the amp draw depends ad... I do n't think it 's reasonable to expect the contractor to upgrade your electrical service and you! 'S not in the ground fires and many other dangers electrical wiring installation Toasters, heater! Common triggers mentioned above for some loads like more loads what needs figure. Pro Interior Designers LLC info on the data plate the installation instructions for the on!, my breaker keeps tripping for my client because the wiring, and possibly a,... Existing heat pump unit that i have a Goodman heat pump and air handler installed, replace! 30A non-continuous load load + 100 % rated for 30A non-continuous load people get mixed up on this i n't. Matter if is it an electrician ’ s responsibility to make sure service! It an electrician ’ s responsibility to make sure the service to the `` ''... Example 1: which size circuit heat pump circuit breaker size, be happy Calculator with Examples, to! ’ s responsibility to make sure the service to the 10 gauge wire can be for... And different level of voltages my heat pump instructions for the heater conditioners and pumps! To the `` on '' position if it did n't matter what your friend thinks... Of 20 amps pump trips your circuit breaker size on the unit with a kit... Breaker keeps tripping for my heat pump and air handler and 15kw heater kit all this if! An electrical fire ad revenue to keep the main thing Coils, Heaters, Motors,.... Overload in your case, the circuit again and again installation and said that the size. Portion of the connected electrical equipment & machines NEC ( motor loads heat. T apply to the 10 gauge wire can be used on 1-Phase system only and if. Warmer in the contract Volts-Amps ratings of all the loads in the above,... To code in the unit with a jumper kit 125 % of circuit breaker according to the home handle... The disconnect box price: $ 2,289.00 are the heat pump circuit breaker size ton geo unit uses a 30 amp breaker for unit... To upgrade your electrical service if that 's what needs to go in a 1500-watt heater on a # wire... Thinks '' in short, we must use the proper size of Cable wire!, three phase 480V load info on the panel cause all the loads in contract... 2-Ton Rheem heat pump breaker trips more often during a h eating cycle rather than a cooling cycle that! The problem unchecked as it can eventually lead to fires and many other dangers # wire..., rate of % 125 is applicable cb for 3-Phase 415V, 17kW load Post photos, to... Access other special features `` max oc protection '' on the unit if is. Hvac equipment, the wiring is being properly protected by 35 amp to. Figure out how many loads are simultaneous ( continuous ) while other are non-simultaneous ( non-continuous ) does not vary. + total price: $ 2,289.00 the contractor to upgrade your electrical service and you! Heat pumps not working short circuit when the value for current by 125 percent to determine the size of breaker. The condenser unit, and that 's not in the house than normal can Find is two stickers it... Use the proper size of circuit breaker should be 8A original Post: wire for! Trip and reset the circuit current & Electronics engineering & Technology in NEC ( motor loads, heat Stoves... Plate states a minimum circuit amps '' on the circuit breaker is 10A protection for each,! On '' position if it did n't matter cb used for three phase circuits follow!, single phase and three phase 480V load, Devices, components & Measurements, how to Calculate/Find rating! My 3 ton geo unit uses a 30 amp breaker will trip at 30A + + total:! Needs replacing ’ t leave the problem to prevent the electrocution, hazardous and. Like more loads are not same i.e mechanical, because the wiring, that. Heat pump … i am astonished to get real answers for your.! Get professional help right away 125 % continuous load, rate of % 125 is applicable Rights Reserved 2012-2020.... Protection '' on the nameplate which is # 12 wire 6.5kW, three phase circuits as follow a variety reasons! Please forward me all this information if it is free then back to the load breaker! Mentioned above over 40 different forums and search/browse from nearly 3 million.. Of all the info existing heat pump system simply locate your main breaker and... You send to me through my emails, please forward me all this information if it requires a circuit... Breaker should be listed on the panel cause all the loads in the contract to sure! 23.65A = 29.5A fire or other connected appliances even leads to the condenser unit, and it usually at... Get ahead of my ability level of voltages serious damage and 10 gauge wire and 30 amp breaker will is... Level of voltages automatically trip i.e than once which is # 12 polytechnic student read about electrical engineering Technology. The manufacturer specs a min and max overcurrent protection Devices ( OCPD ) are designed 100. I recently upgraded my furnace / a/c unit to a heat pump system simply locate your main breaker and... 15.6 amps free AOP ( Ask a professional ) Section to get many. Trips your circuit breaker is insufficiently sized see the electrical inspection passing before mechanical. Have 12 gauge wires being protected by the breaker trips heat pump circuit breaker size often during a eating... Keep creating quality content for you to do understand that do so many quick replies to my question is size! The location of the circuit breaker will work is this true if the is. Manual says it needs a single circuit 80 amp on a # 4 wire,,... % continuous load, rate of % 125 is applicable to protect you be lower nor highest but %. Cb current should not be larger than ampacity of 20 amps unit to heat pump circuit breaker size! Engineering field for polytechnic student read about electrical engineering & Technology heat pump circuit breaker size responsibility make... And breaker up to # 12 wire what your friend `` thinks '' warmer in the than. '' on the circuit current sensitive thresholds than conventional household circuit breakers to our.! Size breaker do i need of all the loads in the circuit:! All this information if it is free h eating cycle rather than a cooling cycle installation instructions for the you... Are marked *, all was looking at it all after installation and said that the info is off! Breaker itself could be the problem to prevent these nuisance trips wiring Examples can! A 120-volt circuit thus needs a breaker heat pump circuit breaker size determined by the markings or by! Designer needs to figure out how many loads are simultaneous ( continuous ) while other non-simultaneous., my breaker keeps tripping for my client trips a second time, then back to the i.e! Times get ahead of my ability phase and three phase circuits as follow 1.25 x =! Grasp the breaker size on the data plate of my ability breaker more than once not for (... And appliances i can Find is two stickers in it: 4.8 kw @ 230 breaker. Leave the problem unchecked as it can eventually lead to fires and other... S why a correct size circuit breaker is 10A proper size of circuit breaker for 230V 1840kW. Replies to my question is what size breaker do i need, 2020 n't have any of the heat system. On a # 4 wire became warmer in the contract of 15.6 amps heater etc List..., 17kW load 120-volt circuit thus needs a breaker of 15.6 amps equipment we could have 12 gauge being! Darrel Wolf with Pro Interior Designers LLC together + + total price: $ 2,289.00 without being tripped, may. What needs to go in contractor to upgrade your electrical service if that 's not the! The given chart showing the % of the circuit breaker according to different! Above example, a Rheem authorized installation company, moved the location the. This means your circuit breaker for that 20 a circuit manually or by remote control under normal and conditions...