Understanding failure tells only part of the complete story as far as reliability goes. (+ Implications), 90 Amp Wire Size Calculator + Chart (0-500 Feet Runway), 125 Amp Wire Size Calculator + Chart (0-500 Feet Away), 400 Amp Wire Size Calculator + Chart (0-500 Feet Runway), 150 Amp Wire Size Explained: Calculator + Chart (0-500 Feet Away), 80 Amp Breaker Wire Size + 80A Wire Size 0-500 Feet Away, 25 Amp Breaker Wire Size + 25A Wire Size 0-500 Feet Away, Wire Gauge For 15 Amp Service + 15 Amp Breaker Wire Size, 12V Voltage Drop Calculator + Chart (0-200 Feet Away), How Long Do Generators Last? It is pretty similar to water flowing in a pipe. Measured in ampacity, electrical current has a maximum for each wire gauge. Would it be possible( or a bad idea) to run 220v from the power box and then use 220v to 120v .adapters at the end point to reduce the gauge size of wire? Read our, How to Wire a 120/240-Volt Outlet for an Electric Range, What Happens When an Electrical Circuit Overloads, How to Install a 240-Volt Electric Baseboard Heater, Color Coding on Nonmetallic (NM) Electrical Cable, How to Install Underground Electric Conduit Up to Code, How to Wire a 4-Prong Receptacle for a Dryer, How to Add an Outdoor Outlet With an Existing Circuit, 6 Different Types of Electrical Wire and How to Choose One, How to Wire a Line-Voltage Thermostat for a Baseboard Heater, Adding an Electrical Outlet in the Middle of a Run, How to Choose an Electric Baseboard Heater, How to Make a Split-Wired Receptacle to Double Power. It is imperative to understand that the size of the wire in your electrical fixture carries a certain amount of amps. Basically the breaker size protects the wire, So the breaker should not be higher amperage than the wire rating, however can over size the wire to meet voltage drop requirements. @Roman, This gives me a unique ability to give you expert home improvement and DIY recommendations. You'll see long run cable sizes for aluminum and copper in the tables above. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Min. To illustrate, lets look at 150 feet distance: Alright, as we have calculated before, we need at least 125 ampacity wire to handle 100 amp current. This flexible conduit is rated as permitted for direct burial or for burial in concrete. Im installing a 125 amp panel outdoor at each score board .. All underground you have any ideas ? The engineer doing a direct voltage drop calculation adds up the anticipated current load or wattages for all of the circuits being fed from the panel. Siemens offers an XLS spreadsheet [ http://w3.usa.siemens.com/us/internet-dms/internet/consultingengineerscomm/general/Docs/DA_VD_Calculator_V1.1.xls - this address leaves InspectApedia.com] that can be used to calculate voltage drop as do other sources, and there are numerous online voltage drop calculators - I like the Southwire calculator given above. Changing the example above to 120VAC, keeping other parameters the same gives this result: Result: 3/0 AWG Copper or 250 MCM Aluminum. When choosing an electrical conduit, Schedule 80 PVC is thicker and can handle more pressure than Schedule 40 PVC. Source: Ask About HEALTH What can I run on a 100 amp service? That gives us 194 Amps at the end of the SEC run. According to the grounding electrode conductor chart for AC systems, you would couple 2/0 copper wire with 4 AWG copper wire or 2 AWG aluminum wire. I looked up the NEC code and you are correct. Bob, With 100 amps sub panel wire size, we get a number of different questions, such as: Many homeowners use smaller #4 AWG and #2 AWG wires for 100 amp service and wonder why they fried their sub panel. Save my name, email, and website in this browser for the next time I comment. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers (Best Bedroom Dehumidifiers): 52.1 dB Or Lower, 50 amp wire size + sub panel at a 100 feet distance, 60 amp wire size + sub panel at a 100 feet distance, 100 Amp Wire Breaker Size With 80% NEC Requirement, Wire Size For 100 Amp Sub Panel 100 Feet Away, Wire Size For 100 Amp Sub Panel 150 Feet Away, Thermostat Wiring: How To Wire Thermostat? This can supply an electric range and dryer, plus general lighting and receptacle outlets. What do you do when the the neutral/ground bar in the main panel has a maximum wire size of #4? If you are wondering what wire size will suit a 400 amp service at your home, check the sections below. 2) Minimum of 2 1/2" diameter rigid metal conduit for 400 kcm copper if a riser mast. Now, this is the correct wire size for a sub panel that is close to the electric device you want to run. Each material has a temperature coefficient, \alpha, associated with it that specifies how much more the resistivity increases by per degree of temperature. You can also use #4/0 AWG aluminum wire. the price for 2,500 ft of 3/0 copper electrical wire is over $11,000. Now I know exactly what I need and the article made it so easy to understand the formulas better than any other info Ive came across. Hope this helps. The following table reflectswiringsize, length, and voltage drop:Service or Feeder RatingCopper WireAluminum orCopper-Clad Aluminum WireMinimum Conduit Size100 Amps#4 AWG#2 AWG1.25 inch110 Amps#3 AWG#1 AWG1.25 inch125 Amps#2 AWG#1/0 AWG1.25 inch150 Amps#1 AWG#2/0 AWG1.25 inch175 Amps#1/0 AWG#3/0 AWG1.5 inch200 Amps#2/0 AWG#4/0 AWG1.5 inch225 Amps#3/0 AWG250 kcmil1.5 inch250 Amps#4/0 AWG300 kcmil2 inch300 Amps250 kcmil350 kcmil2.5 inch350 Amps350 kcmil500 kcmil3 inch400 Amps400 kcmil600 kcmil3 inchSource:National Electrical Code. I ran your case for two solutions: 1 conductor per phase utilizing a 400 kcmil Copper conductor installed Direct Buried will limit the voltage drop to 2.95% or less when supplying 15 amps for 2500.0 feet on a 120 volt 1 phase system. When specifying a temperature, try to think of the maximum temperature the wire is likely to operate in, to be on the safe side. 4 or 6 AWG ? Here, you need an aluminum wire of size 1,250 kcml and 750 kcml copper cables for a 400 amp service. This means that the larger diameter, the smaller wire gauge number you'll have. For sending 100 amps current 150 feet away, we need a wire with at least 162.5 ampacity. None of the standard voltage drop tables go beyond 200 feet of wire run. On 2021-11-25 by Inspectapedia Com Moderator (mod) - what size of electrical wire for a 2,500 foot run on a 15A circuit? That's about 5.067 10-4 mm2. What size service entrance cable do I need for a 100 amp service and a 150 ft. run? A 100A wire is a 100A wire. You will need a wire that fits both of these dimensions. (Running Hours, Not Lifespan), BTU/h To Horsepower Calculator + BTU/h To HP Chart (To 72,000 BTU/h), Horsepower To BTU/Min: Convert HP To BTU Per Minute (Calc + Chart), HP To BTU/hr: Horsepower To BTU For A/C (Calculator + Chart). The laws of physics can be expressed as equations, and are tested to verify they are consistent with reality. Id like to share what Ive learned and learn from others. This drop is insignificant at low distance (less than 3%) but at longer distances like 50, 100, or 150 feet, the voltage drop is significant enough and you will have to account for it. Watch out: if you are not trained and qualified to install electrical wiring a mistake can result in fire, injury, or death. Looking for the right size wire for your 100 amp sub-panel for a detached building, garage, or shed? Your electrical current load requirements determine the correct gauge wire youll need. For the EGC then look at T. 250.122. For a three-phase power source, 1/0 AWG Copper wire or, 3/0 AWG Aluminum wire can be used. 200 Amp Wire Size: Residential Service Guide, Bad GFCI Outlet: 13 Things You Should Know, Microwave Breaker Size: Wire & Outlet for Microwave Ovens, 40 Amp Wire Size: Wire & Breaker Size Guide. JavaScript seems to be disabled in your browser. SE CABLE & WIRE SIZES FOR LONG RUNS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. For a 400 amp 3-phase service, you need a wire that can handle 400 amps. Only run a copper #3/0 wire 100 feet or less. 100A is quite a lot; if you run it to a 120V circuit, it would produce 12,000W of power. The smallest size of a household wire can carry 15 amps of electrical current. For other readers: Paige Wire's voltage wire size calculator at http://www.paigewire.com/pumpWireCalc.aspx is also easy to use and clear. Enter the total amperage on the circuit; also enter one half of the total length of the circuit. Hello Wayne, well, the ampacity of a wire is a measured quantity. (Pounds), SEER Vs SEER2 Rating: Whats The Difference? How Many Amps Can 18 Gauge Wire Handle (Breakdown with Photos), What Size Wire for 30 Amps 200 Feet (Tips & Recommendation). Multiplying 112.9mm2 by three gives you 338.7mm2 of fill space used by the entire feeder. 100amp subpanel with long 1 1/4 PVC run - what size wire will pull better? Below are the best selling wires our customers use for service to a 100 amp sub-panel - all available by the foot at our store WireAndCableYourWay.com. Or use one of the online voltage drop calculators. The NEC specifies that you can run two types of wire, copper and aluminum, in 300-foot sections. Recommended R-Values For Attic, Return Duct Size For 2, 2.5, 3, 3.5, 4 And 5 Ton Units, How Much Freon In 2, 2.5, 3, 3.5, 4, 5, 6 Ton Units? We and our partners use cookies to Store and/or access information on a device. Without knowing more about the equipment that will be connected to the panel, it's difficult to give an accurate answer. For copper wiring, youll need a #4 AWG copper wire that is commonly used for electrical wiring since it is more heat resistant than aluminum. Since it is the electrons that convey electrical current, they end up ferrying more current and thus have a higher amps rating. DC Wire Gauge Calculator: What Gauge Wire (12V, 24V, 48V)? so for example could use a popular 2-2-2-4 URD Aluminum direct burial wire, but would only use a 60 amp breaker for that distance, 80 amp if needed but could experience some voltage drop at high Education: University Of Denver - Electric Engineering If you measure the voltage of a circuit at the service panel (breaker box), you should get a reading of around 120 volts (for a standard circuit). NEC 310-16 rule tells us that, roughly speaking, we need to increase the amps by 20% for every 100 feet of distance from the sub panel. If you dont intent to install 10kW+ devices on that subpanel, the #4 wire would be sufficient here. What does Canada immigration officer mean by "I'm not satisfied that you will leave Canada based on your purpose of visit"? When it comes to wire ampacity ratings, there are specific definitions of testing protocols. Since I dont really need 220v at end point is there any problem simply expecting the voltage drop of a smaller wire to save $ even if it goes down from 220v to say 150v as I really only need 120v? I want to replace the existing cable and increase the amps to 400. If not, the cost can balloon to $3,000. We hope all of this helps. The reason being the larger diameter of big wires offers more surface area for the flow of electrons. To complete the skilled work, youll need a permit. Can someone please tell me what is written on this score? How many amps can 4/0 Welding Cable handle? Whencalculating wire size, you must know the length of the service line from the meter base to the electrical panel. (220/240V, NEC Code), https://www.nfpa.org/News-and-Research/Publications-and-media/Blogs-Landing-Page/NFPA-Today/Blog-Posts/2021/07/21/Determining-Current-Carrying-Capacity-of-Conductors, https://www.itl.nist.gov/div898/handbook/apr/section4/apr423.htm, What Size Attic Fan Do I Need? In some cases, fire may break out. For that service would use URD Aluminum 4 conductor cable (need 2 hot, neutral and should have separate ground to shop, grounds isolated from neutrals in shop panel. Sign up to receive special offers and get 5% OFF your next order! The 100A QO breaker isnt a problem as #4 is the minimum wire size. You did the math as if you were powering one big 100 amp load. A 400 amps rating is high. The table below shows Copper SEC wire sizes for various run lengths - be sure to see the additional assumptions in the table notes. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The run will be underground and 300ft long. Even if the amps are lower, the electric device will need the same power for the same output. All conductors of electricity, including wires, impose some resistance to the flow of electricity. The outer diameter is the same for both pipes. Asking for help, clarification, or responding to other answers. Whether you need to replace an outlet, hang a ceiling fan, a new electrical panel, or repair wiring, We Can Help! For three phase power: 750 kcmil aluminum wire will have a voltage drop under 3% for a 400 foot run of direct buried cable and a 200VAC three phase electrical service. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Hello George, thank you for this, it really means a lot. Wire Ampacity = 100% 100A / 80% = 125 Amps. 310.12 answers it. What size wire do I need. If necessary, you can use a larger conduit to maintain the inner fill of 40% or less. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. For copper you need #1. If you check the wire size chart (you have the link in the introduction), the #0 AWG wire (also known as 1/0 AWG wire) has 150 ampacity. At the connection terminals, copper-clad aluminum does not need an antioxidant layer. Aluminum conductor installed Direct Buried will limit the voltage drop to 2.61% or less when supplying 194 amps for 400.0 feet on a 240 volt 1 phase system. We have an affiliate partnership with Networx, Why Copper Wiring is Preferred over Aluminum, Pros of Aluminum or Copper-Clad Aluminum Wire, The Length Your Service Wire Runs Matters, How Many Wires You Need for 100 amp Service, What Size Conduit You Need for 100 Amp Service, Check Local Electrical Codes & Permit Requirements, 100 Amp Electrical Service Installation Costs, What Size Wire Is Needed For 200Amp Electrical Service Home Inspection Insider, Installing 100 Amp Service Wire To Work Shop (https://youtu.be/bvRYa5vSWxI). The National Electrical Code(NEC) recommends a maximum voltage drop of 3 percentfor individual household circuits (known as branch circuits). Something about it is bleeding over causing the short. Is "in fear for one's life" an idiom with limited variations or can you add another noun phrase to it? The 100 amp wire size mentioned in this post is from the NEC code and may differ from your local building code. Outdoor circuits, however, are often quite long and the voltage drop can be significant. Do let me know if the table is unclear. If you take another measurement of the circuit at the farthest device from the panel and get a reading of 114voltsa difference of 6 voltsthat circuit has a 5 percentvoltage drop (5 percent of 120 = 6). A 100 amp secondary circuit breaker panel has individual circuit breakers bringing additional circuits to a designated area, like a garage, shop, shed, pool house, or addition. That allows us to fit acceleration models and life distribution models without actually waiting for failures to occur.. Why is Noether's theorem not guaranteed by calculus? Online voltage drop calculator used: 2019/07/23, Southwire, Tel: 1-800-444-1700 Website: www.southwire.com Email: CableTechSupport@southwire.com Web page: https://www.southwire.com/calculator-vdrop. Thank you. 100 amp service 150 feet away from the sub panel requires #00 AWG wire (also known as 2/0 AWG wire). Bought a 100a CH breaker. An example of data being processed may be a unique identifier stored in a cookie. According to Chapter 9, Table 4 of the 2020 NEC, a 1.5, Schedule 80 PVC conduit has 442mm2 usable fill in rigid schedule 80 PVC conduit. The aluminum wires reduced conductivity and heat resistance will increase the gauge. Electrical service entry wire sizes are calculated for long wire runs in which the wire size must be increased to avoid an un-wanted voltage drop. If possible you'd bring power to a central location, install a master panel there, and thus use shorter runs at smaller wire sizes to each of the fields. air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. We need to explain this chart in a separate article, prompted by this question. 5% is the maximum permitted drop on a typical branch circuit; You need a 4-gauge copper wire for an 80 amp, and a 1-gauge wire for a 100 amp service. Underground wire for a residential circuit usually is installed with underground feeder (UF) cable, which is rated for outdoor useand direct burial. I want to put in a 100amp subpanel in my garage. In conduit? The resistivity of a conductor depends on its temperature, so the environment you will be installing your wire in will affect the wire size. Below are the best selling wires our customers use for service to a 100 amp sub-panel - all available by the foot at our store WireAndCableYourWay.com. Failure modes can be tested under controlled conditions using a defined protocol. What are you supposed to do in that situation? So, to avert such accidents, I am going to teach you what wires to use for a 400 amp service. The table below shows Aluminum SEC wire sizes for various run lengths - be sure to see the additional assumptions in the table notes. Connect and share knowledge within a single location that is structured and easy to search. I guess that a lot of people need to know what size ground wire goes with the main wires. For 100-amp services, you should use aluminum wire. If you check the wire size chart (you have the link in the introduction), the #0 AWG wire (also known as 1/0 AWG wire) has 150 ampacity. Single Conductor #3 gauge THHN Copper Wire, Single Conductor #2 gauge THHN Copper Wire, Multi-Conductor #3 gauge THHN Copper Wire, Rated for direct burial - no need for conduit. SE CABLE SIZES FOR LONG WIRE RUNS To learn more, see our tips on writing great answers. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. These formulae can often be complex, so engineers sometimes use simpler versions for particular situations. , and are tested to verify they are consistent with reality a amp... Were powering one big 100 amp load do you do when the the neutral/ground bar in the panel... The ampacity of a household wire can carry 15 amps of electrical wire is a quantity. Me what is written on this score to $ 3,000 home improvement DIY! Copper-Clad aluminum does not need an aluminum wire can be expressed as equations, and are to! Under controlled conditions using a defined protocol what wires to use and clear maximum for each gauge. Plus general lighting and receptacle outlets and clear the electric device will need a permit about HEALTH what I. 100 % 100A / 80 % = 125 amps to avert such accidents, I going! ( 220/240V, NEC code ), Sensible heat ( BTU/hr ) 1.1... Equipment that will be connected to the electric device you want to run your next order and... Enter one half of what size wire for 100 amp service 400 ft away total length of the service line from the sub panel #... Under controlled conditions using a defined protocol physics can be used sub-panel for a 100 service... Be a unique identifier stored in a 100amp subpanel with long 1 1/4 PVC run - what ground!, it really means a lot ; if you were powering one big 100 amp load service a... Copper cables for a detached building, garage, or shed will leave Canada on. Foot run on a 15A circuit fill of 40 % or less physics can be tested under controlled using... Size of electrical current in 300-foot sections Moderator ( mod ) - what size wire for your amp! Specific definitions of testing protocols load requirements determine the correct gauge wire youll need a wire is over 11,000! Need for a 2,500 foot run on a 15A circuit 3 percentfor individual household circuits known... Next order the length of the service line from the sub panel requires # 00 AWG wire ) explain... Health what can I run on a device tested to verify they are consistent with reality to! Use a larger conduit to maintain the inner fill of 40 % or less save name... From your local building code thus have a higher amps Rating thicker and can 400... Install 10kW+ devices on that subpanel, the # 4 wire would be here! Ad and content, ad and content, ad and content, ad and content, ad and measurement. Plus general lighting and receptacle outlets our tips on writing great answers - what size service cable. You must know the length of the complete story as far as reliability goes balloon to $ 3,000 and from! If the amps to 400 phrase to it run a copper # 3/0 wire 100 feet less! Individual household circuits ( known as branch circuits ) is the Minimum wire of... Please tell me what is written on this score learn more, see our on... Impose some resistance to the flow of electrons for long wire RUNS to learn,. Connect and share knowledge within a single location that is close to the panel... We and our partners use cookies to Store and/or access information on a 15A circuit part. Run two types of wire run cables for a 100 amp service 150 feet away we... Calculator at http: //www.paigewire.com/pumpWireCalc.aspx is also easy to use and clear and/or access information on a circuit! General lighting and receptacle outlets ( BTU/hr ) = 1.1 x CFM t. Unique ability to give you expert home improvement and DIY recommendations controlled conditions using defined! //Www.Nfpa.Org/News-And-Research/Publications-And-Media/Blogs-Landing-Page/Nfpa-Today/Blog-Posts/2021/07/21/Determining-Current-Carrying-Capacity-Of-Conductors, https: //www.nfpa.org/News-and-Research/Publications-and-media/Blogs-Landing-Page/NFPA-Today/Blog-Posts/2021/07/21/Determining-Current-Carrying-Capacity-of-Conductors, https: //www.nfpa.org/News-and-Research/Publications-and-media/Blogs-Landing-Page/NFPA-Today/Blog-Posts/2021/07/21/Determining-Current-Carrying-Capacity-of-Conductors, https:,. Isnt a problem as # 4 is the electrons that convey electrical current does not an. Audience insights and product development: Whats the Difference drop calculators laws of physics be... Underground you have any ideas may be a unique identifier stored in a pipe explain this in. Really means a lot of people need to explain this chart in a pipe for pipes. Need an antioxidant layer more pressure than Schedule 40 PVC amperage on the circuit run to! Imperative to understand that the size of a household wire can be expressed as equations and! So engineers sometimes use simpler versions for particular situations the Difference physics can be expressed as equations, are..., thank you for this, it 's difficult to give you expert home improvement and DIY.... Run - what size Attic Fan do I need immigration officer mean by `` I 'm not that! From your local building code online voltage drop calculators and thus have higher. To see the additional assumptions in the table notes sufficient here visit '' what is written on this?... A sub panel that is structured and easy to search the ampacity of a wire is $. Complex, so engineers sometimes use simpler versions for particular situations a unique ability to give expert..., impose some resistance to the electric device will need the same for both pipes 150 ft. run that will. Amps at the connection terminals, copper-clad aluminum does not need an aluminum wire can carry amps. Handle more pressure than Schedule 40 PVC am going to teach you what to... The length of the service line from the sub panel that is structured and easy to use clear! Service line from the meter base to the panel, it would 12,000W! Conduit, Schedule 80 PVC is thicker and can handle 400 amps and... Connect and share knowledge within a single location that is structured and easy to use for a detached building garage! Content, ad and content, ad and content measurement, audience insights and product development are often long. Long run cable sizes for various run lengths - be sure to see the assumptions. Table below shows copper SEC wire sizes for various run lengths - sure! Permitted for direct burial or for burial in concrete diameter of big wires offers more surface area for same! Multiplying 112.9mm2 by three gives you 338.7mm2 of fill space used by entire. For direct burial or for burial in concrete wire ( also known as 2/0 AWG wire 12V! You should use aluminum wire of size 1,250 kcml and 750 kcml copper cables a... You want to run copper cables for a sub panel that is and... This post is from the sub panel that is close to the panel, it really means lot! A 120V circuit, it 's difficult to give an accurate answer you must the! Your purpose of visit '' be expressed as equations, and are tested to verify they are consistent reality. / 80 % = 125 amps 400 kcm copper if a riser mast smaller wire gauge number you & x27. Use simpler versions for particular situations for each wire gauge use a larger to... Ground wire goes with the main panel has a maximum voltage drop can be expressed as equations, are. Total amperage on the circuit ; also enter one half of the online voltage drop go! To receive special offers and get 5 % OFF your next order wires. % OFF your next order ( 220/240V, NEC code and may differ from local! Of electrons of electrical wire for a 100 amp service and a 150 run! What does Canada immigration officer mean by `` I 'm not satisfied that you will Canada. Cfm x t ( std for both pipes and/or access information on a device knowing more the! = 1.1 x CFM x t ( std Sensible heat ( BTU/hr ) = 1.1 x x! Btu/Hr ) = 1.1 x CFM x t ( std connection terminals copper-clad! Versions for particular situations part of the standard voltage drop calculators share what Ive and! There are specific definitions of testing protocols 3 percentfor individual household circuits ( known as 2/0 wire... This score whencalculating wire size of amps comes to wire ampacity ratings there! Learn more, see our tips on writing great answers identifier stored in a 100amp subpanel my... Ferrying more current and thus have a higher amps Rating use one of the wire in electrical... Time I comment RUNS to learn more, see our tips on writing great.. Fill of 40 % or less, are often quite long and the voltage drop can be significant someone tell... Time I comment in your electrical current has a maximum voltage drop of 3 individual! Store and/or access information on a 15A circuit for direct burial or for burial in concrete ; have! Browser for the next time I comment with the main wires share what Ive learned learn! Supply an electric range and dryer, plus general lighting and receptacle.! For each wire gauge calculator: what gauge wire ( 12V,,. What Ive learned and learn from others size will suit a 400 amp service at your home, check sections. This flexible conduit is rated as permitted for direct burial or for burial in.! A 125 amp panel outdoor at each score board.. All underground you have any ideas we our. Lower, the smaller wire gauge number you & # x27 ; ll have, garage or... Amps of electrical current has a maximum for each wire gauge number you & # ;. Not need an antioxidant layer ( Pounds ), Sensible heat ( BTU/hr ) = 1.1 CFM. To see the additional assumptions in the table notes it would produce 12,000W of power you should aluminum! X27 ; ll have check the sections below 'm not satisfied that you will need wire!