Nec wiring size chart

To determine the load, add up the wattage of all electrical devices that will be on the circuit and divide this total by the voltage of the circuit, usually 120 volts or 240 volts. 120 Volt, Conductor size (AWG or kcmil) Single Phase, Max 3% Voltage Drop*. Length of Run. 25'.Example 1: Determine the minimum size of the equipment grounding conductor for a circuit protected by a 250 A automatic overcurrent protective device. …Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually eliminated. Information taken from NEC Appendix C, Table C.9. Resource: NEC Conduit Fill Charts & Tables for ENT (Electrical Non-Metallilc Tubing) and Schedule 80 PVC ... 350 Amps. 350 kcmil Copper Wire. 500 kcmil Aluminum Wire. 400 Amps. 400 kcmil Copper Wire. 600 kcmil Aluminum Wire. This table is quite easy to use. For example, let’s say you are trying to figure out the feeder wire size for 300 amp service. By checking this table, you can see you will need either 4/0 AWG copper wire or 300 kcmil aluminum ...June 29, 2021. The PVC conduit fill chart offers a quick and convenient suggestion to determine the number of wires in a conduit. There are several types of PVC conduits on the chart i.e. SCH 40 and SCH 80. The PVC conduit fill chart fully complies with NEC 2020 chapter 9. For a mix of wire type and size, an online tool to decide conduit fill ...– The calculator allows entry of a voltage drop, but caution should be used when doing so to make sure you are calculating the wire sizes in accordance with NEC article 210-19 (FPN No. 4.) The NEC allows a maximum of a 3% voltage drop on the main branch of a circuit at the farthest outlet of power and 5% total to both feeders and branch ... Wire Ampacity Chart for Copper Wires. Related: Lawn Mower Battery size guide (with easy to use size charts) kcmil or MCM Wire: mm2 (Diameter): Ampacity At 60°C (140°F): Ampacity At 75°C (167°F): Ampacity At …Conductor Ampacity Tables – Data Bulletin. Single-Phase Dwelling Services and Feeders. NEC 210.19 Conductors–Minimum Ampacity and Size. For the best experience of this site, please enable Javascript for the www.productinfo.schneider-electric.com. Temperature Rating of Conductor. (See Table 310.104 (A).) Types RHW, THHW, THW, THWN, XHHW, USE ... 12 Oct 2023 ... Step 1: Open your NEC book to chapter 9 · Read down the first column on the fill table to find the wire gauge · Across from the wire gauge, you'll...Required Wire Size: #0AWG (1/0 AWG) Cupper (#3/0 for Aluminum) based on the above calculation and AWG chart and tables based on NEC, the right size wire for 100 amp circuit at a distance of 100 feet from the main panel to subpanel is 1/0 AWG (AKA #0 AWG). It means, an the wire having ampacity of 150A is sufficient to deliver 100A to the the ...8 Feb 2022 ... Ampacity Table, NEC 2020 - [310.15], (13min:26sec). MikeHoltNEC•55K ... Understanding ampacity and temperature rating of different wire.Mar 2, 2021 · If you turn to Section 250.122 in the 2020 NEC, you find information that has been helping electricians to size equipment grounding conductors (EGC) for longer than most electricians have been pulling wire. If you were on the job prior to 1996, you would have happened on this information in “250-95” in your Codebook, instead of 250.122. Min. Ampacity (150W) = 12.5A × 1.25 = 15.63A. That means we need a wire size with an ampacity of 15.63A or higher. To choose the correct AWG wire size for a 12-volt circuit, consult the complete AWG wire size chart here. From this chart, we see that 18 AWG wire has an ampacity of 14A (copper wire, at average 75°C). To calculate ground wire size, use the Ground Wire Size Calculator. Wire Size - Choose the size wire in the circuit. Units for wire size are AWG or kcmil. Distance - Enter the one-way length of the wires in the circuit in feet. Note: The results of this calculator are based on conductor temperatures of 75°C. Source: NFPA 70, National ...(2) Wire Selection is based on table 310.16 (2020). The following additional NEC references should also be applied: The following additional NEC references should also be applied: *Section 240.4(D) Overcurrent Protection Limitations (unless otherwise specifically permitted elsewhere in the NEC NFPA70® Code, the overcurrent protection for In the 2017 NEC ®, Section 310.15(B)(7) contained rules on calculating the conductor size for 120/240-volt, 3-wire, single-phase dwelling services and feeders. Back in the 2011 NEC ®, a simple table existed showing the service size on the left and the minimum size conductor required to supply the service on the right. Circuit Distance Calculator. Enter the information below to calculate the appropriate wire size. Note: The results of this calculator are based on conductor temperatures of 75°C. To calculate voltage drop based on circuit distance, use the Voltage Drop Calculator. To properly size wire for various applications, use the Wire Size Calculator to ...This DC wire size calculator will help you calculate the wire gauge automatically. Example: For 100 amp service, you will a wire with at least 125A ampacity. That means you will need a 1 AWG wire for 100 amps since it has 130A ampacity. Wire size chart. In this chart, you can find wire sizes for 1 amp, 10 amp, 20 amp, 30 amp, 40 amp, 50 amp, 60 ... Table 3.10.1.19 Allowable Ampacities of Single-Insulated Conductors, Rated 0 Through 2 000 Volts, 150°C Through 250°C (302°F Through 482°F), in Free Air, Based on Ambient Air Temperature of 40°C (104°F) Size mm 2 (mm dia.) Temperature Rating of Conductor (See Table 3.10.1.13.) Size mm 2 (mm dia.) 150°C (302°F) 200°C (392°F) 250°C ...Copper Electrical Wire For House Wiring Size 1mm 6 Mm Rs 420 Box Id 22229341091. Thhn Wire Flat Cord Wires Pdx And Royal In Meters Electrical Belden Cat5 Cat6 Extension 1 Meter Sho Philippines. Boston Wiremax Thhn Stranded Wire Per Mtr 14 7 2 0mm 12 3 5mm 10 5 8 8mm Electrical Sho Philippines.After all, 80 amps aren’t really listed in the NEC wire size chart. There’s no better resource to get the answer from than that book. Since that’s the case, we look at the next largest size in the 75°C column while applying the 80% NEC rule on conductor size. 80% of 100A is 80A, so we’ll use the wire size recommendation for 100 amps ...When it comes to electrical installations and appliances, safety should always be the top priority. One critical aspect of ensuring safety is choosing the right wire size for the a...Calculating The Minimum Size Junction Box for Electrical Wiring. Wire in Electrical Box - Box Fill Calculations Part (1) of Section 370-16(a) describes in detail the method of counting wires, as well as clamps, fittings, or devices (i.e., switches, receptacles, combination devices) - by establishing an equivalent conductor-value for each. To determine the load, add up the wattage of all electrical devices that will be on the circuit and divide this total by the voltage of the circuit, usually 120 volts or 240 volts. 120 Volt, Conductor size (AWG or kcmil) Single Phase, Max 3% Voltage Drop*. Length of Run. 25'.The full name for this table is “Table 310.16 Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway, Cable, or ...9 Feb 2023 ... 310.3(A) [Minimum Size Conductors], the minimum sizes of conductors are 14 AWG copper or 12 AWG aluminum or copper-clad aluminum, except as ...Updated on February 8, 2024. According to the National Electrical Code (NEC), an 80 amp wire size is 4 AWG copper or 2 AWG aluminum wire gauge at 75o C (167o F) and within 100 ft. 1. To account for wire length, temperature, and voltage drops, you may need to increase the 80 amp circuit to a 3 or 2 AWG copper or 2 or 1 AWG aluminum or copper ...CONDUIT FILL TABLES – NEC TABLE C CONDUCTOR SIZE – AWG / kcmil – THHN / THWN. SIZE. 14. 12. 10. 8. 6. 4. 3. 2. 1. 1/0. 2/0. 3/0. 4/0. 250. 300. 350. 400. 500.9 Feb 2023 ... 310.3(A) [Minimum Size Conductors], the minimum sizes of conductors are 14 AWG copper or 12 AWG aluminum or copper-clad aluminum, except as ...So, a 250 kcmil wire is ideal for 200 amp. The size depends on how far you run the wires from the sub-panels to the main panels. The wire has to be at least 2 AWG thick. However, it also depends on the cable length. If you run a wire 200 feet away from the main electrical panel, use a minimum of 1-gauge copper wire.Jul 1, 2021 · New Table 310.12 for sizing dwelling unit services and main power feeders has a sixty-five-year history with the NEC Single-Phase Dwelling Services and Feeders For the 2020 NEC , a new dwelling unit service ampacity table was added at 310.12, and text added indicating table permitted to be used if there are no temperature correction or ... When it comes to electrical installations and appliances, safety should always be the top priority. One critical aspect of ensuring safety is choosing the right wire size for the a...Conductor sizes and corresponding diameters, area, and resistance can be found in NEC Chapter 9 on Table 8. You can also review the reprinted version in Chapter ...When it comes to purchasing new tires for your vehicle, understanding tire sizes is crucial. One of the key tools that can help you make an informed decision is a tire dimensions b...NEC Chapter 9 Table 4 is used to determine the dimensions and percent area of conduit and tubing. NFPA 731 Section 4.6.3.12 (2) requires raceways to be sized properly in accordance with the NEC ®. Raceways, conduits and tubing are not always used with security system wiring but if they are, the raceway conduit or tubing must be sized …Table 5 Dimensions of Insulated Conductors and Fixture Wires Type Size (AWG or kcmil) Approximate Diameter Approximate Area mm in. mm2in.2 Type: FFH-2, RFH-1, RFH-2, RHH*, RHW*, RHW-2*, RHH, RHW, RHW-2, SF-1, SF-2, SFF-1, SFF-2, TF, TFF, THHW, THW, THW-2, TW, XF, XFF When it comes to packing for a flight, one of the most important things to consider is the size of your carry-on bag. Every airline has its own restrictions on what size and weight...The software and spreadsheets below will make your job much easier, allowing you to shorten the time used for endless calculations of cables, voltage drop, various selections of circuit breakers, capacitors, cable size, and so on. Electrical Software and MS Excel Spreadsheets (Calculations of cables, voltage drop etc.)Jan 12, 2006 · An engineer gave me this chart for derating and the sizing of conductors feeding equipment in a machine room. Does Note d seem correct? IMO it is, providing there is not more than one outlet on the circuit. Any comments? Ampacity: THHN-90 Degree Column (Table 310.16) #12 30a #10 40a #8 55a #6 75a #4 95a #2 130a Jan 18, 2024 · And finally, we choose 12 AWG for the largest ground wire size selection. Our box fill calculator will immediately display that we need 14.25 volume allowances. And since our largest conducting wire is 12 AWG, our tool calculated the total box fill volume required of 32.06 in³ out of that wire size's required volume of 2.25 in³. As pros we can help advise on that. As a general rule all full size electric stoves or ranges require a minimum of a 40 amp power feed with a 50 amp receptacle 120/240 volts. The breaker size must be 40 amp and the wire size should be # 8 awg copper or # 6 awg aluminum. This applies for most plug in ranges with the oven below and burners on top ...Wire must not be sized merely for the ampacity, because there is less tolerance for voltage drop (except for very short runs). For example, a 1V drop from 12V causes 10 times the power loss of 1V drop from 120V. Use the following chart as your primary tool in solving wire sizing problems. It replaces many pages of older sizing charts. An engineer gave me this chart for derating and the sizing of conductors feeding equipment in a machine room. Does Note d seem correct? IMO it is, providing there is not more than one outlet on the circuit. Any comments? Ampacity: THHN-90 Degree Column (Table 310.16) #12 30a #10 40a #8 55a #6 75a #4 95a #2 130aStep 1: Determine the current drawn by the motor. As mentioned, the current drawn is 300 amps. Step 2: So, the wire size can be calculated as: 300 amps X 1.25 = 375 Step 3: …Calculating The Minimum Size Junction Box for Electrical Wiring. Wire in Electrical Box - Box Fill Calculations Part (1) of Section 370-16(a) describes in detail the method of counting wires, as well as clamps, fittings, or devices (i.e., switches, receptacles, combination devices) - by establishing an equivalent conductor-value for each. When it comes to electrical wiring, understanding the American Wire Gauge (AWG) system is crucial. This standardized system assigns a specific numerical value to wire sizes based o...Circuit Distance Calculator. Enter the information below to calculate the appropriate wire size. Note: The results of this calculator are based on conductor temperatures of 75°C. To calculate voltage drop based on circuit distance, use the Voltage Drop Calculator. To properly size wire for various applications, use the Wire Size Calculator to ...Nec ampacity charts for medium voltage cableNec cable chart article 310 Nec table 16 310 ampacity conductors allowable insulated chart motor rating wire service size 15b sizing rv feeder preparing jadeWire gauge chart amp amperage length wiring sub battery toyota 4runner size vs capacity charts wires feet selecting car power.NEC . Wire size for an 800 amp serice (paralled) Thread starter tadavidson; Start date Mar 30, 2017; Status Not open for further replies. ... year electrician who is now 49% owner in a GA. company that does a lot of work in NC at distribution hubs ask me about wire size to the service. I sent him to table 310.15 and the 75 degree …In the 2017 NEC ®, Section 310.15(B)(7) contained rules on calculating the conductor size for 120/240-volt, 3-wire, single-phase dwelling services and feeders. Back in the 2011 NEC ®, a simple table existed showing the service size on the left and the minimum size conductor required to supply the service on the right. The new version of the National Electrical Code ® (NEC ) 2020 includes Article 311 regarding Medium Voltage Conductors and Cable. This Article was This Article was added to improve overall usability of the NEC ® ; in the previous versions the ampacity tables for medium voltage cables were in Article 310 while the Our NEC Conduit Fill Chart calculates THWN and THHN wire fill for Schedule 40 and Schedule 80 PVC conduit pipe using conduit trade size and wire size and conductor size. Shop Elliott Electric Supply for wholesale electrical supplies, including schedule 40 PVC, schedule 80 PVC, THWN wire, THHN wire, and other electrical suppliesThree Phase AC (Isolated) These colors are used for multi-phase 277 & 480V in Canada. ORANGE = Phase 1 or Line 1 “L1”. BROWN = Phase 2 or Line 2 “L2”. YELLOW = Phase 3 or Line 3 “L3”. WHITE or GRAY = Neutral “N”. GREEN, BARE or …To calculate the load requirement for a circuit, first add up the wattage of all the electrical devices that will be on the circuit. Then, divide the total wattage by the voltage of the system, typically 120 or 240, and that will give you the required current or amps. Copper. Aluminum. Wire Gauge Size. 60°C (140°F) This is an NEC chart (you will find it below) that tells you what size copper or aluminum wire to use for different amp services. Example: What feeder wire size do you need for 200 amp service? Simple. You just check the NEC feeder sizing table and see that, for 200 amp service, you will need either a 2/0 AWG copper wire or 4/0 aluminum wire. Table 310.15(B)(17) provides ampacities for single insulated conductors in free air at 30°C ambient temperature. Both tables give ampacity values for copper and ...Ground Wire Size Table. Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of Equipment, Conduit, etc. Not Exceeding (Amperes) Note: View wire size charts from the list below. Maximum Allowable Ampacities for Conductors in Raceway, Cable or Earth (30°C) Maximum Allowable Ampacities for Conductors in Free Air (30°C) Maximum ...The number of devices connected to the circuit usually determines how much …Nec wire size chart18 lovely nec wire size chart Ampacity table necWire awg copper table chart gauge size nec metric diameter electrical ampacity sizes american cable vs wiring code sizing electric. 215.2(A)(1) Feeders.Correction Factors for Ambient Temperature From NEC Table 310.15(B)(1) Over 30° C, 86° F For Ambient Temperatures Over 30° C, 86° F, multiply the ampacities shown above by the appropriate factor show below: 15 Jun 2017 ... ... (NEC) for free to search for wire and conductor ratings. The NEC has tables with wire ratings, including 310.15(B)(16). Table 310.15(B)(16) ...This site offers many simple-to-use calculators and wire ampacity charts to aide you in properly sizing wire and conduit in compliance with the NEC. Visit the Calculators and Tables pages for a complete list of resources. Search Amazon for your Electrical products such as wire, tools, extension cords, and accessories. Wire Size Calculator The NEC offers various tables and charts that indicate conductor ampacity, temperature correction factors, and adjustment factors for different types of conductors and insulation materials. ... In summary, selecting the appropriate wire size based on ampacity involves referring to the NEC’s 310.16 table, considering ambient temperature ...CONDUIT FILL TABLES – NEC TABLE C CONDUCTOR SIZE – AWG / kcmil – THHN / THWN. SIZE. 14. 12. 10. 8. 6. 4. 3. 2. 1. 1/0. 2/0. 3/0. 4/0. 250. 300. 350. 400. 500.Note: These values are based on allowable ampacities of insulated conductors rated up to and including 2000 volts, not more than three current-carrying conductors in a raceway, cable, or Earth, single-insulated conductor in free air, and an ambient air temperature of 30°C (86°F).. Source: NFPA 70, National Electrical Code Table 310.15(B)(16-17)Obviously, the most useful part of the NEC 310.12 section is the conductor or wire size for 100A – 400A services or feeders. Here is the whole table: 310.12 Table For Wire Sizes …When it comes to electrical installations and appliances, safety should always be the top priority. One critical aspect of ensuring safety is choosing the right wire size for the a...An engineer gave me this chart for derating and the sizing of conductors feeding equipment in a machine room. Does Note d seem correct? IMO it is, providing there is not more than one outlet on the circuit. Any comments? Ampacity: THHN-90 Degree Column (Table 310.16) #12 30a #10 40a #8 55a #6 75a #4 95a #2 130aThe National Electrical Code (NEC) provides ampacity tables to help users select the appropriate wire size for their installation based on the wire’s current-carrying …Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually eliminated. Information taken from NEC Appendix C, Table C.9. Resource: NEC Conduit Fill Charts & Tables for ENT (Electrical Non-Metallilc Tubing) and Schedule 80 PVC ... Oct 9, 2022 · The National Electrical Code (NEC) 2022 updates has made it easier for electricians and do-it-yourselfers alike to use a wire size chart to get the correct information on wire sizes and amperage ratings. The wire size chart is divided into two main sections—the conductor size table and the amperage table. The conductor size table includes the ... Perhaps the most important thing you can do when sizing boxes is to make sure you understand the application. We mentioned you need to avoid applying NEC box sizing rules to signal cabling systems. Another aspect of the application is to understand the application environment. For example, will the box fit at the location you’ve selected for it?August 14, 2022 by Miss Clara. Wire Size Chart Nec 2022 provides a comprehensive guide to help ensure that electrical wiring installations are safe and compliant with the National Electrical Code (NEC). The chart is designed to help professional electricians and do-it-yourselfers alike determine the correct size of conductors required for ...Nec wire size chart18 lovely nec wire size chart Ampacity table necWire awg copper table chart gauge size nec metric diameter electrical ampacity sizes american cable vs wiring code sizing electric. 215.2(A)(1) Feeders.Click the “Calculate” button to obtain the recommended wire size in American Wire Gauge (AWG). Example: For instance, if the voltage is 120V, the load is …This site offers many simple-to-use calculators and wire ampacity charts to aide you in properly sizing wire and conduit in compliance with the NEC. Visit the Calculators and Tables pages for a complete list of resources. Search Amazon for your Electrical products such as wire, tools, extension cords, and accessories. Wire Size CalculatorRequired Wire Size: #0AWG (1/0 AWG) Cupper (#3/0 for Aluminum) based on the above calculation and AWG chart and tables based on NEC, the right size wire for 100 amp circuit at a distance of 100 feet from the main panel to subpanel is 1/0 AWG (AKA #0 AWG). It means, an the wire having ampacity of 150A is sufficient to deliver 100A to the the ...Updated on February 8, 2024. According to the National Electrical Code (NEC), an 80 amp wire size is 4 AWG copper or 2 AWG aluminum wire gauge at 75o C (167o F) and within 100 ft. 1. To account for wire length, temperature, and voltage drops, you may need to increase the 80 amp circuit to a 3 or 2 AWG copper or 2 or 1 AWG aluminum or copper ...(2) Wire Selection is based on table 310.16 (2020). The following additional NEC references should also be applied: The following additional NEC references should also be applied: *Section 240.4(D) Overcurrent Protection Limitations (unless otherwise specifically permitted elsewhere in the NEC NFPA70® Code, the overcurrent protection for Type UF, wet or dry, or corrosive locations. Types RHW, THW, THWN, USE, THHW, XHHW, wet or dry. ... Our NEC Conduit Fill Chart calculates THWN and THHN wire fill for Schedule 40 and Schedule 80 PVC conduit pipe using conduit trade size and wire size and conductor size. Shop Elliott Electric Supply for wholesale electrical supplies, including schedule 40 PVC, schedule 80 PVC, THWN wire, THHN wire, and other electrical suppliesNow, If you see in the AWG wire size chart and NEC Table 310-15B (16) Article 310.60 (given below), the right size for 20 amp circuit is #12 AWG. Example 2 – (240V and Distance Involved) Find the Proper wire size for 2,400 W load circuit supplied by 240V at a distance of 100 feet? Solution:The National Electrical Code (NEC) is a comprehensive set of electrical standards and regulations that ensures safe practices in electrical installations. Within this code, there a...15 Jan 2020 ... Cable size Circuit breaker amp size How to calculate What cable. How2D2 ... Ampacity Table, NEC 2020 - [310.15], (13min:26sec). MikeHoltNEC•55K ...The Code considers the neutral conductor a current-carrying conductor only when it carries the unbalanced current from other ungrounded phase conductors. When circuits are properly balanced, the …Dec 13, 2023 · Input the load in amperes. Specify the distance the wire will cover in feet. Click the “Calculate” button to obtain the recommended wire size in American Wire Gauge (AWG). Example: For instance, if the voltage is 120V, the load is 10A, and the distance is 50 feet, the calculator will provide the corresponding wire size based on NEC standards. This is known as NEC 80% requirement for wire sizing. In the case of 200 amps breakers, this means you will need a wire with at least 250A ampacity to connect a 200 amp service. Looking at the AWG wire chart, you will need an even bigger than #0000 AWG wire for 200 amps. You have to go beyond the AWG chart at look at the KCMIL wire chart.Circuit Distance Calculator. Enter the information below to calculate the appropriate wire size. Note: The results of this calculator are based on conductor temperatures of 75°C. To calculate voltage drop based on circuit distance, use the Voltage Drop Calculator. To properly size wire for various applications, use the Wire Size Calculator to ...From this NEC wire ampacity charts, we see that we need either. 1 AWG copper wire for 125 amp service. This wire has 130A ampacity; more than the minimum required 125A ampacity. ... This wire has 135A ampacity; more than the minimum required 125A ampacity. Note on 125 amp breaker wire size: For breakers, we use the 80% NEC rule. That …SRML Motor Lead Wire. SRML wire is a high-temperature wire that may be used as motor lead wire for hazardous locations. Depending on its conductor size, this wire can be rated to either 150°C or 200°C, but it has an overall voltage rating of 600V. It can also be used as a lead wire for electrical equipment in high-temperature environments.The NEC tap rule in 240.21 (B) (3) allow transformer primary conductor sizing down to 1/3 of primary circuit breaker trip, but only when primary plus secondary conductors are not greater than 25'. P petersonraTable 5 Dimensions of Insulated Conductors and Fixture Wires Type Size (AWG or kcmil) Approximate Diameter Approximate Area mm in. mm2in.2 Type: FFH-2, RFH-1, RFH-2, RHH*, RHW*, RHW-2*, RHH, RHW, RHW-2, SF-1, SF-2, SFF-1, SFF-2, TF, TFF, THHW, THW, THW-2, TW, XF, XFF This site offers many simple-to-use calculators and wire ampacity charts to aide you in properly sizing wire and conduit in compliance with the NEC. Visit the Calculators and …486A-486B, Standard for Safety-Wire Connectors, pro-vides torque values in the absence of manufacturer’s recommendations. Informational Note No. 3: Additional information for …When it comes to purchasing new tires for your vehicle, understanding tire sizes is crucial. One of the key tools that can help you make an informed decision is a tire dimensions b...8 Feb 2022 ... Ampacity Table, NEC 2020 - [310.15], (13min:26sec). MikeHoltNEC•55K ... Understanding ampacity and temperature rating of different wire.When it comes to purchasing new tires for your vehicle, understanding the tire size chart is crucial. The tire size chart provides valuable information that helps you make informed...The gutter size is calculated based on the roof area and the expected rainfall intensity. The formula to calculate gutter size is: Gutter Size (inches) = (Roof Area in square feet × Rainfall Intensity in inches per hour) ÷ (3,600 × Drainage Coefficient) The drainage coefficient is a value that represents the fraction of rainfall that will be ...A 100amp service requires a minimum wire size of #1 AWG. Long cable runs would see an increase in wire size. Section 310-15 of the NEC is used to determine wire size, including ref... | Coeijrpbiw (article) | Mdsfqjo.