Wire size for 200 amp service copper

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Cerro Wire, PowerStream Technology and Armstrong’s Supply Company’s websites are some online resources that provide wire size vs. amps charts. Cerro Wire provides a chart of differ...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...May 5, 2024 · The size of wire required for a 200 amp service panel is 4/0 AWG. This is also sometimes referred to as “4 gauge” wire. This wire size will be able to handle up to 200 amps of power before it needs to be replaced. Be sure to use copper or aluminum wire that is rated for outdoor use when running the wire from the main power source to the panel. For a 100 amp service, many electricians opt for wire size #2 or #1 AWG aluminum or copper-clad wiring. This is because aluminum conducts electricity slightly differently than copper. I know it can be a bit confusing, but the main takeaway for aluminum wire size is generally to go a size up (meaning a lower number on the gauge) …The best size of wire for 150 amp is 1 AWG copper or 2 AWG aluminum or copper-clad aluminum. If the temperature is around 194°F, use a 3 AWG aluminum wire gauge. The size of the wire should be around 1-1/4th inch wide. The right size for hot and neutral wires is 1 AWG copper or 2 AWG aluminum. For the ground wires, it is 6 AWG copper or 4 AWG ...

If you apply the NEC 80% rule, 250 kcmil wire can handle up to 204 amps. That’s why it is considered a 200 amp wire. Basically, we are trying to answer what ground wire do you need for 200 amp service. If you consult the copper ground wire size chart above, you can see that you will need a 2 AWG copper ground wire to adequately ground a 250 ...May 5, 2024 · The size of wire required for a 200 amp service panel is 4/0 AWG. This is also sometimes referred to as “4 gauge” wire. This wire size will be able to handle up to 200 amps of power before it needs to be replaced. Be sure to use copper or aluminum wire that is rated for outdoor use when running the wire from the main power source to the panel. Example: A 120/240-Volt, 3-Wire, single-phase electrical service for a single-family dwelling with a calculated load (from Article 220) of 98 amps, supplied by THWN copper overhead service entrance conductors. A 100 amp electrical service will be used to supply the 98 amp load for the single-family dwelling. 100 amps X 83% = 83 amps. This is ...Mar 29, 2021 at 1:36. 2. I won't stake my life on this so it's a comment. The 200 amp service can be derated to .83 so that's 166 amps. At 75 degrees C, 3/0 Al is 155 amps and 4/0 Al …310.15 Ampacities for Conductors Rated 0–2000 Volts. (B) Tables. (7) 120/240-Volt, Single-Phase Dwelling Services and Feeders. For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, service and feeder conductors supplied by a single-phase, 120/240-volt system shall be permitted be sized …Select wire size: Select conductor type: Choose maximum voltage drop (%): Calculate Reset. Results; Maximum Circuit Distance-Voltage Drop-Voltage at Load-Note: The results of this calculator are based on conductor temperatures of 75°C. Source: NFPA 70, National Electrical Code, Chapter 9, Table 8. To calculate voltage drop based ...

For underground 200 amp service, the wire should be 2/0 AWG. The size of the wire you require will vary according to the voltage and amperage of the service. Generally, the aluminum wire should be 4/0 AWG. Steel armored wire of #2 AWG or greater should be fitted to a 200 amp underground utility box.Get free shipping on qualified 200 Service Entrance Wires products or Buy Online Pick Up in Store today in the Electrical Department. ... Total Wire Length (ft.) 250 ...Generally, the ground wire size for a 200 amp service ranges from 2 AWG to 8 AWG. The best one is 2 AWG for copper wire and 4 AWG for aluminum or copper-clad aluminum wire. It is recommended to use them with 1.5-2.5 inches schedule 40 or 80 PVC conduit for underground service. It may differ depending on the materials, permission rules, codes, etc.Having the right wire size for your 200 amp service is crucial for safety and efficiency. In this section, we will discuss the recommended wire sizes for copper and aluminum wires, as well as how distance and voltage drop considerations play a role in your selection. Copper Wires: #2/0 AWG Copper. For 200 amp service using copper wires, it is ...The size of the ground wire for a 200-amp service depends on various factors, including local electrical codes and specific installation conditions. However, as a general guideline, a copper grounding conductor of 4/0 AWG (American Wire Gauge) or an aluminum conductor of 250 kcal is often recommended.

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The wire size for AMP service is broken down in the following very useful chart. According to the table above, a 100 amp service necessitates a wire size of around 1.25 inches. Copper is used on wire #4, while aluminum is used on wire #2. The optimal size for larger conductors to maintain the fill level inside the conductor is 1.5 to 2 inches.Wire Size for 100-Amp Service. Most 100-amp service panels require #2 AWG wire. Electricians use these wires when there’s significant space between the circuit breaker panel and electrical equipment (such as air conditioners), which is common in large commercial buildings. You’ll need to use #4 AWG wire if the distance between the …Min. Wire Ampacity (100 ft away) = 125A × 1.2 = 150 Amps. That means that we need a wire with at least 150 ampacity to deliver 100 amp service 100 feet away. 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. That means that #0 AWG wire is the perfect size ...At the company we use 2/0 Aluminum wire for a 150 amps service and 4/0 for 200 amps services. Does this mean that the terminations at the meter are rated for 90 C degrees? ... be loaded to 180 amps and protected by a 200 amp device. with a load of 181 amps you will need to increase conductor size but can still have the 200 amp device. …Roughly speaking, the NEC 310-16 requirement states that for a 200 amp copper or aluminum wire, you have to add 20% to the total amps for every 100 feet of distance. Example: Let’s say you want to use 200 amp service 100 feet away from the sub panel.Jan 6, 2010. #8. 200 amp commercial service i forgot to mention that i am coming from a meter/disco outside and hitting a panel about 50 ft away.Looking at table 310.16;for copper-4/0 and for aluminum 300's.

Whether copper (no, just no) or aluminum, larger wire costs more. 200A requires either 4/0 aluminum (if the entire service feed to the main panel is 200A) or 250 kcmil. But you could power, typically, EV charging, a decent size heat pump, lighting and a whole bunch of power tools with a lot less.1 AWG copper wire for 125 amp service. This wire has 130A ampacity; more than the minimum required 125A ampacity. 2/0 AWG aluminum wire for 125 amp service. 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 means that a 125A …Jan 15, 2024 · The ordinary code of wire to use for a 200 amps service panel is #2/0 copper wire that needs to have a conduit of 2 inches. The electric code of your country may also set the bar for utmost safety. For aluminum or copper-clad wire, there shall be a wire with a gauge of #4/0 AWG. The MCM rating would be 211.60 kcmil. The wire size for a 100 amp service depends on the distance between the electrical panel and the power source. According to the NEC, the minimum wire size for a 100 amp service is #2 AWG copper or #1/0 AWG aluminum. However, this may not be sufficient for longer distances, as voltage drop can occur. It’s important to consult a …For 100amp service, bond enclosure with #6 bare copper. For 200amp service, bond enclosure with #4 bare copper. For 400amp service, bond enclosure with #2 bare copper. 2. Ground wire between meter enclosure ground lug and ground rod shall be continuous with no splices. 100amp 200amp 400amp Residential Overhead Service …Jan 6, 2010. #8. 200 amp commercial service i forgot to mention that i am coming from a meter/disco outside and hitting a panel about 50 ft away.Looking at table 310.16;for copper-4/0 and for aluminum 300's.250.66 is for the GEC not the neutral, however art. 250.24(C)(1) does reference that the grounded conductor not be smaller than the required GEC in Table 250.66. That being said unless you can calculate the neutral load and determine a #4 is satisfactory I would not do this. I generally downsize one wire size for the neutral.When looking for a 200 amp service entrance wire size, you should consider the 3% allowable voltage drop by NEC standards. As a result, you need to use a much bigger wire size than the one for short-distance setups. In this case, instead of using a 2/0 copper wire, you should use 300 kcmil copper with only a 2.78% voltage drop.

Allowable ampacity of 3/0 copper wire is 225 Amp, while the allowable ampacity of 4/0 aluminum wire is 205 Amp. 2/0 AWG copper wire is not completely out of the question, but its ampacity is 195 Amp-200 Amp, which will put it at a maximum load, so using 3/0 AWG copper is a better option. For grounding conductors, the minimum size for is 4 AWG ...

@Tom, See this article for wire size for long runs: ELECTRICAL SERVICE ENTRY CABLE SIZES FOR LONG WIRE RUNS. On 2021-06-05 by Tom . 200 amp service 135 feet length what size teck cable would I need. On 2021-05-13 by danjoefriedman (mod) @Bill, At the WIRE SIZE & AMPACITY TABLES You'll see #8 copper wire is rated for 40 Amps As …The neutral wire has a size requirement too like the other wires. The neutral wire size for 200 amp service is #2/0 if you are using copper wires. The copper wires have better conductivity, are flexible and long-lasting. So, if you do not want much trouble with your service, copper wires are the safest bet.For 100amp service, bond enclosure with #6 bare copper. For 200amp service, bond enclosure with #4 bare copper. For 400amp service, bond enclosure with #2 bare copper. 2. Ground wire between meter enclosure ground lug and ground rod shall be continuous with no splices. 100amp 200amp 400amp Residential Overhead Service …For a 200 amp breaker, the minimum recommended wire size is 2/0 AWG copper or 4/0 AWG aluminum. However, 3/0 AWG copper wire is a better option since it has higher maximum ampacity (200-225 amps). This ensures that the wire can safely handle the maximum current load of the breaker, without overheating or posing a fire …Pre-Cut Length. The Southwire Company 250 ft. 4/0-4/0-4/0-2/0 AL SER Service Entry Electrical Cable is designed to be used as a panel feeder in multiple unit dwellings. This Cable can be used in wet or dry locations at temperatures up to 90˚C or 194˚F. Cable assembly and reinforcement tape jackets are made of sunlight-resistant, gray PVC.A grounding wire ranging from 2AWG to 8 AWG is recommended for a 200-amp service. 200 Amp Ground Wire Size. Copper Wire: Aluminum Wire: 8AWG: 6AWG: 4AWG: 2AWG: 6AWG: 4AWG: 2AWG: 4AWG: You can use 8AWG (Copper) or 6 AWG (Aluminum) grounding wires for a 200-amp service. You can also use copper conductors of 4AWG …Get free shipping on qualified 200 Service Entrance Wires products or Buy Online Pick Up in Store today in the Electrical Department. ... Cable/Wire Type. SER. Mobile Home Feeder. Conductor Material. Aluminum. Copper. Max Amps. Not Specified. 30. 50. 75. 95. 100. 125. 150. 200. 205. 315 ... copper service entrance wires.

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October 9, 2023 by GEGCalculators. The size of the ground wire for an electrical circuit depends on the circuit’s amperage rating. Common ground wire sizes for copper conductors include 10 AWG for 20-50A circuits, 8 AWG for 60-100A circuits, and 6-4 AWG for larger circuits. Always follow local electrical codes and consult a professional for ...we just did a church that had a 200 and a 400 disconnect feeding 2 panels on the inside. the plans called for a 2/0 to building steel and a 2/0 to water pipe and a #6 to ground rod. the building was wood framed and incomming water was plastic. we placed 2 ground rods (1 at each disconnect) run a 2/0 to each disconnect from the ground rods and connected the ground rods together with 2/0 cadweldCopper gutter guards are a worthy investment, but how do you decide on the best ones? Our guide breaks down the best copper gutter guards to choose from. Expert Advice On Improving...The Wire Size Calculator below will calculate the proper wire size for a circuit based on circuit amps, preferred (or available) wire insulation, conductor type and installation specifications. For more advanced considerations, use the Wire Size Calculator or the Advanced Wire Size Calculator.For underground 200 amp service, the wire should be 2/0 AWG. The size of the wire you require will vary according to the voltage and amperage of the service. Generally, the aluminum wire should be 4/0 AWG. Steel armored wire of #2 AWG or greater should be fitted to a 200 amp underground utility box.The minimum wire size is a 4/0 AWG 200 amp service aluminum wire or a 2/0 AWG copper. If we’re going to use an aluminum triplex cable for a single-phase setup, we will need a 4/0 AWG size neutral for 200 amp service, 2 4/0 AWG sizes for hot wires, and at least a 4-AWG bare copper wire for the ground.Application. Southwire® Type SE, Style SER service entrance cable is primarily used to convey power from the service drop to the meter base and from the meter base to the distribution panelboard; however, the cable may be used in all applications where Type SE cable is permitted. SER may be used in wet or dry locations at temperatures not to ...350 kcmil. 3 inch. 500 kcmil. 400 Amps. 450 kcmil. 3 inch. 600 kcmil. The table above explains the wire sizes for 200 Amp service at 300 ft distance. But the wire size for 100 amp service at 150 feet is drastically different.Occupation. Electrician. Jul 7, 2020. #3. 4/0 AL is good for 180 amps. 250 AL is good for 205 amps. If you can show your calculated load is less than 180 amps, you can legally go up to the next standard size, a 200 amp breaker. That's code minimum. Over here, we would use 250 AL in a 2.5-3" depending on which size we felt like using. ….

When looking for a 200 amp service entrance wire size, you should consider the 3% allowable voltage drop by NEC standards. As a result, you need to use a much bigger wire size than the one for short-distance setups. In this case, instead of using a 2/0 copper wire, you should use 300 kcmil copper with only a 2.78% voltage drop.Generally, the ground wire size for a 200 amp service ranges from 2 AWG to 8 AWG. The best one is 2 AWG for copper wire and 4 AWG for aluminum or copper-clad aluminum wire. It is recommended to use them with 1.5-2.5 inches schedule 40 or 80 PVC conduit for underground service. It may differ depending on the materials, permission rules, codes, etc.Minimum Requirements For 200 Amp. AWG or American Wire Gauge is the standard for sizing electrical wiring. A 200 amp service requires either #2/0 AWG copper wire or #4/0 AWG aluminum or copper-clad aluminum wire. These are the safest wires to use as they permit the use of full amperage of the electrical service without too high a voltage drop. What Size Grounding Wire is Required for a 200 Amp Service? A grounding wire ranging from 2AWG to 8 AWG is recommended for a 200-amp service. You can use 8AWG (Copper) or 6 AWG (Aluminum) grounding wires for a 200-amp service. You can also use copper conductors of 4AWG and aluminum conductors of 2AWG. Jan 6, 2010. #8. 200 amp commercial service i forgot to mention that i am coming from a meter/disco outside and hitting a panel about 50 ft away.Looking at table 310.16;for copper-4/0 and for aluminum 300's. The Wire Size Calculator below will calculate the proper wire size for a circuit based on circuit amps, preferred (or available) wire insulation, conductor type and installation specifications. For more advanced considerations, use the Wire Size Calculator or the Advanced Wire Size Calculator. A 400 Amp service panel and 400 Amp meter base require a 750 kmil (750 MCM) 0r 1000 kcmil (1000 MCM) aluminum wire at 194°F or only 1000 kcmil (1000 MCM) at 167 °F. For copper wire, you will need 600 kcmil (600 MCM) copper wire for both 167 °F and 194°F. For a 140 °F underground service, 1250 kcmil aluminum and 750 kcmil …Shop Southwire 2-2-2-4 Stranded Copper SER By-the-foot in the Service Entrance Cables department at Lowe's.com. Primarily used to convey power from the service drop to the meter base and from the meter base to the distribution panelboard.Square D Homeline 200 Amp 40 Es 80 Circuit Main Breaker Plug On Neutral Load Center Value Pack In The Bo Department At Lowes Com. Breaker Box Safety How To Connect A New Circuit Diy Family Handyman. Single Family Dwelling Electrical Services Rated 225 To 600 Amps. Circuit Breaker Wiring Diagrams Do It Yourself Help Com.They’re not cheap; they’re $50 over the new AirPods Pro. But if you’re a Bose fan, you can pick them up starting September 15. Yes, I missed Bose’s big news this morning. I was bus... Wire size for 200 amp service copper, Wire Size & Amp Ratings. Download Ampacity Chart PDF: Ampacity Chart. Understanding Ampacity: Ampacity refers to the maximum safe current a conductor can carry …, The size of the ground wire for a 200-amp service depends on various factors, including local electrical codes and specific installation conditions. However, as a general guideline, a copper grounding conductor of 4/0 AWG (American Wire Gauge) or an aluminum conductor of 250 kcal is often recommended., What Size Copper Wire for 200 amp Service You Need On average, you need a 2 AWG (American Wire Gauge) copper wire for a 200 Amps service if the distance is more than 50 feet . AWG (American Wire Gauge), Allowable ampacity of 3/0 copper wire is 225 Amp, while the allowable ampacity of 4/0 aluminum wire is 205 Amp. 2/0 AWG copper wire is not completely out of the question, but its ampacity is 195 Amp-200 Amp, which will put it at a maximum load, so using 3/0 AWG copper is a better option. For grounding conductors, the minimum size for is 4 AWG ..., What Wire Size Works Best for 200-Amp Service? If you plan to install or upgrade a 200-amp electrical service panel, you can choose between copper or …, On top of that, we will also calculate the 150 amp wire size for service 50 feet, 100 feet, 150 feet, 200 feet, and up to 500 feet away from the source. ... Case and point: Let’s express CM from the equation above and calculate it to determine the copper wire size for 240V 150 amp service 200 feet away with an allowable voltage drop of 3% ..., What size wire do I need for a 200 amp service? For a 200-amp service, you typically need copper wire sized at least 2/0 AWG (American Wire Gauge) or aluminum wire sized at least 4/0 AWG for the service entrance conductors. However, this can vary depending on local electrical codes and the length of the run, so consult a …, The size of the ground wire you need for a 200 amp service will depend on several factors, including the length of the wire run, the type of wire you are using, and the specific requirements of your local building code. In general, a 200 amp service will require a ground wire that is at least 2/0 copper or 4/0 aluminum or copper-clad aluminum ..., Generally, the ground wire size for a 200 amp service ranges from 2 AWG to 8 AWG. The best one is 2 AWG for copper wire and 4 AWG for aluminum or copper-clad aluminum wire. It is recommended to use them with 1.5-2.5 inches schedule 40 or 80 PVC conduit for underground service. It may differ depending on the materials, permission …, Choosing the right size wires for your sub panel is a matter of safety. It varies for several reasons, but you generally need 1 AWG copper wire for a 100 amp sub panel. Whether it be copper or aluminum, let’s take a look at what size wire you need for a 100 amp sub panel that’s 200 feet away. For amateur craftsmen, building a new structure ..., Whether copper (no, just no) or aluminum, larger wire costs more. 200A requires either 4/0 aluminum (if the entire service feed to the main panel is 200A) or 250 kcmil. But you could power, typically, EV charging, a decent size heat pump, lighting and a whole bunch of power tools with a lot less., Two-inch conduits are used to hold the copper and aluminum wires for 200-amp electrical service. In addition, a #4 bare copper conductor is used for the connection between the ground rod/plate and the neutral connection block of the distribution panel for a 200-amp service. A 165- to 200-amp fuse is used on the service entrance wire at the …, A 50 amp sub panel will require at least 3 to 6 AWG wires. Here, I considered the distance around 55 feet. If the distance is longer, I suggest you use thicker and lower gauge wires. If the sub-panel distance from the main panel is 150 or 200 feet, you can use 4 AWG copper or 3 AWG aluminum or copper-clad wires., Alright, figuring out what size you need for 90 amp service is fairly certain. We will have to consult the NEC 310.16 table for copper and aluminum wire capacities.On top of that, we will have to account for voltage drop if we want to have a 90 amp service 50, 100, 150, 200 feet away, and so on.. We’ll start by looking at the typical 90 amp wire gauge., Apr 11, 2018 · 310.15 Ampacities for Conductors Rated 0–2000 Volts. (B) Tables. (7) 120/240-Volt, Single-Phase Dwelling Services and Feeders. For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, service and feeder conductors supplied by a single-phase, 120/240-volt system shall be permitted be sized in ... , Jul 28, 2023 · A 50 amp sub panel will require at least 3 to 6 AWG wires. Here, I considered the distance around 55 feet. If the distance is longer, I suggest you use thicker and lower gauge wires. If the sub-panel distance from the main panel is 150 or 200 feet, you can use 4 AWG copper or 3 AWG aluminum or copper-clad wires. , The best size of wire for 150 amp is 1 AWG copper or 2 AWG aluminum or copper-clad aluminum. If the temperature is around 194°F, use a 3 AWG aluminum wire gauge. The size of the wire should be around 1-1/4th inch wide. The right size for hot and neutral wires is 1 AWG copper or 2 AWG aluminum. For the ground wires, it is 6 AWG …, In this video, we show you how to properly install a New 200 amp power/electric service underground from the closest power pole to the garage. We show you st..., 4 AWG copper wire is used for 80 amp service. This wire has 85A ampacity and can handle 85 amps, more than the required 80 amps. ... Here is what size wire we need for an 80 amp circuit 200 feet away at a 3% allowable voltage drop: At 12V, we need a 1250 kcmil copper wire. Voltage drop is very significant at lower voltages, hence a very thick wire., Each has a different ampacity for a specified gauge size, and these ampacities are found in NEC® Table 310.15(B)(16) for the calculations in this app. For example, 3/0 AWG copper has an ampacity of 200 amps at 75℃, while 3/0 AWG aluminum has an ampacity of 155 amps at 75℃. WIRE / CABLE TYPE:, The size of the conduit needed for a 200-amp service will depend on the length of the wire run. Generally, you should use 3/4 inch or 1 inch conduit for up to 100 feet and one 1 1/4 inch or larger for longer runs. Always consult a professional electrician or check with your local permit office before beginning any electrical wiring project., Allowable ampacity of 3/0 copper wire is 225 Amp, while the allowable ampacity of 4/0 aluminum wire is 205 Amp. 2/0 AWG copper wire is not completely out of the question, but its ampacity is 195 Amp-200 Amp, which will put it at a maximum load, so using 3/0 AWG copper is a better option. For grounding conductors, the minimum size for is 4 AWG ..., Choosing the right wire for 200 amp service is a matter of safety. The wire that you use for 200 amp service depends on the material, and you’ll need #4/0 wire if it is aluminum. Whether it be copper, copper-clad, or aluminum, let’s take a look at what size wire you need for 200 amp service., A 400 Amp service panel and 400 Amp meter base require a 750 kmil (750 MCM) 0r 1000 kcmil (1000 MCM) aluminum wire at 194°F or only 1000 kcmil (1000 MCM) at 167 °F. For copper wire, you will need 600 kcmil (600 MCM) copper wire for both 167 °F and 194°F. For a 140 °F underground service, 1250 kcmil aluminum and 750 kcmil …, Wire Size for 100-Amp Service. Most 100-amp service panels require #2 AWG wire. Electricians use these wires when there’s significant space between the circuit breaker panel and electrical equipment (such as air conditioners), which is common in large commercial buildings. You’ll need to use #4 AWG wire if the distance between the …, Example: A 120/240-Volt, 3-Wire, single-phase electrical service for a single-family dwelling with a calculated load (from Article 220) of 98 amps, supplied by THWN copper overhead service entrance conductors. A 100 amp electrical service will be used to supply the 98 amp load for the single-family dwelling. 100 amps X 83% = 83 amps. This is ..., Align breakers with wire size: 15 amp for small, 20 amp for medium, 30 amp for large. Install a 15 amp circuit breaker to receive 120 volts from the bus bar's left side. Fit a 30 amp two-pole breaker for 240-volt service to larger appliances like a clothes dryer, ensuring connection to both sides of the panel. Grounding the System:, Electricians installed aluminum wiring in new houses during the 1960s when there was a shortage of copper, but the practice was discontinued because aluminum overheats. The U.S. Co..., A 50 amp sub panel will require at least 3 to 6 AWG wires. Here, I considered the distance around 55 feet. If the distance is longer, I suggest you use thicker and lower gauge wires. If the sub-panel distance from the main panel is 150 or 200 feet, you can use 4 AWG copper or 3 AWG aluminum or copper-clad wires., A #2/0 AWG copper or #4/0 AWG aluminum wire size is sufficient for 200 amps. The 200 amp wire size you need will increase the longer the distance run to account for voltage drop. What’s the Estimated Cost to Upgrade a Panel, For a 200 amp electrical service, a 2/0 AWG copper wire or 4/0 AWG aluminum or copper-clad aluminum wire is needed. This choice meets the National Electrical Code (NEC) requirements. Upgrading to a 200 amp service involves understanding not just wire sizes but also the importance of following electrical codes., Jul 23, 2019 · @Anonymous, Please take a look in the table "Copper SEC Wire Size for Long Runs for 200A Service" at the top of this page. On 2021-04-05 by Anonymous . what size wire for 200amp 140 foot run underground . On 2021-03-22 by danjoefriedman (mod) - What size service entrance cable do I need for a 100 amp service and a 150 ft. run? , For a 100 amp service, many electricians opt for wire size #2 or #1 AWG aluminum or copper-clad wiring. This is because aluminum conducts electricity slightly differently than copper. I know it can be a bit confusing, but the main takeaway for aluminum wire size is generally to go a size up (meaning a lower number on the gauge) compared to copper.