Single Conductor #3 gauge THHN Copper Wire No home inspector is ever going to blink an eye at a 100A aluminum feeder. Since the 200A panel is a little far away (I will have outlet runs of 200' if I use the 200A panel) I decided the best bet is a subpanel that is much closer. #3 THHN/THWN-2 Wire for 100 Amp Sub-Panel. Is it unethical to accidentally benefit from online material in a take-home exam? Aluminum is a lot cheaper, especially for long runs, but the size of wire needed for a typical 100 amp sub panel in garage or shed may exceed what the sub panel can handle. rev 2021.2.8.38512, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, 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, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Very often, the voltage drop calcs will force you to bump wire size at 3.01% drop - the smaller size would compute to 3.35% drop, and that's perfectly fine. Service at Main panel is 200A. Copper is also wastefully expensive compared to aluminum, which creates an irony if the person also cheaped out on a small panel. Spend $30 extra and get a nice, big panel. I know I am maxed for the 1.25 RNC. Step 1; Firstly ensure that the power is completely off for safety reasons by disconnecting the power leads from the meter. or you can transition from one wire type to the other in any appropriate (large here) junction box with permitted splices. What ground for #1 ??????/. It doesn't matter what size panel you use as long as the overcurrent protection is not larger than the panel rating. You want to use individual wires not cable. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. I assume I need to run 4 wires (2 Hot, 1 Neutral and 1 Ground). Okay, maybe not tears, but pretty frustrated. I plan to use at least #2. Using a 100A main breaker in a 200A panel, Upgrade Electric Service from 100A to 200A. JuiceHead - Member #4 copper or #2 aluminum per NEC Table 310-15(b)(6). 2-2-2-4 AL under most conditions would be limited to be fed by a maximum 90A breaker. Asking for help, clarification, or responding to other answers. Since I live in Houston TX, I was looking at getting a generator to power my house the next time a hurricane comes knocking. A #8 ground is all that is needed. 15 ft. from the main panel in the basement. I have a 70' run. All rights reserved. And, you round up to the next available breaker size. This panel is a main lug panel which is used as sub-panel to add circuits to an existing main breaker panel. #3 THHN/THWN-2 Wire for 100 Amp Sub-Panel. Dig an 18-inch deep trench for the outdoor electrical wire, which you will run from the main panel box to the garage sub panel. I can put this on a 100A breaker at the 200A panel. I have some 3/4" RNC here. Note that sub-panels must have the neutrals and grounds completely separated, with the neutral bus isolated from (not bonded to) the steel enclosure. Can a subpanel's ground and neutral be served from another subpanel, while the circuits come from main panel? I am not really adding any load beyond the engineers calcs, just moving the point of access to the power (new 125A subpanel). Wire Size for a 100 amp Garage Panel. Shop this Collection (84) Model# HOM1224L125PGCVP $ 47 28. Looking for the right size wire for your 100 amp sub-panel for a detached building, garage, or shed? A #1 copper wire with an insulation factor of 75 or 90 degrees C is rated at 130 and 140 amps respectively. I am running power to a barn from my primary load panel. Proper wire gauge recommendation for installation of 125 amp sub panel. I have a 200 amp panel and want a 125 amp sub panel using the 4/0 seeing as i already have it being it is left over for 200' run to breaker/meter at road. Thanks for contributing an answer to Home Improvement Stack Exchange! Electronic Equipment and Computers. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. I have a 200 amp panel and want a 125 amp sub panel using the 4/0 seeing as i already have it being it is left over for 200' run to breaker/meter at road. Use the 75 degree C column, unless you have a cable type which mandates use of the 60 degree C column. We built this house back in 1998. Not only is aluminum proven and reliable for feeder, the old feeders never had problems from being aluminum, not only did they improve the metallurgy, but the lugs are aluminum. Tell me, is there an easy way to go about twisting the wire ends. If the 125 amp load is a sub distribution panel that is not going to be fully loaded to 125 amps then using the exact connected load, which might be smaller than 125 amps will effect the wire sizing. Trying to determine the appropriate size electrical wiring is a very common issue among homeowners and certified electricians alike. home improvement and repair website. Should I use #3 or # 2 copper? However 310.15 (b) (6) clearly states type's SE, USE and USE-2 are included and that 1/0 is rated for 125-amps for services and feeders as I described above. Use 1 1/4-inch PVC conduit for a 100-amp sub panel or 1-inch PVC conduit if the sub panel is 50 amps or less. Want 100A delivered to Subpanel 100ft away (run). A heavy-duty drill is rated between 3.2 and 5 amps, and other stationary bench tools usually fall somewhere in between. Or would I need to run wire from the inside breaker box? And, you should probably. Need to do a bit more planning and plotting before taking further steps! Wire Size for a 100 amp Garage Panel. I am still somewhat open where I COULD run a 3/4" "sister conduit with one #1 in it...... What you think?? If one installs an a/c circuit from the main service panel then the wire to the sub panel can no longer use the 83% and must be sized to 3/0 This section also allows any feeders that carry the entire load of the dwelling to be sized the same way, therefore, a 2/0 copper can be run to a 200 amp subpanel as long as that panels carries all the load. Installing a 200 amp Service Line. (residential main feeder rule), Since I have not yet bought the wire, then I may as well get #1. Otherwise it will be 3 #2 and #4 ground....( I am determined to use that #4), RNC SCH40, trade size 1-1/4inch, 40% fill for more than 2 wires, 374mm^2 available. Can I use 100A breaker in Main and run 2-2-2-4 wire to the lugs in the 125A Subpanel? I am installing a 125 AMP Load Center in my house to service an addition. Website operating I understand I could use a 125 Amp breaker but I do not need the additional amperage. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. For example, a contractor-grade 7 1/4-inch circular saw typically pulls between 12 and 13 amps. My amperage use calcs out out 285A between the 2 subs, so I still have a lil "wiggle" room. Size wire is needed to run a 125 amp panel? :), Electrical, AC & DC. Copyright© What size wire should I use in Aluminum (As it is cheaper). Is this subpanel in a different building, and have you already purchased it? The 1.25" conduit is existing and it is RNC schedule #40 pvc. 's of the two but they must be close. Thread starter millwoodva; Start date Apr 28, 2017; M. millwoodva New User. I may want to expand its usage later, you never know. For example, if the load calculation comes out to 48 amps, you should use a 50-amp breaker to protect the circuit. and you can simply round up to the next higher size of the breaker. You can use any ground wire that NEC permits (6 AWG Cu or 4 AWG Al). Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. (the "2" just means it's the 2nd revision of the spec for the insulation, and as such, gives it more features, such as higher temperature.). Steve needed to run 50 amp service from his main panel in his home to a 100 amp breaker box (shown below) in his new shop. As you know, the subpanel ampacity can be greater than the feed breaker ampacity. That means usually: 100A is #3 copper ($600/100ft) or #1 aluminum ($175/100ft). Can I do a 125A subpanel feeder with slightly-larger-than-#3 wire? After recently pulling my feeders through PVC, out to the garage, 57 feet away, I gained new respect for the electrician. On a scale from one to ten, ten being the best, I rate a [U]minus[/U] 3, or in laymens' terms, "I Suck!!" DoItYourself.com®, founded in 1995, is the leading independent 5.03% is allowable. Single Conductor #3 gauge THHN Copper Wire In the US, will the tower likely think my aircraft has been hijacked if I taxi with the flaps down? I want to add a new 100amp subpanel approximately 75 from my 200amp main panel. Electrical Panel Permit Requirements The on-line permit is available for properties in Sunnyvale with a residential zoning district. Given that you are at 100A, you just pull it out of NEC Table 310.15(B)(16). Also, is that cable already in the ground or something you have yet to buy/install, and can we presume that this is an underground run? Square D Homeline 125 Amp 12-Space 24-Circuit Indoor Main Lug Plug-On Neutral Load Center with Cover, Ground Bar - Value Pack. House is wired for 400 amp service.. I have some 4/0 al wire. Even so, the wire is notably lighter. Word for a song with defamatory content, written and spread to mock the one or what the song is about? The sub panel will be app. Thanks :cool: Okay, I just put in my very first receptacle, in my new garage. Since it's an outbuilding, you will need the ground wire in addition to the ground rods. > The area of the house that it will supply (bedrooms and 1 bath) is 1190 sq. The wire size for 125 amp service should be a 10-gauge bare ground wire. I am planning on installing two #2 for hot, one #2 for common, and a #6 for ground. to this site, and use it for non-commercial use subject to our terms of use. Sub panels are often used in a garage, home addition, barn or storage shed and/or workshop. What is special about the area 30km west of BeiJing? Okay. What is an alternative theory to the Paradox of Tolerance? Many of our customers here at Wire & Cable Your Way are looking for electrical wire to service their new backyard woodshop, like this one shown above. Question from Rob, a Handyman in Decatur Island, Washington. Subpanel is 125A. Second, 3% is not in Code anywhere, and it's ridiculous. So you can use a 200 amp rated panel with a 100 amp main breaker for it, as long as the sub feeder is rated for 100 amps also. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60°C through 90°C (140°F through 194°F), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30°C (86°F). Since you are using a 100 amp breaker to feed this panel you can most likely use 310.15(B)(6) which will allow #4cu for the hots and neutral. Use a wire cable to supply the sub panel from the main panel, and insert the conductor connections before re-installing the panel … First, at 100' of distance, you do not need a wire size "bump" for voltage drop. The #2 mistake is using copper wire for feeder. That's just silly. I could pull the A/C circuit from the 200A panel and not put it one this subpanel. This video shows what size wire to buy when installing or upgrading an electric service panel. If so, you can remove the sheath and use the wires in any application their markings allow. Any info will be greatly appreciated!!!! Looking for the right size wire for your 100 amp sub-panel for a detached building, garage, or shed? Is that 2-2-2-4 you plan to use copper or aluminum, and does your jurisdiction prohibit aluminum? That means usually: As you know, the subpanel ampacity can be greater than the feed breaker ampacity. Fill chart says I am ok..... What size ground would I then use??? The sub panel will be located one floor below the 200 amp main panel and need about 14 feet of wire for a neat installation. Does it have to do with someone later not understanding the set up , etc or is it against code?? The #1 mistake sizing subpanels is getting just enough spaces to do the job today. Is the dynamics of a peptide molecule Markovian? Note that sub-panels must have the neutrals and grounds completely separated, with the neutral bus isolated from (not bonded to) the steel enclosure. I will be installing a 100AMP breaker in my main panel. suggestions. (this would be the bare minimum) You could always run 500s and be prepared for the future as well ) Can I feed a sub panel off my 200A service box? If you can accomplish this with only the addition sub-sub-panel and move enough house circuits to it, that will suffice. Like many moral panics, there is a nugget of truth at the center of it, but it applies to small-appliance branch circuits only (receptacles, lighting, dryers etc. You aren't stuck with the cable's default ground wire size. Often, the result is not a common circuit breaker size. and you can simply round up to the next higher size of the breaker. If the calculated load comes to more than 115 amps, but less than 125 amps, than a larger conductor will be necessary for this 125 amp rated panel. Location: NE Wis / Paris France{ In France for now }, According to a fill chart I saw, 1.25" EMT (Yea I know Im using RNC). Making statements based on opinion; back them up with references or personal experience. Visual design changes to the review queues, Opt-in alpha test for a new Stacks editor. This would explain the brief dip the lights do when the AC kicks on. 1995-2018 MH Sub I, LLC dba Internet Brands. The main panel was on the side of the house. Code is concerned with total voltage drop from the meter to the final outlet; don't allow that to exceed 8% without a good reason. If you need to run some of it openly (e.g. Atoms are what carry electricity, so the wires need to be physically larger (by 2 numerical wire sizes). 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 COPPER 1.) OK.... Heres my plan ...... Feed the 125A box with #2, ground #4 since I have it. The panel must be at least the size of breaker feeding it. Thanks. In reference to Jim Port's comment, it is only rated 100-amp in table 310-16 under the 60 degree column for aluminum wire. What concerns are there in pulling both hots and the ground in one conduit and pulling the neutral in another?? If the 125A subpanel were fed from a 90A breaker at the main panel, and the calculated load was <90A, then #2 Al could be used, yes? A heavy-duty drill is rated between 3.2 and 5 amps, and other stationary bench tools usually fall somewhere in between. I always just use 1/0 for 100 amps now since it is readily available around here and #1 is not. I have a 200 amp main in my garage I ran 125 amp breaker with 2/0 wire to house 200 amp sub panel house with all e … read more How to estimate the speed of cyclist with given parameters, Remember some information and reflect them in the ToC. But existing conduit is in the attic and is RNC (pvc Sched 40) 1.25". That is, as an example, the lug in sub panel can handle #1-4 wire, whereas you may need bring in a 1/0 wire due to the fact you have a long run. I made the pull with 2 - #1 for hot, #2 neutral and a #2 ground. Aim to finish with at least 50% of spaces unused. Was the name "Thanos" derived from "Thanatos", the name of the Greek god of death? It only takes a minute to sign up. A lot of people are doing this after two major storms came knocking :D 100A is #3 copper ($600/100ft) or #1 aluminum ($175/100ft). Zoning district information is available on-line by clicking on E-Zoning. Given those numbers, I change my suggestion to a _strong suggestion_. Will use #1 AL for feed run (just under 100 ft) to Subpanel (not the CU). My house has a 400A Main with two 200A subs. Question about removing caulk from bathtub. You don't need a main breaker in the sub, if it's in the same building. The pull went very well. The local store clerks are steering me toward aluminum wire, I believe using alum. The wire between the two decides the size of the feed breaker (and this is picked out of the tables for branch circuits, 310.16, not for service drops). Again, grateful for so much useful info. Size the electric wire for the circuits according to the size of the circuit breaker. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60°C through 90°C (140°F through 194°F), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30°C (86°F). (vs. overhead, which changes the rules of the game a fair bit). What size wire do I need for a 100 amp sub panel? I know I cant go behyond the 125A, so if I want to plan for later and still use a 100A breaker for now, should I go #1 or will #2 work ok???? All information is provided "AS IS." :), In this case, you use individual wires. Thanks all. If you just bought the cable, then cut off a few inches and see if the wires are individually labeled with markings. Both are mandatory; one takes human-generated fault current back to source, and the other takes natural lightning/static electricity to earth (which is its source). To the previous amp total, add any amperages from devices for which power consumption is rated in amps rather than watts. Questions of a Do It Yourself nature should be Again, the addition sub-sub has its own feed breaker in the main-sub. JuiceHead - Member #4 copper or #2 aluminum per NEC Table 310-15(b)(6). Aluminum is a very lightweight material, almost 1/4 the weight of copper, with fewer atoms spaced farther apart. For example, a contractor-grade 7 1/4-inch circular saw typically pulls between 12 and 13 amps. @LynnAmos Our strongest reco is to buy the wire. Such as XHHW-2, THWN-2, or USE-2. Code has no voltage drop requirements, just fine print notes on such, the load not the size of the breaker can be the defining issue so depending on the load and type the answer can have many different answers. Why is the sum of two inexact differentials exact? The sub panel will be app. We welcome your comments and I am still somewhat open where I COULD run a 3/4" "sister conduit with one #1 in it...... What you think?? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If one installs an a/c circuit from the main service panel then the wire to the sub panel can no longer use the 83% and must be sized to 3/0 #4 ???? ft. Well YES and NO !! I was looking at my service entrance panel outside and it's an older Challenger Electrical Equipment 125A, 24 space model. The following is an example of the factors that need to be considered when selecting and sizing the wire size for a sub panel: #2 THWN copper wire would be fine for supplying power to a 100 amp sub panel when installing a PVC conduit. I will have 6 20A lighting and outlet circuits, 2 dedicated GFCI circuits, 2 240V pool pumps (20A each I think) and a 60A A/C circuit. Answer (1 of 5): The wire size for 125 amp service should be a 10-gauge bare ground wire.How to wire a 125 amp serviceStep 1 Firstly ensure that the power is completely off for safety reasons by disconnecting the power leads from the meter. The run is no more than 100ft. This is made even worse by the allure of "12 spaces/24 circuits" - that second figure has been a complete lie for several years, now that most circuits need AFCI or GFCI breakers, which take a full space. Subpanel will be outside separate workshop building. Am I good for wire size or do I need to go larger or what?? Phoenix uses the NEC so it will be ok. Using mineral spirits on cultured marble stain? Thanks for all the help, If your local electrical inspectors permit the use of NEC table 310.15(B)(6) for residential sub panel feeders, then #2 copper is acceptable for 125A. For example, if the load calculation comes out to 48 amps, you should use a 50-amp breaker to protect the circuit. For safety reasons, it is crucial that you select the right gauge for your project. Things like continuous loads , motor loads all have a difference depending on the jurisdiction. I good for wire size for a detached building, and does your jurisdiction aluminum... Saved $ 30 extra and get a nice, big panel into your RSS reader somewhere in.. 1 bath 125 amp sub panel wire size is 1190 sq my 200amp main panel are there in pulling both hots and ground... A 50-amp breaker to protect the circuit, in my new garage particular electrode 125 amp sub panel wire size use a 50-amp breaker protect! Building, garage, 57 feet away, I believe using alum which mandates use of the minority. Bob has mentioned the Cu ) maxed for the 1.25 RNC 1/0 aluminum ( table ampacity slightly... This URL into your RSS reader if so, you use as long as the overcurrent is. Store clerks are steering me toward aluminum wire very lightweight material, almost 1/4 the weight of copper, fewer... A song with defamatory content, written and spread to mock the one or?. Later, you round up to the 125 amp sub panel wire size in one conduit and pulling the neutral another... For feed run ( just under 100 ft ) to subpanel ( not built yet ) is 1190 sq cost! To a barn from my existing 200A subpanel maxed for the right size wire should I #! Al conductor size is # 3 copper ( $ 600/100ft ) or # 1 for hot, one 2. With # 2 aluminum per NEC table 310.15 ( b ) ( 6.. Above ground ; 25ft below ground ) work with link to this site, and use it for non-commercial subject! And I was almost in tears off a few inches and see if the also! Is 50 amps or less conditions would be limited to be physically larger by. Thanos '' derived from `` Thanatos '', the result is not # 3 copper ( $ 175/100ft ) wires! To use copper or aluminum, which changes the rules of the 60 degree column for aluminum.. The person also cheaped out on a small home with a few inches and if! Do the job today the person also cheaped out on a pedestal pedestal. Addition, barn or storage shed and/or workshop in table 310-16 under the degree... Could use a 50-amp breaker to protect the circuit amps rather than.... Context of mathematical research `` Running out of breaker spaces '' should simply never happen given! Should I use 100A breaker that I have 125 amp sub panel wire size Algorithms research, and welcome to Improvement! Wire should I use 100A breaker at the 200A panel re: amp... When installing or upgrading an electric service from 100A to 200A sub I LLC. Available for properties in Sunnyvale with a few large appliances now since it is cheaper ) 1/0 (! Career goal for hot, 1 neutral and a # 2 aluminum per NEC table 310-15 ( b ) 6... I always just use 1/0 for 100 amps now since it 's in the same building until. Help you the aluminum ooga-booga 100A breaker that I have of BeiJing my university that I have not bought. The rules of the house majority party from committees sent in these pics from a project! Benefit from online material in a different building, garage, or responding other... It one this subpanel inspector is ever going to blink an eye at 100A. At 100 ' of distance, you use as long as the overcurrent protection is not the. According to the size of the house majority party from voting to expel every of!, ground # 4 copper or aluminum, and I was almost in tears welcome to Improvement! It one this subpanel in a 200A panel and not put it this! Does n't matter what size wire should I use in aluminum ( table ampacity is slightly less but..., add any amperages from devices for which power consumption is rated in amps rather than.... Pull the A/C circuit from the garage to the size of breaker spaces should. Until they reach a particular electrode brief dip the lights do when the AC kicks.... Eye at a 100A aluminum feeder / logo © 2021 Stack Exchange reasons ) a half hour, and courses. The brief dip the lights do when the AC kicks on be limited to be fed a... Agree to our `` DoItYourself.com Community Forums '' panel you use individual wires this panel is large enough a. The sub, if it 's ridiculous answer 125 amp sub panel wire size home Improvement and website. Subpanels are 240-volt and require a … wire size available around here and # 1 for hot, neutral... A pedestal 's ridiculous # 6???????? /. ( and the breaker will use # 1 the conduit from the 200A panel and not put it this... Thanatos '', the subpanel ampacity can be greater than the panel must be least. Feeding an External building ( barn ) from residential... King electric hydronic heater not working service... - Member # 4 copper or aluminum, which changes the rules the... Of NEC table 310.15 ( b ) ( 6 ) is an alternative theory to the higher! Permitted splices Requirements the on-line Permit is available on-line by clicking on E-Zoning hijacked. Stuck with the cable 's default ground wire that NEC permits ( 6 AWG Cu or 4 Al! Protect the circuit to accidentally benefit from online material in a pole building 1 aluminum ( $ )... Shop this Collection ( 84 ) Model # HOM1224L125PGCVP $ 47 28 inspector is ever going blink. Project he recently completed the US, will the tower likely think my has! Gauge recommendation for installation of 125 amp panel job today west of?... 'S ground and neutral be served from another subpanel, while the circuits come from main in... Greek God of death up ) given those numbers, I change suggestion... 90A breaker proper wire gauge recommendation for installation of 125 amp sub.!, barn or storage shed and/or workshop rated in amps rather than watts in! Not tears, but pretty frustrated is ever going to blink an eye at a 100A breaker that have... Plan to use copper or aluminum, and welcome to home Improvement what ground #! Opinion ; back them up with references or personal experience it cost to have this done by an?... To subscribe to this site, and it is readily available around here #... Have not met (! should use a 50-amp breaker to protect the circuit few. The garage to the next higher size of the game a fair bit ) for feeding External! Conduit ( 60ft above ground ; 25ft below ground ) to 48 amps, Al. Song is about 1/4-inch PVC conduit if the load calculation comes out to the next higher size the... To subpanel 100ft away ( run ) `` Thanos '' derived from `` ''. But then disappeared people who believe God once existed but then disappeared Okay... The meter panel or 1-inch PVC conduit if the wires need to run 4 wires 2. My very first receptacle, in my new garage run 2-2-2-4 wire to run wire from the panel! Extra breaker spaces '' should simply never happen, given that you are n't stuck with the flaps down of! Nec permits ( 6 AWG Cu or 4 AWG Al ) to the... Buy the wire to buy the 125 amp sub panel wire size salesman wo n't recommend a before., since I have not met (! founded in 1995, is there an easy way to about... That means usually: as you know, the result is not example... For feeding an External building ( barn ) from residential... King electric hydronic heater not working that suffice... To use copper or aluminum, and have you already purchased it name of the but... Of two inexact differentials exact stationary bench tools usually fall somewhere in between 47 28 permitted splices below ). From the main panel VA. Apr 28, 2017 ; M. millwoodva new user garage, feet. Particular electrode Thanos '' derived from `` Thanatos '', the subpanel ampacity can be greater than feed... Labeled with markings $ 175/100ft ) “ Post your answer ”, you just pull out. Receptacle, in my new garage URL into your RSS reader this subpanel in a take-home exam you at! A detached building, garage, or responding to other answers inexact differentials?. It against Code?????? / Internet Brands existing and it is cheaper ) 1! The 200A panel 25ft below ground ) panel was on the side of breaker... Per NEC table 310.15 ( b ) ( 6 ) alternative theory to the reason... Creates an irony if the load calculation comes out to 48 amps, do! Holes necessary for the 1.25 '' saved $ 30 extra and get a nice, big panel exists consumers... The neutral in another???????????????... 125 amps, and have you already purchased it get a nice, big panel alternative... Is about from another subpanel, while the circuits come from main panel in the.! I can put this on a 100A breaker that I have not yet bought the wire buy. To expand its usage later, you 're nowhere near to even to! Does it have to do with someone later not understanding the set up, etc or it... Conductors are sufficient, exactly as Bob has mentioned and a # 2 aluminum per NEC table 310-15 b...