We do the "400 amp service" also with 2 200 amp panels and a 320 amp meter base. I seen some run 1 #4 to both panels for the water pipe ground. I have also been told you need to run 2 #4 (1 to each panel) or 1 1/0 to both panels. They said you had to add the conductor area together (2 3/0). When I try the math I get 2 3/0=.2790x2=.4580That said, a 400-amp service will give you a lot more flexibility. You can have two good sized 200 amp panels in different parts of the house, Each panel will hold around 40 breakers. This allows more runs, and shorter runs from the panels to the outlets and other devices. Shorter runs mean less voltage drop that means less heat generated …This article is made for informational purposes of 400 amp service with 2 200 amp panels only. Its recommended, to seek advice from field experts. Skip to content. Menu. Home; Guide; ... Bring the 1-0 ground over to the other panel by bringing it into one 200 amp panel and combining it with another 400 amp service.Sep 18, 2014 · There may be no exception by your AHJ but the Code allows a lot of possibilities: 250.104 covers the bonding of "other metal piping systems" which would include the gas pipe. #3 would be correct for a 400 amp circuit, however, the section goes on to say the pipe only needs to be bonded using the rating of the circuit likely to energize the pipe.I have a 3000 amp service with 8 sets of 500. They aren't service entrance conductors with a neutral, so there needs to be a ground. The engineering on this has me worried for reasons I won't go into. The one-line shows a #1 ground in each set. I think it should be 1/0 but I'm not sure. I am told that I am wrong because its a parallel run.400 amp service/ grounding and bonding. peco are bringing direct burial wires underground to my meter socket, I am going pipe into the bottom of my 320 meter socket. I then will have 2 200 amp disconnects one on left of meter socket and one on right, I am going to have a double lug in my meter and run 4/0 to my disconnects, then from my ...Ground Wire Size For 320 Amp Service 31 Oct 2023. Installing 200 amp meter pole for mobile home. what size wire for a 80 Meter amp socket milbank 200 wiring diagram ground 400 base two double disconnects service electrical electric main revised wps manual Water service (grounding)i have just finished roughing in a new 7500 foot house and i am preparing to ground the 400A service. i am uncertain about the wire size for the cold water GEC. here are the basics...main panel has two (2) 200A main breakers, separately fed from the meter side of the all-in-one, side-by-side panel. one feeding the main panel and one feeding a MLO subpanel in the attatched garage. the cold ...The ground wire in a 100 amp service is designed to provide a safe path for electrical current to flow in the event of a fault or short circuit. How do I determine the proper size of ground wire for a 100 amp service? The size of the ground wire for a 100 amp service depends on the type of wiring used and the distance between the electrical ...For a 400 amp service with aluminum, aim for a 1,000 kcmil wire. And for the ground, a 1 AWG aluminum wire should do the trick. So here’s a quick recap for you: …Mar 25, 2021 · 800 amp feeder you want to use #3/0 which is a 200 amp conductor 800/200=4 sets. Switch to 600 kcmil which is a 420 amp conductor 800/420=1.9= 2 sets. In your example you want to use 2 sets for 400 amps that means that each set needs to have an ampacity of 400/2=200 amps or minimum size of #3/0.The words “service-entrance” were removed from NEC Table 250.66. Table 250.66 Grounding Electrode Conductor for Alternating-Current Systems. ... ground pipes, ground plates, concrete encased electrodes and ground rings may be permitted to be smaller than the values in Table 250.66 according to Section 250.66(A) through (C).A pair of paralle 1/0's will give you an ampacity of 520, and that is the smallest size you can use to get a total of 400 or higher. You can put them in one conduit, even if the run were longer than 24 inches. The 90C rating of 1/0 copper is 260. Putting 6 current-carrying conductors in one conduit, and derating to 80%, gives you an ampacity of ...Apr 7, 2022 · While there are many factors that go into making sure that the ground rod is properly sized, the size of the rod itself is the most important factor. By understanding what size ground rod is needed for a 400 amp service, you can ensure that your home is safe and sound. Service Entrance 100amp To 200 Code Questions.The method to establish a base minimum size for the grounded (neutral) conductor hasn't really changed, spoiler alert, but at the least easier to understand. The reference is now 250.24 (D) for sizing grounded conductors, and 250.24 (D) (2) specifically for our Two or More Raceways or Cables installations.250.50 Grounding Electrode System. All grounding electrodes as described in 250.52(A)(1) through (A)(7) that are present at each building or structure served shall be bonded together to form the grounding electrode system. Where none of these grounding electrodes exist, one or more of the grounding electrodes specified in 250.52(A)(4) throughdwe11ing 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 accordance. with 31 0.15 (B) (7) (l) through (4). (l) For a service rated 100 through 400 A, the service. conductors supplying the entire load associated with a.Re: 600 amp service grounding electrode conductor sizing the GEC is sized using table 250.66 based on largest service entrance conductors. But, for sizing the GEC to a ground rod, then you use 250.66(A). See also 250.52(A)(5)(b). If you're using Concrete-encased electrode (UFER) then, GEC not required to be bigger than #4, …I have a service disconnect panel with a utility meter for an 800A, 480V, 3 Phase service. This is an old warehouse where this new service panel will be installed at a location much further from the existing service which will be removed. I am looking at the NEC 250 section, but not sure what type grounding I should recommend.2 Answers. Sorted by: 2. YES you can use #4 Al as your ground. Your 1AWG Al is good for a 100 AMP feeder (actually 110). From NEC 250.122 this requires …service conductors must be bonded in accordance with the National Electrical Code. • A water line shall not be the sole means of grounding. 10. When either lightning rods or telephone ground rods are within 6 feet of the service ground, they must be bonded together with #6 stranded copper wire with approved clamps. 11.Ground electrode conductor shall be connected to the grounding electrode system Rating of service disconnect based upon largest fuse or trip. 18-27-240.21; 18-27-430.28 Service or feeder neutral shall be the maximum unbalanced load. Grounded conductor shall be the same size as 400 Amp. Or less ungrounded conductors 18-27 …200 amp ground wire size chart 400 amp service Advice for a typical 400 amp residential service. Amp service 400 residential typical disconnect electrical panels two advice switches. Practices for grounding and bonding of cable traysAmp panel service main distribution nachi grounding nec bbsystem 400 amp service ground wire sizeGoing to 400 amp ...Single Family Residential Electrical Services | NFPAGenerally, 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.200 amp ground wire size chart 400 amp service Advice for a typical 400 amp residential service. Amp service 400 residential typical disconnect electrical panels two advice switches. Practices for grounding and bonding of cable traysAmp panel service main distribution nachi grounding nec bbsystem 400 amp service ground wire sizeGoing to 400 amp ...A. AMPED Discussion starter. 110 posts · Joined 2010. #1 · Aug 23, 2014. I am going to be installing a 400 amp over head service to a commercial building that rents out storage units. I plan on using a 400 amp singe phase meter main combo to supply 2 200 amp 40 space MLO panels.GROUNDING (Refer to 500.01 Ameren Service Manual) All standard services that operate below 1000 volts as defined in Section 400 shall contain a grounded neutral conductor. A non-standard service that operates below 1000 volts as defined in Section 400 may have a grounded phase conductor used as a circuit conductor in the system.SIZING OF GROUNDING ELECTRODE CONDUCTORS (Table 250.66) Aluminum or Copper-Clad Aluminum 100 amps #8 AWG #6 AWG 150 amps #6 AWG #4 AWG As a result, what size ground do you require for a 100 amp service? In general, a 100 amp circuit’s ground conductor must be at least # 8 AWG copper. Also, do you know what …Re: 400 amp service with 2-200 sub panels As for a better way of grounding. Having main bonding jumper father away from the service panel is not a better system useing 230.40 exception #3 will allow the main bonding jumper to be where it is needed at the house this will allow for a faster operation of breakers in the event of a ground fault since you wont have the long run to the meter disconect.Firstly, lets get the terminology straight because it is confusing. A 200 amp service has a 200 amp meter base that is rated 160 amps for continuous load but rated 200 amps for non-continuous loads. A 400 amp meter base is rated 400 amps non- continuous loads and 320 amps (80%) for continuous loads. So the service you are installing is a 400 ...Providing i go with 400 amp service correct me if I'm wrong, but it would be 400kcmil copper in a 3" conduit, or 600kcmil aluminum. in a 3-1/2" conduit. Would you guys typically derate the neutral for that? Also, if I'm coming into the 400 amp main in the middle of a field, the only ground required at that location would be a #4 to ground rods?Three hinges are required for doors from 36" through 72" high. Four hinges are required for doors over 72" high. Hinge pins must be stainless steel and 5/16" diameter minimum. Switch compartments must have a window built with safety glass or equivalent for easy viewing of switch status by a person of normal height.Hover Image to Zoom. $ 604 28. Pay $554.28 after $50 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. Ring Style Uni-Pak. Contains two to six 125A and 225A breaker positions. For use in small apartment or professional / commercial buildings. View More Details.Therefore, you will need to use 400 AWG ground wire. 400 amp 3 phase service: For 400 amp 3 phase service, you will need a minimum of 600 kcmil-gauge wire. Before you upgrade to a 400 amp service, you will need permission from your electrical service provider. In some cases, you may also need to pay some upfront fee for the upgrade.Voltage Rating. 600V AC. UNSPSC. 39121501. Country of Origin. USA (subject to change) Product Description. These grounding kits connect safety switches to the ground to dissipate excess electrical current to the earth. They help protect against shorts that can damage downstream equipment and cause electrical shock.Electrician: Randy. for service entrance.... according to table 250.66 in the NEC, 1/0 copper is the proper grounding electrode conductor size when the service enterance conductor size is between 350-600 kcmil or equivalent for parallel runs. your parallel 3/0 ungrounded conductors that your are using has an equivalent circular mil area of 350 ...What Is The Ground Wire Size For 400-Amp Service? The correct ground wire size to use for a 400-amp service typically depends on the gauge cable used for the panel. Assuming that the service panel uses a 700 kcmil copper wire, a ground wire that can handle 5,000 amps should suffice.SINGLE PHASE, THREE WIRE 400 AMP SERVICE A. GENERAL NOTES: • Service entrance line and load conductors, conduit straps, weatherhead, lock nuts, bushings, connectors, and miscellaneous mounting hardware furnished and installed by customer. • Installation available for services greater than 200 amperes but less than 320 amperes continuous.Sep 30, 2004. #7. Re: 400 amp service Since each of these panels is service equipment, each has a "grounded service conductor" and also has the grounded/grounding bus bonded to the service enclosure. Per 250.53 (D) (2), you can bond at any of these locations: "The supplemental electrode shall be permitted to be bonded to the grounding electrode ...Whether you’re welding or working in a power plant, the ability to calculate three-phase power can prove handy. Read on to learn more about converting three-phase power to amps. An...At the meter the feeders emerge in PVC out of the ground 4ft and at the house they extend into the basement in PVC 10ft. ... I generally find the simplest and least expensive way to do a 400 amp service is to use 230.40 Ex 2 and bring two 200 amp sets from the meter to two 200A main breaker panels.The 800 amp is a service heavy-up from 400 amp and the new service is relocating from one side of the house to the other. All 4 200 amp sub-panels will be located close to 260' away from the service disconnects. -feed out of disconnects with 4/0 SER to 200 amp sub-panels 260' away on the other side of house (sucks).4 AWG copper ground wire for 200 amp service (at short distances). 0 AWG aluminum ground wire for 200 amp service (at short distances). Now, this is relevant is the hot wire is short. If you need a 200 amp service 50 feet, 100 feet, 150 feet, or 200 feet away (Example: 200 amp sub-panel 100 feet away), you also need to account for voltage drop.How to install a 200 amp underground service on a building or dwelling or wherever. If you have any questions just leave a comment and I will try to get back...September 25, 2023 by GEGCalculators. The size of an electrical subpanel depends on the total amperage of the circuits it will serve. Common residential subpanels are 100-amp or 200-amp, but they can vary. Consult with a qualified electrician to accurately determine the appropriate subpanel size based on your specific electrical needs and local ...The Siemens 400 Amp 30-Space 42-Circuit Combination Meter Socket and Main Breaker Load Center has a ring-type meter and is intended for use in underground service applications. The unit features a factory-installed, 200 Amp main breaker with a provision for a field-installed, 200 Amp maximum main disconnect (disconnect not included).Only thing I can think of other than a mistake is it is a service with multiple service disconnects which would allow the wire to be sized to the load (in that case it shouldn't really be called an 800 amp service but if it was a panelboard with an 800 amp bus one might call it an 800).Underground service laterals are difficult and costly to change. The Company emphasizes the need to size the cable to allow for future load additions. 19. Company Pole Replacements or Relocations. If the pole from which a residential underground service (400 Amp or below) originates is replaced or relocated,Electrical - AC & DC - 400 amp service with two 200 amp disconnects - I have a new 400 amp service on a shop. The meter base, with double lugs, is 15' from the shop. i plan to put the two outdoor 200 amp disconnects on the outside of the shop. I also have two 200 amp breaker panels for inside, one is 20' from theA 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 copper cables are ...Jan 31, 2015. #2. We have no control over what the power company does but they are responsible to provide adequate power to the building. IMO, they ran a very small wire for the size of the service and the distance. Of course service size doesn't necessarily mean much it is the load that counts.Example: calculated load is approximately 325A per ungrounded conductor. One opts for a 400 amp service [disconnect]. The ampacity of the service entrance …Figure 6-2 Typical Service-Termination Enclosure, Combination Meter-Socket Panel for a Class 320 Meter (Residential, 120/240-Volt, 226-Amp Through 320-Amp Service) (PDF, 3.9 MB) Figure 6-3 Underground Combination Meter and Current-Transformer Cabinet (201 Amps-400 Amps, 1Ø or 3Ø) (PDF, 3.9 MB)The panel is on the back of the house. I spoke with the electrician, and he wants to use 2 grounding rods. One will go directly underneath the panel and he wants to put the other in the front of the house. Now, I know the 2 grounding rods have to be at a minimum 6 feet apart, but is there a maximum length the rods can be from one another?150 Amp Wire Gauge Charts for 3% and 10% voltage drop. We have calculated wire sizes needed for 150 amp service 50, 100, 150, 200, 300, 400, and 500 feet away at 12V, 120V, and 220V voltages with an allowable voltage drop of 3% (1st chart) and 10% (2nd chart). Just off the bat: We can just read the 150 amp wire size (at 0 feet, very important ...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. It's crucial to consult your local ...the service disconnecting means shall be installed in bathrooms. tvo 3/0 avg black conductors to main breaker vhite or marked vhite conductor td neutral bus 1/0 bare copper to grounding bus bonding jumper or bonding screv panel on riser rigid or strap 3 inch te metal conduit 400 amp meter base should be 5 ft. to 5-1/2 ft. above ground level to350 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 ...Nov 29, 2012. #2. Based on 2008 250.66 (B) Connections to Concrete-Encased Electrodes. Where the grounding electrode conductor is connected to a concrete-encased electrode as permitted in 250.52 (A) (3), that portion of the conductor that is the sole connection to the grounding electrode shall not be required to be larger than 4 AWG copper wire.Jan 11, 2007. #2. In our area the power company is responsible for the power to the meter base and it is often much smaller than the service size would allow under the NEC. But the power company is responsible for it and if there are problems, it is there troubles, not ours. You can only get meter bases rated 325 amp, otherwise you have to have ...A. AMPED Discussion starter. 110 posts · Joined 2010. #1 · Aug 23, 2014. I am going to be installing a 400 amp over head service to a commercial building that rents out storage units. I plan on using a 400 amp singe phase meter main combo to supply 2 200 amp 40 space MLO panels.Some areas require a CT cabinet for 400 amp services. CT= current transformers. These devices read the current being used on larger loads. Aorund here we use the 320 amp meter base for a 400 amp service. A 200 amp is rated 160 amp continuous and 200 non continuous. A 400 amp base is the same 400 amp noncontinuous and 320 continuous.The head of Ukraine’s security service says that the mobile phones of Ukrainian lawmakers are under attack by equipment located in Russian-controlled Crimea. That’s not terribly su...Ok to try and clarify this more. I work with a solar company and we sold a generator a year ago for a 400 amp service. Single panel with outside disconnect and meter traveling 120' inside to a 400 amp panel. It has a 22kw generator. I misspoke earlier and said 30 kw. All the material was ordered prior to my start for the company.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. It's crucial to consult your local ...7.2.1 Sockets shall meet all specifications in 1.11 above. 7.2.2 The right line side location of the 320 amp socket box shall be provided with a reduced jaw. 7.2.3 Meter sockets shall be supplied with a label designating "Use 320 Amp Meter Only". 7.2.4 Bypass shall be of the manual, jaw release, lever type.On a 400 amp service. What size wire do you need for grounding the Check Details 400 Amp Meter Base Wiring Diagram - 2 - Installing 400 amp meter base Check Details 400 Amp Service(Meaning, Price, Installation, Troubleshooting Check Details Generac 400 Amp Transfer Switch Wiring Diagram - Wiring Diagram Pictures Check DetailsJul 23, 2013. #1. Hello All, I'm working on wiring up a restaurant (building built in 60's or 70's) remodel that has an existing 600 AmpZinsco service. 5 feet away from that main service there was ("was" because the plumbers relocated it) a 2" water pipe that stubbed out from which there was a 1" conduit carrying a wire that bonded to that pipe.ALUMINUM SERVICE DROP 1-800-945-5542 www.PriorityWire.com Code Word Phase Conductors Bare Neutral Messenger Completed Cable Ampacity** Size Strand Insulation Thickness Size Strand* Breaking Strength Diameter Weight XLP 90˚C Poly XLP Poly 75˚C AWG/kcmil inches AWG/kcmil lbs inches lbs/kft lbs/kft amps ampsThe 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.I am looking for some help in grounding and bonding a service I am doing.The service in question is a 400 amp 3 phase 4 wire overhead service 120/208volts. My question is where do I tie my grounds into? I am driving 2 ground rods and bonding building steel, also Iam going to hit the main water pipe upon entering the building.Aug 23, 2007. #1. We have a 3000 amp 208/120 volt service. It starts at the POCO's pad mount transformer then to an outdoor CT enclosure. From there it goes under a slab to a 3000 amp MCB switchboard. It has 8 sets of 4-500 kcmil feeders. We use Table 250.66 which says to use a 1/0 for each service feeder. Since the CT enclosure is before the ...phase 240 150ft from house do to power company and tree issues. He ran 2 runs of Wesleyan cable I believe 350/350/4/ to the 2-200 amp panels at house underground service.There are 2 ground rods at safety switch 5ft apart and tied into neutral there and also 2 ground rods at house for 2 200 amp panels.What is the minimum grounding electrode conductor size for a 200 amp service? Per Article 250 of the NEC , The minimum size for a grounding conductor for a circuit protected by a 200 amp breaker is #6 copper or #4 Aluminum. This conductor may need to be increased in size for any of several reasons, including the length of the run, available ...Link to Panels:https://www.amazon.com/gp/product/B000BQS6XG?&_encoding=UTF8&tag=duckriverhome-20&linkCode=ur2&linkId=96579c00128d7ef4b6a27aec3f6a1a6e&camp=17...May 7, 2017 · Njelectric said: Currently have a job that is requiring a 400A 3-phase 480v service. The disco is rated at 400A and the connected load is going to be 260A. Normally, I'd parallel 3/0 conductors in two conduits. Problem is, as stated in the title, I only have one 4" pipe and from what I can tell paralleled 3/0's wouldn't work in this case due to ...Therefore, you will need to use 400 AWG ground wire. 400 amp 3 phase service: For 400 amp 3 phase service, you will need a minimum of 600 kcmil-gauge wire. Before you upgrade to a 400 amp service, you will need permission from your electrical service provider. In some cases, you may also need to pay some upfront fee for the upgrade.The term 400 amp service means the capacity of your home electric service. The capacity is actually measured by the amp. This also means that the current flows through the wire. So, in simple terms, the whole 400 amperage current flows through the wire and its maintenance is the 400 amp service. Making an upgrade on your electrical panel ...Turning this main breaker to the off position shuts off power to the entire house and all the branch circuits. The amp rating on this main circuit breaker identifies your electrical service size. If you have a 400 amp service, you will have two 200 amp main panels and each will have a 200 amp main breaker.For example, the box is 500 amps and the biggest wire is 100 amps. Then having a 500 amp rated ground is pointless because the 100 amp wire will melt long before the ground will. The best ground is an 8-foot copper rod you drive into the ground with a sledge hammer. Then you clamp a braided copper grounding strap to it.3 posts · Joined 2022. #1 · Jul 1, 2022. Hello all, I am installing a 400 amp meter base combo.I have seen plenty of example of 400 amp meter bases with separate 200 amp disconnects. These separate disconnects typically have a grounding bare and a hole punch to bring the grounding wire out through eco suit down to the grounding rods.2. Scalability: Ground mount systems are easily expandable, allowing for the addition of more panels as energy needs grow over time. This scalability makes ground mount installations ideal for off-grid properties with evolving energy requirements or space constraints on rooftops. 3. Ease of Maintenance: Ground mount solar arrays are typically ...Using a 14-gauge ground wire on a 20-amp circuit is generally acceptable as long as it meets the NEC or local code requirements. What size ground is good for 100 amps? For a 100-amp circuit, you typically need a #4 copper or #2 aluminum ground wire. However, consult the NEC or local codes for precise requirements.A: The steps involved in grounding a 200 amp service panel are as follows: 1. Locate the ground lug on the service panel. The ground lug is typically a green or bare copper screw located on the side of the service panel. 2. Connect the ground wire to the ground lug.Common Wire Sizes. For 100 amp service wire sizes are 2/0 AWG, 1/0 AWG, and 4/0 AWG if the conductor used is alumni, and for cooper material wire sizes 3/0 AWG, 2/0 AWG, and 4/0 AWG also the same. The ampacity value must be between these values to maintain the proper working of a 100 amp load.The term 400 amp service means the capacity of your home electric service. The capacity is actually measured by the amp. This also means that the current flows through the wire. So, in simple terms, the whole 400 amperage current flows through the wire and its maintenance is the 400 amp service. Making an upgrade on your electrical panel ...The wire size chart below shows allowable ampacities of insula, Ground Bar Kit For 400A & 600A BR Loadcntrs Eaton Loadcenter Gro, AT&T unveiled its streaming TV service, DirecTVNow, which will offer more than 100 chann, The minimum ground wire size for 100 amp service is 8, Sep 30, 2004. #7. Re: 400 amp service Since each of these panels , E-mail: [email protected] Phone numbers: Appalachian Power Customer Service Phone: 800-982-4237 AEP Oh, When you use Blade promo code BRIANF& F you and TPG will each earn $50 in Bla, Trench and install FPL provided PVC as follows: a. Trench along FPL , October 9, 2023 by GEGCalculators. The size of the ground wir, Ground an outlet: $25 to $100: ... Now, 200-amp service is common for, 400amp. I think everyone does it different. We used, If I have a 400 amp service and my only grounding el, Feb 4, 2024 · For a 400 amp service with aluminum, aim for a 1,, Above the 800 amp breaker, the ratings hold at the, National Electric Code 310-315 specifies electrical , Re: Parallel 3/0 or 4/0 for 400-amp. The required ampacity, Lets say you have a commercial steel frame building , I am bidding my first commercial job and i know that.