What steps are involved in adding another main panel to a home with two maxed out 200amp panels, and what factors determine the cost and feasibility of this project?
I’ve got two 200amp panels in my house that are completely full. What would it entail to add another panel? I usually handle all my electrical work and have installed numerous subpanels, but anything involving the main panel or the main feed is where I draw the line. So, I’ll definitely be hiring a licensed electrician for this, but I’m just trying to get an idea of what needs to be done and how much it might cost. I’m also unsure if my meter can handle another panel, here’s a picture of it.
Just to clarify, I might not be maxed out on the service, but I’m at capacity in terms of space in the room for both panels. They’re pretty big panels. I’m not a fan of tandems and would prefer to have a separate panel. And for those wondering, I do have a large house but no, I don’t have a secret grow room, though that would be pretty cool!
I’ve posted pictures of the panels for reference.
Also, keep in mind that I have 100amps going to the subpanel outside for the pool and pool house, along with 3 heat pumps (2 with electric backup), a steam room, and a sauna, each
What makes you think you need more than 200 amps right now?
Rzesiek Jaros I assumed that since both panels are maxed out.
What makes you think they’re already using the maximum capacity? You should determine the Amp draw of each panel first
Terry is convinced they are completely full since there are no spaces remaining.😂😂
Absolutely, ! You hit the nail on the head.
I hear you, . It’s frustrating when someone installs 20 circuit panels.
Totally agree, . A lot of people do that and then want to argue about it.
Hey , so if that’s the situation you have 2-200amp panels with a maxed out breaker count, most likely not pulling over 100-125 amps max. You can’t just count the breakers or add up the numbers. Use a clamp on meter to get an accurate reading with everything in the house running that you can turn on the power to. I have a pretty big house and a 30X30 barn on a 400 amp service and I still have plenty of room to add more devices.
Hey , I made some changes to the post. My space is maxed out, but maybe not my service.
Hey , those are 30 space panels. Just wondering, not trying to argue with anyone.
Mentioned in his post that he has a lot of motor/pump and heaters. When looking at the panel, I noticed an additional 4 AC loads on top.
Depending on your location, you may need to go with a “CT meter.
First thing, get a professional load calculation done for your entire house. That should give you the answers you need.
Hey , this is just a reminder to submit your report by the end of the day. Thanks!
Just curious, how large is your house? 400A is already quite a substantial amount of power
That’s exactly what I’m curious about! I have a 3,600 square foot house, a well, a small apartment, and a shop all powered by a single 200 amp panel.
Sounds like it’s a 200 amp service with a 200 amp main panel feedthrough to another 200 amp panel.
I have a similar setup, completely off-grid, and I can assure you I never exceed 100 amps. That’s only when the AC kicks in for a split second.
Wow, that’s huge. 10,000 square feet!
I really hope that’s not the case.
Hey , why do you think there’s nothing wrong with that? It’s all protected on a 200.
Take a look at the meter. If it says CL200, that’s what it’s rated for. That service seems to be massively overloaded.
Ot it, en. Now I understand.
Hey , I would definitely consider doing what the first guy suggested. Maybe get a load calculation. It seems like most of the incoming power is 14 gauge, so your actual load could be way less than expected.
Hey, , it’s definitely not 400Amp.
You know, you really can’t have a 400 Amp service in a residential house.
He has a 200Amp meter with two 200 Amp panels.
Hey Christopher, I think you might have misread the meter – it’s actually 200 amps, not 400. Just wanted to clarify that for you!
My house has a 400 amp meter panel with two 200 amp sub panels.
It really depends on your location. There are houses in Florida with 600 amps.
My wife always says, “It’s not the size that matters, it’s how you use it.”
You can totally have a 400 amp service for your home. One of my friend’s dad actually lives in a gated community and his house is 7500 sq ft with a 400 amp meter. He has two 42 circuit panels, both 200 amps each, and additional panels that supply power to the pool pump storage house. Plus, he has 4 AC Units.
Do you currently have a 400 amp service or panels totaling 400 amps?
I was just thinking that maybe it’s a feed-through panel with a 200amp 60-space capacity.
What are you growing?
Hey, I was thinking about 🤔
I bet has a pretty hefty water bill.
Rowers these days are using LED lights because they produce low current and much less heat.
Will take an ounce.
Sadly, is not up for any fun today!
How on earth are you pulling 400 amps?
I totally agree with you.
I recommend testing each feed in your house first. There’s a good chance you have several spots taken up unnecessarily. Have an electrician come and conduct a current test on each breaker. I would venture to guess that many of those can be doubled up.
Sure thing, . I’ll take care of it.
Have you ever tried running backwards through a cornfield while naked?
Arrett Black only once
Is all you need, haha.
Arrett Black finally learned his lesson, hahaha.
Just because you have a 2-panel 200amp setup doesn’t necessarily mean you have two separate 200amp feeds. Panel 2 might be a subpanel from Panel 1. Make sure to do a load calculation first before seeking advice. Remember, one meter can provide a lot of information.
Unless you have a ton of grow lights and heavy machinery, it’s unlikely that you’ve reached the maximum… 400 amps should be sufficient.
Are you serious?
Well, you currently have a 200A service through the meter, so you’re most likely not using the full 200A right now. Time to refer to the NEC tables, calculate your actual loads, and consider doubling up some breakers or adding a sub panel as needed.
Do you have any idea how the code book will assist in calculating his load? It will only provide a calculated load which may be suitable for an average in a subdivision
Take a look at this link: https://www.ladbs.org/docs/default-source/forms/inspection-forms/sfd-electrical-vehicle-charger-service-load-calculation-form-in-form-00.pdf?sfvrsn=1ca8e453_20
Is it true that the NEC does not determine how a residential load calculation is completed? The Canadian code book does…
There’s some nonsense happening
So you’re saying you have no room to install a new breaker?
Absolutely, .
You know, Alex, you really just need a bigger panel.
Just needs tandem breakers and then the problem is solved.
Sure, can come if he has space, haha.
I totally agree with Eric, using square d tandems can definitely help create more space.
Sure thing! I can definitely do an assessment for you. It’s $129.99 plus travel expenses.
How in the world are you maxed out at 400amps?
I don’t think Dewsbury actually has a 400 amp service, even though he believes he has 2-200 amp panels. My guess is that it’s actually a 200 amp service.
I have two 200 amp panels, so I just assumed it’s a 400 amp service.
Hey , do you work as an electrician?
Dude, that’s not how works
If that’s what you think, just add another 200 amps and you’ll have 600 amps!
Dewsbury, really? No way, haha. If I was, I wouldn’t be asking.
Your meter is rated CL 200, which suggests that your house was set up for a 320 service, but the power company never provided you with a meter that can handle 320 amps. Your current meter can only support up to 200 amps.
From the meter’s perspective, having a CL 200 rating means that someone set up your house as if it has a 320 service, but you actually have a meter that’s only suitable for 200 amps.
It’s highly unlikely for a residential space to draw more than 200 amps. If that happens, the meter might not be able to handle it and could overheat and get damaged.
This post seems like nonsense. Even if you’re growing weed in your basement, that’s still a lot of power. ‘t overcomplicate it. Anything over 400A and you’re going to need a CT cabinet. You’ll have to check if your utility can supply your property with anything higher, and it’s up to them to decide what the setup will be. Before anything else, you need to find out what your local city regulations are. If you don’t have the need for this much power, they won’t even entertain the idea of getting anything higher.
I really wish that at least one of these electrician groups would actually have real electricians in it. This guy asked a good question, made it clear that he is at the limit of his knowledge, and just wants to understand what needs to happen. He even said he will hire a licensed contractor to do it. But there are still a few jerks laughing at him. Are people really that unhappy with their lives that they have to mock someone asking a smart question in a group meant for professionals? Are there any grown-ups in these groups? I still love my job and would like to chat with other professionals. Is that really too much to ask these days? Anyone who is an electrician should be able to see themselves as mature adults. The way some people are treated doesn’t show that.
Just chill out and let people enjoy themselves. How is OP managing to use so much power?
Sure thing! , okay, so one guy was nice enough to explain the need for a load calculation, while another guy suggested checking what the main is drawing. Not too hard, right? What’s amusing about this guy’s question? Did the guys making fun of him learn to do service upgrades right after they were potty trained? Why is it acceptable to treat someone poorly for asking a question? The original poster could be the best auto mechanic in his state, and the clowns laughing at him probably have no clue what injector pulse is. I’m tired of seeing a bunch of children getting involved in very adult conversations.
The younger generation, according to , is absolutely hopeless!
I completely agree with you. People are always criticizing others. I’m really happy that I got into trading many years ago.
You said that perfectly!
I totally agree with you, instead of offering professional advice, some people resort to making silly jokes and putting others down to make them feel bad for asking a simple question online.
Well said David, I totally agree
Grab your purse and go wait in the truck
Thanks a lot!
To be honest, he didn’t provide much detail. That’s often the reason behind vague answers
I once asked a genuine question when I was starting out as an electrician on this page, and I was called names and made to feel dumb just because I didn’t know something (even though it wasn’t a silly question). Shouldn’t this group be about supporting each other? It’s not a place for mocking others… I don’t think I’ll ask anything here again. Why are people so unhappy? 🤷♀️ I’ll probably be teased for this comment too 🤦♀️🤣 let’s see
Yeah it’s tough… I have thick skin, so it’s all good. I’m part of other groups where I’m considered an expert and I enjoy giving genuine advice. I just ignore the negative comments.
It’s frustrating when people act this way. I joined this group just to offer help and share some advice
No joke I’ve been in this since ’72 when we didn’t have cordless power drills. My go-to back then was a craftsman drill with a gas engine. It’s disappointing to see where this industry is heading
I completely agree… an easy solution would be adding twin breakers to expand the circuits…. No need for another panel
I’d rather go sit with my wife… who is definitely not overweight.. just making a point…. your words speak volumes about your character.
Us newbies really appreciate the support, instead of dealing with self-centered individuals calling us names! We’re still learning here, not fully qualified electricians yet, and if we need guidance, it’ll be from electricians 🤷♀️… we really value people like you, believe me, thank you
Hey, there are always negative people in every industry… best to just brush off their comments.
Most of these communities are like that.. I know I should just brush it off but it’s hard, and this guy had almost perfect manners when posing his question… the truth is social media highlights that a vast number of individuals in this country are lacking in various ways, I know I’m lowering myself to their level, but this guy didn’t deserve that… it’s quite reassuring to see a good number of people supporting my view. Sadly, it’s still exasperating… just keep going. 😉
I have a thick skin too, but I’m genuinely just trying to solve a problem and it’s a valid question and all I receive is negativity…this generation of people really saddens me…we truly value individuals who are willing to help, it just seems like social media isn’t the place…maybe I’m too old, I don’t know 🤷♀️ everyone’s an asshole lol
Thanks a lot, it’s heartwarming to know there are kind-hearted people who want to assist others, I really appreciate it (at least from my end)
Yeah I’ve also dabbled in the painting business…ughhhh dicks lol
Welcome to the online world! Hope you have a great time here.
Single pole tandem breakers. Quad breakers for the 240v ones
It’s best to hire a professional
It sounds like you will need to upgrade to a 400 amp service.
If you’re drawing 200 amps, your electric bill is probably higher than your mortgage. Perhaps you just need more breaker space. Your panels should have 40 spaces each. Install an ammeter on each phase in the main panel and let us know the readings.
Looks like someone’s basement could be a grow house 👀. Both 42 spaced panels are full?!?!
Yeah, they definitely are.
Oh wow. Sounds like there’s a lot happening in that house, haha
10k sq ft house probably needed a 600A service in my opinion. The larger the house, the larger the service.
It seems from reading the comments that I might not be at my service limit, so it could just be a space problem.
Is definitely a pro! It’s just amazing how you managed to fill up both panels, especially with 42 spaced panels.
Just turned 30 and updated their profile picture. They have a lot of stuff, haha.
Simply upgrade one of those to a 42 space and you’re all set.
Adding another panel can create more complications because you will also need to make space for the breaker that powers the new panel. This can make using tandems more difficult.
Typically, people run out of breaker space way before they run out of electrical capacity
That’s probably my current situation.
If you’re only adding light and receptacle loads, you should be okay adding a small sub-panel from one of the existing panels.
In reality, you may have two 200 amp panels, but your service size is only 200 amps. How many circuits do you currently have in total?
Take additional pictures to provide a more accurate answer.
👆🏻agreed
Hey, if you’re not an electrician, it’s probably best not to do anything. But if you are, go ahead and amp clamp those bitches.
Just try switching the panels to a 40 space, I don’t think you’re using all the current available.
A 300 AMP SERVICE SHOULD SUFFICE
He can’t be pulling 400 amps on a 200-amp meter, he might just need a panel upgrade or add another subpanel
Dude must have a 10,000 square foot grow room
I really wish I were .
Include some narrow double breakers.
You have a 320A service with two 200A panels. That’s the maximum residential service size available. Instead of adding another 200A panel, think about upgrading one or both panels to larger ones with more spaces (around 40/80 should suffice). This upgrade would be like-for-like, so no need for new feeders.
I’ve been waiting for someone to mention this!
That makes perfect sense. Thank you.
Absolutely
Do you mean that there are no more spaces for breakers in the panel when you say it’s maxed out? Because that doesn’t necessarily mean it’s maxed out… unless you’re growing a lot of weed!
Eorge Nik is right, you definitely need panels with more available spaces.
Eorge Nik, haha yeah. I meant running out of space.
You seem to be constantly tripping circuits every time you try to do something new. You’re definitely hitting more home runs than the average homeowner. If you upgrade to a pro amp as the main feeder, what will that result in? Adding another panel might be an option, but have you considered your current power draw?
If you need to upgrade your service, they may recommend installing a new main panel and converting the existing panels to subpanels. This could involve replacing all lines and equipment.
Are you saying all the circuit breakers are in use, or are you indicating that you’re drawing a peak of 400 amps? This would be equivalent to 96,000 Watts or 96 kWs per hour, costing approximately $12 an hour in electricity. Your power bill would be significantly high.
Just go ahead and install a sub panel.
Consider using an ampmeter to balance the load in your panel. I don’t think you’re drawing that much amperage. How many space panels do you currently have?
You may want to consider doing a load calculation and potentially upgrading to a 400 amp service. Do you think you might not be using as much power as you think? Adding a sub panel could be an option. Are you interested in separate metering for this panel?
Possible meth lab
I’m definitely not a backwoods hick, so nope!
If you’re unsure about your own question, then I strongly suggest you cease DIY electrical work immediately
I am kinda looking for more clarity on maxed out? For example, having a 4000 Sq ft all-electric house? Or? Mine, you might say, is maxed out with a 100Amp box in the shop, 200 Amp in the house. Plus the outside panel that I have AC connected to, and the panel in the house, and shop. Amp-wise it is not maxed out. But I have a gas furnace. Stove, water heater, and dryer. And a gas heater in the shop. What I am asking is what makes you think you need something bigger?
When you mention they are maxed out, are you referring to the number of circuits or the actual load being drawn? How much power are you currently using from the meter?
Upgrading your entire system to 400 amps can be pretty pricey, depending on what you need it for.
Have a chat with your power provider, they should be able to give you the actual load data for your home. You will also need to get their specifications for upgrading to larger service entrance equipment. For instance, if you upgrade to a 600 amp service, the utility may require a transformer-rated (CT) service, or a bolt-in (K Base) meter socket.
I’d bet money you are pulling less than 200 amps (48 KW) at your home
You actually don’t need a larger service. A 200 Amp/240 Volt system delivers 48,000 Watts of power per hour, which is equal to 48 KWH. At 80% capacity, that’s 38 KWH. In a day, you’d use 9212 KWH, and in a month, it would total 27,648 KWH, resulting in a monthly bill of $3780.00, with 20% capacity remaining. If you map out your circuits and use an Amp Meter, you might find some circuits that can be combined, such as pairing two 20-amp circuits. Instead of connecting two wires to one breaker, connect the two hot wires with a third wire leading to the breaker. This can help you save money. Hope this advice is useful.
That service seems pretty big for a home, unless you’ve got heat pumps and an electric vehicle charger.
I can wire 921 KWHs/Day but I struggle with typing