Electrical Wiring- 3 phase panel detail
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- Опубліковано 1 жов 2024
- www.electricali... In this video I am describing how a 3 phase panel is built and how the bussing works in accordance w/3 phase power. It is part of electrical wiring systems common in the U.S.. This electrical panel is a 3 phase 4 wire 120/208 v 200 amp panel with 42 spaces. It is considered a bolt on breaker style with a main circuit breaker.
Considering this was uploaded many many many years ago means video quality is always going to be an issue. Regardless, love this video. As a licensed electrical engineer, most of my work evolves around drawings and getting to see how the actually detailed mechanism and wiring works great. This also allows me to understand how the breaker is actually mounted. Thank you!
Thank you! Over the years I have had many EE's ask me to see pic's of the real thing for the same reason. Let me know if there is something in particular you would like to see and perhaps I could do a video about it!
I'm a journey man in Texas and I will be the first to tell u that that's a beautiful looking panel and people don't understand that's it's not easy to make them look that good it takes finesse lol but u did a great job
It takes BIG balls to do that.
Is that strande wire or solid????
@@georgeswindolljr1980 hype!!
Great explanation on how a 3 phase panel works.. one of the only video's i have found that is simple, short and that you feel like you have come away educated.
Awesome! Thanks so much for your comment!
That really is a good question! For years I thought that I didn't need to know about Ohm's Law.But as I moved into a different direction in my career I realized how important it is to understand it. I started doing a lot of remodels and service calls about 15 years ago and found out quick that I need to know more.
I think if a person really wants to succeed in the Electrical Ind. they must understand all aspects of this industry.My advise--Learn as much as you can about all aspects of electrical
Thank u for the video. It is the most succinct explanation of a 3PH panel I have seen. Being a female apprentice I am hesitant to ask for more explanation if I dont initially understand something bc the belittling I get from the instructors is just not worth it. I have learned more from UA-cam than I have in 3 years of classroom theory. I really appreciate ur knowledge & the fact that u share it so freely. Be safe & thanks again!
You are so welcome. It really helps me to know that people can learn from videos like these. All too often I forget to mention something or misspeak in a video and I become a hack or whatever else the youtube trolls feeling like calling me that day. NOBODY needs or should be belittled.
Let me know if there is anything else I can help you with!!
Thank u - appreciate the response. What I can say is that what helped the most is that u broke down the panel into its most basic components thereby making the info that follows much easier to absorb. All to often senior mechanics tell u WHAT to do, but rarely tell u WHY ur doing it (I realize that time constraints do not permit explanation of every little thing but really, panel installation instruction HAS to be concise . . . its basically the heart of ur electrical system) Even when a mechanic is actively trying to impart knowledge they inevitably omit something because it is so rote, or ingrained in them and their personal experience is so far beyond that initial step, they automatically gloss over it. I love the detail in ur videos. And when u think about it, WHO are u trying to reach . . . the people who want/need to learn the trade or the trolls who think they already know everything? As for "anything else" . . . If u have a video on Fluke testers please let me know. As much as I hate to admit it this far in, I have basically no experience with it (we are treated as assembly-line monkeys) so we just do commercial installations before anything is energized.
Thanks, I know over the years I've heard "your not ready for it" or "I don't have time to explain, we need to get this done" Another thing is they don't know how to explain it they just know how to do it.
I haven't made any videos specific to a Fluke,you didn't say what type but maybe it's time I make one.
I have a couple different Flukes designed for different purposes.
Thanks again for commenting and watching my videos.
2018!! I like his videos 🙄 Good job man.. SPREAD LOVE ❤💚💛
as a female apprentice, it is your job to learn as it theirs to teach you. electricians and shops will come and go, but the knowledge needs to stick. the best revenge is success.
Absolutely the Best 3 phase video, great !
We are a third of our lives at work! How little we store memories from this period? In fact, I have tried to record some of the events on film and video! Use every opportunity and record the people on the job, working methods, in order to leave some memories to future generations. The time it takes an amazingly fast!
great explanation! I've been so confused in the 3 phase panels in school. I mainly do residential electric work so i never get to see these panels. This cleared it right up for me!
Thank you,I'm glad it helped!
Nothing new to myself but good and clear explantion of a 3PH panel.
Thanks!
Halo bro
Amazing how you explain everything. Thank u sr.!!!
There are many varieties of breakers and panels. 3 phase panels are built both plug on and bolt on styles. There are 3 phase load centers(plug on) and 3 pahsepanelboards(bolt On).You need to use the specified style breaker to match the type of panel your using.
It's quite different than European electrical installation. We have everywhere three phase (black, brown and gray), neutral (fair blue) and groun (green or green-yelow). There are one some phase (in left hole), neutral (in right hole) and ground in 1phase (230V) power outlet. There are three phases, neutral and ground in 3phase (230/400V) power outlet. Every diferent circuits are bad. It is interesting your wiring in America. Sorry for my English :)
Yes, there are some diferent wiring in states in Europe. But I have thought distrubution cable to house. There are three phases, neutral and GND wire almost everywhere (more than 95%) in Czech republic. For examle this picture - mylms.cz/pic/wiring.png Other states can be different (ussualy colors of wires and older wiring).
I have a commercial building and it has 3 phase. We had one of the phases go out. I had to learn that its possible for that to happen. 1/3 of our power was on in the building. A real learning experience. Thanks for the video!
Thank you!
Great video, very thankfull for people like you that takes time to teach alot of people like me in 6 minutes, is awesome thanks alot sir !!!
Thank you! Sign guy here buried in learning the NEC code book, and this video helped me with visualizing this!
New mechanical engineer at Schneider Electric here. You helped out a lot sir. Thanks.
Good luck in your career and thank you for the kind comment!!
Congrats on the job, designed in America! Tell your boss they need to up their game on the QO/HLINE breaker terminals. Those basically flat plates that can take two wires are a real weak spot, and pain to tighten down square. Whoever wired that panel in this video knows what I'm talking about.
www.google.com/search?client=ms-android-verizon&tbm=isch&q=square+d+qo+breaker+wire+terminal&spell=1&sa=X&ved=0ahUKEwi_lOz6ydjZAhUo5IMKHZ_IBtEQBQhLKAA&biw=360&bih=612&dpr=2#imgrc=JOBubWs_jkqu-M:
Is it most common for a (e.g 480Y/277) panel to start from left to right with the phase order of A-B-C.
Helpful info, thanks for sharing!
Nice presentation explaining the panel! Appreciate your time and trouble, and answered most of my questions too.
Thank you for sharing your knowledge.
Glad it was helpful!
slot of people don't take the time to make sure each branch circuit is bent at a perfect 90 degrees lol
Thanks for you comment I appreciate it! Pipe bending vidoe is on the list of videos to produce.
Outstanding video! Very well done. Thanks.
Also, I'm asking mostly from a theoretical standpoint, not necessarily whether unbalancing the phases will cause specific problems like burning your house down (I know it won't). And I know that the overwhelming number of boxes I've worked on had circuits both originally placed, and later added, without any sort of real forethought, so I know it is common to just pop breakers in wherever. Does it make a difference?
I don't understand why you think I'm in for a ego booster. "Any dam good electrician" had to start some where. I put these videos up to help those who want to help themselves learn more about the trade. No other reason. You have a right to your opinion-that's cool, But be constructive with you comments-help someone else for a change,never know,they could be working next to you someday.Realistically that can only help you!
Could you do a video on how 3 phase, branch cct work?
@37474748 I have some videos I have done with a video camera but audio(background)noises effect them quite a bit. Also lighting is a big issue. I have a video of the panel full of breakers and the contactor control panel next to it,I guess I could throw that up and get your opinion!
I really find your videos useful. I like Fritz have a degree that has gone unused because I went in a different direction but find myself returning to old skill sets to make a living. You videos are a wonderful refresher to those of us that are a little behind in the actual application of the trade and as you said to some goof down ing the postings, we all have to start somewhere. Thanks and keep up the great work.
Thank you!
I would first test power at your service. Check fuses,turn off all breakers at your panel then test again. Sounds like it could be the main fuses or incoming power. R U using a quality tester? Let me know more.
It would have been really cool if you had also detailed the wiring on this breaker by doing mock install of the wires into the terminals as you explained the panel. All n' all, great video.
I do run into the high leg quite often. I have seen huge errors when people don't pay attention to the high leg. A few years ago I was in a hurry on a service call and didn't check voltage,took out a computer power supply!! The panel had no markings on the feeders and was jammed w/ 2 & 3 pole breakers so it was not an obvious thing!!
I am not a mind reader. :-) There are plenty of people that don't know about this,those are the target audience. What do you want to be taught?
Great Video! Thanks For putting it together!!
Ok I'm not going to disregard American electrical standards but please tell me that their is secondary protection from the exposed 'Live parts' in your Distribution boards? Does the first board have a main isolator? To isolate the entire board? Maybe I'm mollycoddled to what I'm used too.
If I have 3 existing 220 single phase 4 wire outlets each with it's own breaker, is it safe to assume that all of those wires from each outlet come back to the main panel? In other words, would any of those wires coming off the outlet be tied to anything somewhere in the wall, other than at the breaker box, assuming it is to code? I am wondering if I can add a 3 phase subpanel, that would work off a digital phase converter that could use the existing single phase wiring to create a three phase outlet or connection? I obviously would have to find the appropriate neutral and ground wire for each outlet. Can you comment?
I am a new subscriber. If the 3 phase circuit breaker has a 380-400 volts. How about the 1 hot and 1 neutral?
more more more, and the info on MLO compared to MCB please!
Thank you . Some phases A B or C can be a high leg 220 . so i learn that the hard way in my younger years has a electrician. Test ur phases and breakers and circuits at all times before you plug or connect something. Doenst have to be just commercial. On high legs
I will answer your question . No the phase angle has nothing to do with it.You can put a two pole breaker in a 120 /208 3 phase panel as long as the appliance is rated at plus or minus 10 percent of the appliance voltage rating. This panel can used a common trip 3 pole breaker down to a single pole breaker. In the video it looks to me all one pole breakers are being used. The most important thing here is to balance the load.
If you are going to do any kind of teaching on here at least have all the facts present, before trying to fill people in on the way to correctly do any electrical work.. I do appreciate the knowledge you are willing to give out. I have been licensed sine 1991 and take pride in my work..Please before someone gets hurt know all the facts... black, red blue,= white neutral brown, orange, yellow = grey neutral... That are the facts... There for no one will be injured by inproper wire marking...
I do understand the functions (sort of) between hot neutral and ground of home wiring. I know you cannot get them switched or else faults or a fire could occur. as i was younger i did mess with electrical wiring. ( blew the breaker a few times ), but still have a respect nowadays as an adult. IF YOU do not know what you are doing, DONT ATTEMPT IT. Electricity is non forgiving and your life could be ended. I blow stuff up with 110v sometimes, but always remember to make sure power is cut JIC
my father had installed a GFCI outlet in the kitchen. He wired it up, turned the power on, and plugged in the coffee maker, the bottom outlet worked fine, the top when plugged in tripped the GFCI breaker. So he broke out the manual, and found the wiring was backwards. turned power off, removed outlet, and wired it the right way. Works great now. Still goes to show. Even AC power doesnt have poles, (like DC) correct wiring is a MUST to prevent faults. I believe hot and ground was switched?
Sparky, Hi, so I'm hooking up a baler that's 480 3 Phase, now i have 2 panels, one is a MLO to a MCB and it looks like they took 4 wires from a breaker inside the MLO that goes down to a transformer and from the transformer it goes into the MLO that has all the breakers for everything.
Now can i hook a 3 pole breaker for my baler off the panel or should go to the MLO (The MLO doesn't look like i should hook anything to it directly.
What kinda machine is it? what is the amperage?Do you have a disconnect for it?Where is it located,inside or out?
You should'nt be able to insert the plug for one and why would you even try?Never try to "make" something work that it was not designed to do.
What are the breaker configurations 1p vs 2p?Have you taken amp draws on all breakers or just the main? Balancing is done by relocating breakers to another phase depending on 1p vs 2p breakers. Balancing a single phase panel vs 3phase panel are 2 different animals.
How did this panel get to having a load difference?
200+ on line 1? What size is that panel?
THere is a little more to it but these are the basics.
I enjoy the instructional videos like this. Though the idiot wiring videos are interesting too.
Can a 3 phase breaker be installed on circuit 5,7,9. That would be c,b,a.. or does it have to be a,b,c
I want to run 7 circuits 120v which color what circuit number can and can not run...???
Absolutely.You would need 1-single or double pole breaker installed.
Wiring to your device would be hot,neutral and ground for a single pole and depending on your requirements you could run two hots to a motor,light or whatever. Always check your spec's before running any power.
I am in a princess. And this video is very helpful, thank you. I'm sorry my spelling is not the best
can u please help. me out with this project? I am installing a electric cook top stove that has 3 wires. r ed ,black, bare. 8 gauge. from the power supply I have the 8 gauge with a black,white,bare. how do I match them the right way?? I know the black go together but I'm not sure about the red and white and bare wires. both wires have a bare but one has a red and the other has a white
Does the neutral wire have to be insulated in a 4 wire delta configuration? 120/240 3 phase service
Sparky, if I have a 3 phase service panel and want to put in a 2 pole breaker won't the phasing be wrong for 220 appliance to work? Three phase is 120 degrees, single phase is 180 degrees out of phase.
I've got a question ? When testing a 3 phase panel I got a reading of 24v 120v 24v can you explain the circumstances this would happen? This is what I get from the Electrical room to my service panel?
just want to ask how do you do load balancing... Our supervisor sad that during Maintenance, Line 1 was reading to about 200+ amps while Line 2 was around 120+ amps... how do you do the balancing?? thanks
With 220/ 277 etc. you are pulling less amperage as opposed to a 120 volt circut. For example a circut on 120 volt may require 7.0 amps but on 220 volt circut the same device only requires 3.5 amps.
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Thank you for keeping it simple understand perfectly
Can this 3 phase be converted to 2 phase for residential use?
i took my comment off. what is your reasoning on here to put this on? i think it pumps up your ego to let people know how great you are. no dam good electrician needs your video.
You must have had it easy getting your degree cause most who worked their ass off would never say such a thing. If you see something incorrect or dangerous, you should say something.
Thanks for the explanation,. how 3 phase wires color code are connected to any 3 phase input equipment, if 1 or 2 color are different ? ... thank you . Tito
Your camera and lighting is awful we cannot see everything clearly. You might want to re-do this video
What's the purpose for the additional isolated ground bar in the upper left of the panel?
During a power failure, is it possible for just one phase to go out while the remaining two are on, or would all three phases go out during a power failure?
Thanks,I really appreciate the feed back!
Great avatar!
Can you show the actual putting a breaker in... a video, as opposed to still shots. I want to see the breaker installed or is there a seperate breaker for for each of the 3 phases? I don't understand?
Really anyone that does any 3 phase 240-volt system black, red, blue knows that there neutral is white... come one teach me something please......
Excellent introduction for those of us who have worked only with single phase. Thank you.
Thank you and happy to hear it helps!
A person with such accomplishments should do something better with his time!
What is the standard when it comes to the distance between each leg of AC on the feeder? They look evenly spaced there at the top. Can you refer me to the standard or provide it? Thank you.
Thank you for the clear explanation.
this is probably a dumb question from phase to phase its 208v but from phase to neutral its 120v why would it not be 104v half of 208v
Great video great explanation
Hello sparky, if hooking up hi-bay lighting that requires 208V from a 120V/208V 3 phase panel do I take both circuits off one phase?
@sbales63 Install a second ground wire back the the service,mount on a isolated buss in the panel. Just be sure not to mixed dirty ground with the clean ground anywhere in you circuitry. AKA "IG"
Where would the motor starters be located? Is it in a panel next to the electrical distribution panel, or by the motor itself.
I am still wondering why you don't ground a sub panel. It is sorta needed, as an extra safety measure...,
multiply 208 times .58 and thats your answer, and that goes for anu 3 phase voltage system. Current would be 1.73 times
Hey how do I transfer measurements from floor to a sloped ceiling if I don't have a laser? For like island lites need sometimes
Do you know how many current carring conductor can i put ina 3/4 pipe, and also can i share my grounding conductor,
@davec3487 Most of the installations I run across the motor starters are located near the motor.
All of the car wash's I work on have a MCC,Motor Control Center, located some where in the equipment rooms.
So really it depends on the application.
@discountcontractor I would take it back and get the correct panel.
3 phase 120/208 or 127/220 V is the best for houses. European 230/400 V it's dangerous! it's ideal for industry.
Black red blue, and not 1 phase or a al the way down,really ? Only now I know that, Thank you sir
Thanks you for a good
Sparky,
what do you think about the SIMpull from Southwire.. a good system.. considering cost?
Can you elaborate on the voltage of the MIDDLE phase. Most of the circuits shown seem to be ALL three phase indicated by the three color wires.... A couple of circuits at the bottom seem to be 120V (one black wire)... Did they purposely avoid the Middle Phase i.e. 208 Volts?
Another question.. On the the right bank of circuits there are two sets of black red blue... Two OPEN circuits then a blue? Any Idea what was the intent?
If I understand it right have between one phase and neutral 120 Volt, between phase A and B or A and C or B and C 208 Volt.
it's red black blue sparky!!!!!!!!!!! (at least in canada, i know you're in the states lol)
with 208 can I run 3circuts sharing the neutral and 480 can I do the same for 277 lightning
Excellent!
Thank you!
Thank you for this video. Very helpful
What’s the point in an isolated ground if both ground bars are mounted on the same part of the panel?
Awesome video. We're farmers that now have need for 3 Phase panel fed by a Phase Perfect Converter. Your detail was perfect - thank you. If you have video on phase converters I'd live the link.
very good explanation....
well funny.. u shouln't had need to ask anyone if you were just a lil smart ;)
Nice clean panel.. but!.. up here in canada in our Electrical code book we phase (A=red ) (B=black ) (C=blue) as would be the breakers in the same order 1 red 3 black 5 blue and etc..color codes are important...arent you suposed to do the same and say that in this video especialy in accordance to 3 phase power?.... so not black red blue... RED BLACK BLUE..
Sometimes I see BOY (B=brown) (O=orange) (Y=yellow). When is it proper to use BOY v. RBB? What is the electrical code for machine panels on what color wire you use to wire the power circuit?