Breaking News
Home » Batteries » Automatic UPS system wiring circuit diagram for Home or Office (New Design With One Live Wire)

Automatic UPS system wiring circuit diagram for Home or Office (New Design With One Live Wire)

Automatic UPS system wiring circuit diagram for Home or Office (New Design With One Live Wire) Method #2

Sh*t happens anytime… In case, If you want continuous power supply to the system i.e security or important online work etc or in an area where load shedding is must on daily basis, then you need an automatic UPS Wiring connection. If so, come to the point….

As a basic, we know that each load points should be connected through live (Phase) and neutral wire to operate normally. So in the case below, we have already connected Phase & Neutral (from Power house & Distribution board) to each electrical appliance i.e. Fans, Light points etc.

Now, according to the below UPS Connection Diagram, connect an extra wire (phase) to those appliances where we have already connected phase and neutral from (Power house & DB) (i.e., two wire as phase (Live) with same point as shown in the below fig). And no need to connect extra Neutral wire from UPS as it is already installed & connected before. Now the quieten arise here “Why Extra Phase wire ? … Yes.. Read the following operation story of the new circuit & wiring.

Working and Operation

(1). When Supply is available from power grid

Then Supply will continue through Phase wire (Note that Neutral is already connected) which is given to UPS from main board (it will charge your battery as well) and then from UPS to Electrical Appliances. So the Second one (phase or live wire) which is connected after UPS installation (i.e. One Live Wire from UPS) would be inactive because power supply is not available from UPS and batteries (Because it is Automatic UPS System).

(2) When Supply is not available from power grid
then Supply will continue through Phase wire (Output UPS) which is Connected from batteries and UPS to Appliances (Note that Neutral is already connected). So the first one phase wire which has already connected before UPS installation (i.e. Live Wire from Main board to UPS) would be inactive because power supply is not available from power house. In this case, you consume the stored Electrical energy in the batteries without interruption.

Note: If you don’t understand this wiring diagram or face any problem, don’t hesitate to leave a comment or  just read the next article about UPS Wiring Installation wiring diagram No# 1 with purpose, Description, and working principle.

Below is the Automatic UPS wiring diagram No# 2.

Click image to enlargeAutomatic UPS system wiring circuit diagram for Home or Office(New Design With One Live Wire)

You may also read here more UPS / Inverter Wiring Diagrams & Connections

ETJLCPCB - Prototype 10 PCBs for $2 + 2 days Lead Time
China's Largest PCB Prototype Enterprise, 300,000+ Customers & 10,000+ Online Orders Per Day
Inside a huge PCB factory

About Electrical Technology

All about Electrical & Electronics Engineering & Technology. Follow , Facebook , Twitter , Instagram, Pinterest, YouTube, & Linkedin to get the latest updates or subscribe Here to get latest Engineering Articles in your mailbox.

Check Also

What is MCB (Miniature Circuit Breaker), its Construction, Working, Types & Applications

MCB (Miniature Circuit Breaker) – Construction, Working, Types & Uses

What is MCB (Miniature Circuit Breaker), its Construction, Working, Types & How to select proper …


  1. what is the size of wire shoule be used in connecting fuse box to ups

  2. Mohammed Munir Akhtar

    Dear Wasim Khan<br />I am thankful to you for the UPS diagram on your blog. I have found it perfect for installation of my new UPS with the system.

  3. Thx…. Much Appreciated<br />

  4. So as per your diagram we connect only the live wire from the ups output to the loads we want to connect. There is no need to connect the neutral from ups output to the load circuits. My ups was connected like this earlier. But now I have shifted and when i reconnected at new place as before and switch off the main switch to check the attached load doesnot work. I was wondering from where the

    • Suman@<br />There are more UPS wiring diagrams under the &quot; Electrical Wiring &quot; Tab. ( You should Check)<br />in this case of above diagram, we have connected only live or Phase wire from UPS to the load, because Neutral wire already connected to the load ( from Distribution board) so no need to connect Neutral wire.<br />If you want to connect neutral wire, then Use this method.<br />

    • I have a doubt on live wire from ups connected to loads.I have two flats on the same building. one flat has single phase supply and an inverter/ UPS connected. I had the second floor also connected with the same UPS with a live wire from UPS. This was done When i had no power supply to the fllat. Now I have separate 3 phase connection for the second floor. I have disconnected the UPS and the charger supply to the battery to avoid any untoward incident. pl suggest suitably

  5. How about pc

  6. What type of UPS it is in term of on-line or off-line UPS?

  7. Thanks for the Circuit. I Think, I can install my new UPS alone. But I have one doubt. If my House load is more than the capacity of the UPS means..? <br /><br />UPS will trip..? IF yes, After Electric board power comes, IT will not switch on right.? Then my house will not get power..?<br /><br />Please explain me.

  8. Dear Parthib@ <br />As we know that Inverter should be greater 25% than the total Load<br />Suppose your Load = 800 Watts, than, <br />800 x (25/100) = 200<br />800+200 = 1000 Watts<br />This is the Rating of the UPS (Inverter)<br />So, before installation , Try to calculate the rating of UPS according the load.<br />Secondly@ Can you operate a 500W Motor on 110 W???? So that is the answer.

  9. I have luminus sinwave invertor, i transfered to a new place , one elctrician came and connected it and it and not working , can u guide how i connect its out put and input in my mainswitch of my house.. shall bgr8ful<br />

  10. sir i wan to ask that as i successfully installed ups as in your diagram. but can now iwant to use generator can we use same appliance wired for UPs on GENERATOR means live wire plug into generator is it works<br />

  11. Hello sir, i have an pure sine wave 850va inverter and i m using your circuit in which one live wire is connected from inverter/ups output.. my half home appliances runs from directly grid power and half are through inverter and i use the common nutral wire.. now my question is if i switch off the input it will go in backup mode but will it affect my inverter because we use only phase/live from

  12. do you have single phase amf diagram , can you post it? someday i want to try install it at my house. thanks

  13. UPS’s are not expensive compared to the rest of a VoIP system, but unless they are budgeted for during the planning process they tend to be overlooked. When the UPS planning is done for the access closets, it is also important to make sure there is enough electrical power to the closets.<br />

  14. i have a problem with the output socket of my inverter, it gives output through left Pin in the socket when connected to mains and then supply changes to right pin when mains off or runs with battery

  15. sir, when i switch off main breaker , my home neutral line getting power. why? we have installed inverter circuit same as above. <br /><br />note:all equipments working as usual for years with same inverter diagram. today simply checked neutral line, and got this problem.

  16. Harish:-sir as per u r diagram the load is more as fans,lights ,chichen ites and ac&#39;s etc…are connected together on only one line…if the incoming power is switched off or shut down the load will drawn the all power charged in battery with in a seconds……so that we hav to drawn another one line for load…..

  17. Thanks for such information sharing with us ….<br />i am still confuse with this diagram…<br /><br /><a href="http://www.adeptpower.co.uk&quot; rel="nofollow"> ups system</a>

  18. Respected sir,<br />i have complete UPS system in my house, UPS also charges the battery now i want to connect solar panels to charge the battery. one i/p from battery and other i/p from solar panels, Confused what should i do?<br /><br />Zubair Anwar

  19. What I would really like to know is who will be the <br />notes written to <a href="http://bluepromoyo.blogspot.com/&quot; rel="nofollow">bluehost coupon code 2013</a> but <br />these forms of loans are normally only accessible to highly <br />experienced and successful developers taking care of projects over <br />$5,000,000.

  20. i wanna ask that if the plug attatched to ups is plugged out of ups and put in the socket in main circuit where the charging plug was attatched after removing it??

  21. Thank you very much for the simple connection diagram.<br /><br />But I have doubt. I think UPS is not connected to the Earth wire in this &#39;New Design With One Live Wire&#39;.<br /><br />Is there any way the UPS could be earthed? Does the absence of earthing affect the safety/life of the UPS? Is this important at all?<br /><br />Please reply as I am looking forward to instal a home UPS in the

    • As you can see that Neutral wire is already connected to all appliances…so no need to connect another Neutral wire… <br />another thing …. That Neutral wire is not for safety purpose..just for completion the circuit..<br />Also you can connect Earth (grounding) wire only with UPS for safety purpose…

      • Respected sir..
        If we disconnect the mains neutral for the circuit, then how can inverter completes its circuit? Actualy we did not taken the inverters neutral no…

  22. This comment has been removed by the author.

  23. This comment has been removed by the author.

  24. Connect WAPDA Phase and Neutral wire in UPS inlet (Input)

  25. Sir one more question, your diagram does not specify what to do with the main phase wire for e.g. if I connect a fan switch to the UPS, the UPS wire is connected to the switch, but what do I do with the existing WAPDA Phase wire that was connected to the fan switch before wiring the fan switch to the UPS? Do I jodo/twist the UPS and WAPDHA Phase together into that fan switch which I mentioned in

    • Dear Azaan Kaul@<br /><br />As you know, in your case, we had already connected Phase &amp; Neutral (from WAPDA) to Electrical Appliances i.e. Fans, Light points etc… So according the above UPS Connection Diagram…connect an extra wire (phase) to those appliances where we have already connected phase and neutral from (wapda) (two wire as phase with same point). So no need to connect Neutral

    • Thanks a lot Wasim Sir! Can you also provide a tutorial on how to install tube lights, exhaust fans etc.? Try to put some stuff related to Air conditioning too! Anyways really good website! Simplifies things!

    • Dear Azaan Kaul<br /><br />We Will try our best,,Stay tune here….<br />And bundle of thanks for appreciation…

  26. how can change automatically when power faliure

  27. Nice info thanks for sharing<br />

  28. sir, diagram is ok. we have 3 phase connection. living hall on phase 1 and bed room on phase 2 and kitchen on 3 phase. if i connect my invertor on one single line from invertor to tubes and fans it will work. when all 3 phase current (grid) fails no problem. my invertor was connected to phase 1` for charging. during night phase 2 (bedroom) power supply from grid fails, how my invertor will

  29. this is for ups but what about only 3 pin invetrer which contain 3 wire in a single cooted plastic cover which are responsible for input or output<br />

  30. Great web site you have got here.. It&#39;s difficult to find <br />excellent writing like yours nowadays. I seriously appreciate people <br />like you! Take care!!<br /><br />Feel free to surf to my weblog <a href="http://www.charlieshandles.com/&quot; rel="nofollow">poignées de portes</a>

  31. I hope you may continue to keep in posting new posts thank you for sharing your great experience among us. distribution boards

  32. can i use this diagram to power up an a/c small 200-400 watts refrigerator and a desktop computer?? your answer regarding this is much appreciated. thank you.

  33. can i use this circuit diagram to run a small a/c 200-400 watts refrigerator and a desktop computer? I have 850va pure sine wave inverter.

  34. Sir i want to connect 2kv stablizer and600VA inverter in my room.how it connect?

  35. In my inverter I am getting phase in output in one pin when current is available and it is getting changed to other pin when there is no power…i am confused now which one to use for single wire.. if i interchange the single wire pin my appliances are only working either in power on mode or in power off mode, please help me to correct this prob

    • I am facing the exact same problem since yesterday after the inverter was taken off and reconnected again. Can someone help? One of the earlier comments suggested to swap the input phase with neutral. I tried that but it didn’t help – the inverter doesn’t recognize the input if done that way. Am I doing something wrong?

  36. Dear author….u said while supply available from grid the pwr comes from main to ups to charge battery….then after ups to appliances.. what u said at starting is 2nd phase wire i.e from ups is inactive if it is inactive how pwr reaches from main to appliances…i asked because there os no direct phase connection from main to appliances

  37. can we take out put from phase terminal only for house wiring.

  38. hello sir,
    you have a marvellous site here. I’ve learnt quite a bit, almost enough to attempt a diy installation of an inverter! I have planned for a 1500va system with 2 batteries. here comes the daft question. I’d like to make it whole house. I’ve no major power hungry equipment. lots of 10 watt LEDs, two laptops, a small set top box with LED TV. I do however plan to get a. induction stove at some point,though there will not be a need to run it off an inverter. almost forgot my question. could I just connect the ups to the fuse panel directly and call it a day, or am I being silly?
    thanks in advance!

  39. Hi my question is when wiring the light switch/point with the UPS and mains wire, in which terminal of the switch do I have to put the UPS wire, is it in the input MAINS PHASE terminal of the switch from where you get the MAINS or the output phase terminal of the switch which is connected directly with the load. Could you please show a diagram if you can?

    In simple words in the pin of the switch in which you put the MAINS phase, do I have to put the UPS wire on that very same MAINS phase pin of the switch, or do I connect the UPS wire to the Output of the Switch, which is directly connected to the load such as fan, light etc.

    Please show a diagram if you can:


    Can you make something like this as a diagram in detail please?

  40. Apart from electrical give connection detail about Electronic system
    by my mail

  41. Sushilkumar Ashok Vaidhya

    Sir, if we gives input supply to the inverter which is charge the battry but same condition output wire also connected to same point that is live wire……..it meanxe both have current supply……. So in that position can inverter will work or not?

  42. Hi this site is very precious for me

  43. when power cuts how the power from inverter can’t go back to power grid i.e from service wire to electric poles and poles to transformer ….
    how inverter wiring prevents power to go back from house to electric poles and vice versa when no power supply from grid….
    other question brother how it take neutral when i unplug inverter from socket…
    how neutral will take as no need of neutral wiring when we connect only phase wiring to the output socket in inverter…..
    please explain me no need of neutral wiring and how power can’t pass from inverter to electric poles ,to the transformer……
    I am waiting for your reply…

  44. Do i have to know the Amp we used and compare it with the UPS we installed?

  45. How to connect same fan from main power and inverter power,send me the diagram

  46. Hi Sir,

    could you please confirm whether my inverter (Microtec 850VA EB Model) is compatible with the above diagram.

    Thanks and awaiting reply.

  47. Shibli Jameel Ahmad

    Thank you so much for the selfless service of providing such a perfect diagram, which can be understood and applied even by layman.

  48. viewdetails http://shirleywweo.wikispaces.com/six+Reclaimed+Wood+Projects+For+Do-it-yourselfers http://scottyeatu.soup.io/post/407977343/6-Reclaimed-Wood-Projects-For-Do-it http://www.dailystrength.org/people/3763055/journal/9442447 http://www.savingsdail

    A person necessarily assist to make seriously articles I’d
    state. That is the very first time I frequented your web page
    and thus far? I surprised with the analysis you made to create this particular publish amazing.
    Magnificent job!

  49. Very nice circuit diagram Wasim….it helped me in installation of inverter…please put provision of bypass also if we dont want to connect inverter circuit to heavy load appliances like AC, fridge…Just tell me for bypassing i m using direct live connection to appliances bypassing inverter but nonlive wire common…is it ok??

  50. Thnak you sir, i got my all ans from above comments

  51. output phase is getting change on my UPS. when main power will not cutoff then its gives phase from right side, after cutoff phase will change on left side pin. why this is happening??? please sir give me the reason and solution off it. thank you

  52. Hi,

    When power house goes off & my inverter is connected with common neutral (Single line wire) then how inverter supplies power to load as both phase & neutral from power house got disconnected & how circuit will complete in this case?

  53. AOA. I would like your help with a problem I have recently encountered with my UPS used at home. Yesterday, the UPS began to switch from AC Charging mode to Battery mode repeatedly and electricity started fluctuating with it. I thought there was something wrong with its input, so I changed the socket to which UPS is connected to, and installed a new one. As soon I connected my UPS to the AC input, immediately there was an electrical surge and then my UPS failed to function after that. Now after the replacement of MOSFETs I got my UPS working but when I connected to the input again my UPS stopped working immediately after that. Please any help me. I would be grateful!

  54. please post connection of a selector switch or changeover using MCB

  55. Hi I have connected mu UPS to my lights circuit breaker and one plug circuit breaker. During load shedding it worked for an hour and half and then tripped. There was a red light with a continuous beep. When the power (load-shedding) was restored I was not able to put my lights on nor was there any power going to the on plug circuit. I have been told that I must unplug my three pin from the UPS and plug into any other plug point for my lights to work on Eskom power. Is there any other way.


  56. Our UPS is exact with this diagram at our home.
    when we switch on electric water pump motor, ups behaves as WAPDA main light is off. and starts showing to dischargin (i.e. there is no light incoming to ups )

    Same case for complete discharging and suddenly light comes, we on fans connected with UPS. UPS then again showing offline (even main WAPDA light is present)

  57. Srinivasan Seshadri

    Please let me know a dealer in Chennai who will undertake to carry out the installation of an automatic UPS System for my home use, as per the diagram that you have published.
    thanks and regards.

  58. how can i make a separate connection for my inverter and my refrigerator, please give diagrams

  59. Hi thanks allot, i have a question if we want to connect invertor in a home which has three phase connection, then what will the automatic circuit diagram

  60. thanks very helpful diagram ..purchased new inv & battery yesterday..i will install it myself.

  61. give me information how to connect a inverter of house wairing…… plzz short cut solution

  62. How to connect a switch board to both inverter and main line .when power is not available then inverter use and power is available then power use.

  63. I want information about symbol on ups

  64. This is some what useful but still don.t understand.
    I have inverter connection in my home ,when raw power goes down,inverter come up automatically.
    When raw power is there it will show charging.
    I want to know below
    When i remove power plug to inverter from raw power,all the power is going down.

    after battery fully charges ,i want to remove charging to battery.
    How can i do this,need immediate help

  65. I have APC bx600ci-in ups (600v-300w) & it is old while changing battery I got electric shock from battery wire, even I have tested with Tester itcis showing current in battery wires when it is charging…itvis suppose to be DC vote then why I am getting shock while touching..is it problem with ups or itvis normal & I’m trying to connect external battery what max amp of battery I can connect to UPS..

    thaks in advance…

  66. I have APC bx600ci-in ups (600v-300w) & it is 3year old , while changing battery I got electric shock from battery wire, even I have tested with Tester it is showing current in battery wires, when it is charging…it is suppose to be DC volt then why I am getting shock while touching..is it problem with ups or is it normal & I’m trying to connect external battery what max amp of battery I can connect to UPS..

    thaks in advance…

  67. kindly put some diagram of inserting wire in plug ( inside the plug)

  68. Dear please send me your contact no. i want to discus something about ups with you

  69. UPS not working during load shading. I’ using neutral directly from main supply and controlling phase from UPS. It works efficiently when main supply is available but when main supply breakdown, UPS also get off.

    Please advise your precious opinion.

  70. Sir,
    I am asking some of the electrians in my area, most of them are not recommend the Method as they said it will be not safe because of common neutral line as it will produce inverter neutral feedback which can cause severe damage.
    Is it true?

  71. What happens if Inverter fails or not working condition …..

  72. Thank you very much for your good intimation about generator wiring diagram to main supply!!!!!!!!!!!

  73. Sir pleas show me a invertor conection through a two way switch

  74. Very informative and helpful information sharing through your blog.

Leave a Reply

Your email address will not be published. Required fields are marked *