Learn how to circuit UPS or Power Inverter with household appliances like fans, tube lights, energy savers, computers etc. Connect your office equipment like servers, desktop computers and surveillance cameras to make sure that they are up and running in case of power failure or black out. Any kind of large and small devices and electrical equipment can be wired with UPS or power inverter as long as their combined load is within the capacity limit. So take precautions and connect devices that won’t overload the power backup system when power fails.
Method No. 1:
Without connecting “output neutral” of UPS or Power Inverter with appliances and directly providing common neutral of home, apartment or building.
UPS / Power Inverter Wiring Diagram 1
– If the above circuit does not work, take a piece of wire and connect “output neutral” of power inverter or UPS with neutral wiring of home. The circuit will be closed and appliances will start working. Now, if you do this, never ever, I repeat never ever reverse the polarity of input or output or you will not only cause the short circuit but also damage the UPS or Power Inverter. So, be careful.
UPS / Power Inverter Wiring Diagram 2
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Troubles with single line / phase wiring & Solution:
Sometimes, you need to disconnect UPS from the circuit. In that case, label the plugs for live and neutral wires and carefully connect them back. In this kind of wiring, make sure that input and output of UPS are aligned. Otherwise, the circuit will not be complete and UPS will not work. See the diagrams below for more understanding:
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Method No. 2:
Circuiting UPS or Power Inverter with appliances by supplying both neutral and live wires coming directly from its output.
UPS / Power Inverter Wiring Diagram 3
– This is the simplest and straight forward method for connecting appliances with power inverters or UPS’. This type of wiring is especially required for those UPS’ which can not work with only phase wiring because such UPS’ are designed to disconnect both live and neutral circuits of input inside them when output is switched to batteries backup. If you want to connect sensitive electronic devices like servers, computers, TVs, sound systems, media players etc, you should prefer this type of wiring, or simply plug in using an Extension Cord.
Note: Red colour indicates the phase/live/hot/electricity providing wire and black color indicates the neutral/cold wire. Red arrows are representing phase terminals of UPS and black arrows are representing neutral terminals.
Safety: Methods described here are for reference purpose only. Make sure you get your UPS or Power Inverter circuited by a trained personnel.
Raj
Hi, Thanks for the great information. I have luminous inverter installed in my house. I checked the ground is working proper or not by connecting phase and ground using small wire inserting on any wall 3 pin socket and checking the current in any other wall 3 pin socket. The ground is working fine when main current is flowing in my home. But when on running battery if I use the same above method to check the ground, the current will be flowing in both phase and neutral but not in ground pin. I am using tester to check the current. Can you please help me why this is happening. I will provide more information if you need. I am not sure the method I am using to check the ground correct or not. Thanks
Talal A.
If tester is glowing with neutral, there is stray voltage in neutral caused by inverter. It’s not dangerous. Your appliances will work fine.
Lamanto T. Somervell
Sir,
Where I have to connect the output phase/live wire from inverter to the circuit breaker?
To the input of the breaker OR to the output?
Talal A.
Input.
PRASAD
Respected Sir, I have used the first method i.e, single phase line o/p to backup my appliances. But due to power surge on a rainy day, my inverter got damaged. How to protect my inverter from power surges? Should I go for the second method ie, neutral and earthing along with phase wire at the o/p of inverter. Will it help power surges and protect my inverter. Awaiting for your valuable reply.
Regards
Talal A.
Earthing won’t protect your inverter or other electronic devices from power surges.
There are surge protectors available in market and online. Buy one and route inverter input through that. If ever surge happens due to the lightning strike, it will cut off the supply and your inverter will be saved. You can also use that surge protector with other devices.
Manmohan kumar jaggi
sir i have three electric power supply meters in house different portion
i have one 24 V, UPS i like to connect one UPS to different meters,
can i Connect UPS taking phase from one meter and neutral from other meters ?
Talal A.
Neutral is usually same for all the meters if wires are coming from same main supply lines.
Prasad
Sir, I have connected my Luminous Zelio inverter using the 1st method. ie, only by connection single phase o/p. But I observed that when I pulled back input cable of the inverter and checked with tester both live and neutral pins got current in it. What can be the reason? I am running my LED TV and computer apart from other appliances. Is this 1st method safe or should switch to 2nd method to avoid any damage. Eagerly awaiting for your expert advice.
Talal A.
That’s due to the stray voltage. Most inverters produce it.
Jam Azmi
Hi , I want to install Inverter in my office , There is only one computer and 4-5 sets of Tubelight and 2-3 Fans. I want to connect Inverter to all these at office. Can control usage by putting off unwanted lights and Fans. I require to use only One desktop Computer , 2 light and One Fan. How do I wire it. What I have in mind is connect the Inverter between Main’s wire.
Talal A.
most inverters are designed to work by just supplying phase from output. The input neutral will automatically complete the circuit.
David
sir i have followed your professional expertise on inverter out put connections, never the less i have a question, please sir can the connection be reversed without methed 1 / 2 line connection through same main wall socket of input for output distributions. Thank you sir.
Talal A.
No
selva
Can I connect linein and lineout with the same line connection, means that when power supply is there battery will be charged when power supply off battery charge is supplied to light and fan its possible ?
Talal A.
No. It’s not safe. it will damage your power inverter.
Power input will be fed from power source (Distribution box or normal power socket) and output will be connected to fans and lights with separate wire. See detailed description above.
thiru
In my Home , we have 3 Ph supply from Elec Board. Loads are connected in each Phase through a Rotary switch. If any Phase fails, Load connected to the phase will be transferred to live phase through Rotary switch.
We also have single Phase 800 VA UPS connected to 1 phase. Few tube lights and fans have been connected to UPS.
Do we need to earth the neutral at our meter or at UPS output neutral?
Is multiple neutral earthing a good option ?
Talal A.
Did you supply just phase (live wire) to lights and fans?
The UPS input will automatically complete the circuit (if it supports)
Earth input or output whichever you want.
MOHAN NEGI
i had posted a query about connecting 2 inverters to a single battery.
i just want to add that-
Suppose i disconnect the first floor inverter & connect a single wire from the ground floor inverter to the first floor same as that single wire from inverter to the ground floor inverter. means two wires from inverter output from same point & one going to ground floor & other going to first floor.
will it work & not cause any problem ?
Talal A.
Yes you can wire two floors (even with different electric meters) with single power inverter. You need to supply phase (live wire) to all the appliances you want to run on both floors. You also need to connect output (or input) neutral of inverter to the first floor neutral to complete the circuit.
MOHAN NEGI
i had tried it & got it done by electrician but now i see that my ground floor meter is showing Earth leakage & Rev LED is also on many a times. means all the three LEDs are glowing . what should be the solution
Talal A.
Turn off all lights and devices attached to inverter and see if electric meter slows down.
Inverters often produce stray voltage in neutrals that cause the problem.
If problem persists, undo the wiring and buy new battery for other inverter to avoid any troubles.
MOHAN NEGI
Your technical advises are really interesting & helpful. thats’why i also want to ask the solution of my problem. hope you will guide me
i have 2 different power supplies (different electricity meters) at different floors & both are having inverters. one of my inverter battery is down & needs replacement. To avoid extra expenditure on battery can i connect both inverters to a single battery & how ? if not then why? & what is the solution
Taimoor Ali
Sir recently installed APC UPS in my house. With double lining of separate neutral. But in my UPS socket, when AC is activate tester screw driver shows no charge when switch is off and charge in phase terminal when on. But when UPS is active, tester shows charge in both terminal regardless switches are on or off. What could be the possible cause of this issue?
Talal A.
That’s due to the stray voltage in input/output neutral.
dinesh
i am using 1100va luminous zelio inverter i plugged inverter 6amp 3pin to my room switch board socket, i draw 1mm size wire from main DP box,my question is what’s the right size of wire that i should use from DP box,because in that room with same switch box another electronics load of 600watts is connected. During summer in our area voltage drop to 120 volts. if i give maximum load on 1mm is it ok?
Talal A.
The quality of wire matters the most. This much thick wire may bear the load that you mentioned if it is made of pure copper.
But i will recommend to use thicker wire for safety.
Imran
Sir, I am using homage UPS and have following problem since last night. Light from Grid Station is available but appliances (Bulb and Fan etc) are still running on UPS backup power supply. I tried to disconnect UPS input power supply and tried to complete circuit with simple plug to run on appliances on main power supply, but still only things that are not backed up with UPS wiring are switching on and remaining which are wired to run UPS backup are not running on main AC power supply. Can you suggest what can be the problem. Is there possibility that the AC power socket for UPS input is no more working and needs to be replaced?
goody
cool
chaitanya
Dear Sir,
I am also having the similar issue. My house having two portions with two separate mains. But, I have connected my UPS to both the portions, when ever required I am switching on and off those appliances. But, input power to the inverter from one meter only, that particular portion I am getting more bill when compared to other portion. The entire load on that meter. Can I connect my single ups to both the meters. you have suggested ” Divide load over days” could you please elaborate.
Talal A.
Install a ‘change over switch’ at UPS input. The change over switch can be fed two mains. Run UPS on one main for 15 days and then switch over to other main for other 15 days.
Jyotiprakash khuntia
I am having a inverter which is already connected in my home now my load demand is increasing so State electricity Board has told to take another Supply new Supply.But My old Supply is connected to Inverter can I connected this new supply to my inverter.The Purpose is Ground floor should have Different Supply and First Floor should have different supply and billing will be different but Inverter will be common .
Talal A.
You can divide the load over days like running inverter for 15 days on one supply and another 15 on second one.
shan
I would like to give the inverter output to certain circuits like light circuits only in the main DB. so when power fails that particular light circuits will not fail .for this what to do?
Rohit gupta
Sir i am using my ups with pc. From yesterday it isn’t working. When i checked it with tester both of the terminals showing current. Even in circuit components like capacitors transistors. On the o/p side both terminals glow. what to do????
alfred
Can I connect linein and lineout with the same line connection, means that when power supply is there you can use more load than the capacity of inverter ?
Talal A.
No
ANIL SHARMA
Sir,
I want to know that my home has inverter wiring, but doesn’t have inverter. Two wires are connected with the different switches. It is always disturbing my automatic switches, they get spark and some electric appliances stop working. I want to close this sparking circuit. Please give me solution.
Talal A.
Wiring might be shorted.
Tidy
Sir I want to know where to connect the out put phase of the invetor in the DB ‘ should it be down the mcb
Rahul Krishna Agarwal
I have a Luminous Square Wave Inverter 975 VA connected with Method 1 ie. Single live wire connection. Many a times, when I leave home for long, I switch off the output from Inverter and keep the input line ON.
The line installation has a 10 Amps MCB. It Trips many a times under this condition causing likely hood of slow battery discharge.
Can you please tell me what can be the cause and solution. All power connections remain OFF during this.
Talal A.
Even flooded lead acid batteries can retain charge for over a month. VRLA batteries have better tendency to retain charge. So just charge the batteries to full and shutdown inverter completely before leaving.
sushen
sir
I want to know inverter output wire (mm) what type of brand wire use in my six room and one Hall I actually not know?
Sir plz
Talal A.
Depends on your needs. Usually ordinary copper wires that are used for wiring in homes will serve the purpose.
Tahir
Hi,
I wanted to ask why is it that UPS works only when its is plugged into the socket in a certain direction, and not in the opposite direction? I understand that electricians only give one wire (phase) from the appliances to the UPS backup. But how is it able to provide voltage to the other wire? Does it get one wire from the input and the other from the output? I have noticed that the UPS doesn’t work if the input cable is pulled from the socket, but not when the socket switch is simply turned off. This suggests that there must be some phase relationship between input and output of a UPS, but I still don’t understand the concept very clearly. Could you please elaborate on that?
Thanks a lot!
P.S: I’m not trying to install a UPS or anything. I only wish to understand the theory behind it.
Talal A.
Phase is provided from output. Neutral is provided by input. The circuit completes and devices start working.
Most power inverters are designed to close the circuit with only phase output and neutral input.
In your room switch boards, the switch only cuts off the phase supply to socket which means neutral is always available.
Tahir
Thanks a lot, Mr. Talal. I appreciate it
sai Sukanya
Does the appliances connected to an inverter work when inverter is in off condition
Talal A.
If backup button is off, appliances should work with main power source.
Waqas
Hi. I have a cyberpower UPS 720 watt UPS with Phoenix battery. yesterday the UPS started beeping and showing that its overloaded but it wasn’t. I turned off everthing on UPS but it still wouldn’t stop beeping. There is only wire in output of UPS. what can be the issue? and how can it be resolved.
Talal A.
Try pressing trip reset button. If problem persists, take it to service center.
Syed Qadir Shah
Dear you technical advises are really helpful as I am thoroughly following your threads .
I need advise on ;
I bought APC Sine-wave ups (48V)
the Electrition/shopkeeper told me that after you plug in the main wire (input) , then take a Tester and see in the Output which of the two wires is phase wire , then connect the phase wire to the socket’s phase wire to deliver the Output to home.
My question here is that , after plugging in the ups wire to power socket, I took the tester to see which one in the output is phase but I found out that both output wires have current in it . My batteries are not attached while doing this as I have 2 batteries and waiting to buy 2 more to make a 48volt battery in series)
So, do you think after connecting the ups to 4batteries , the output of you ups will make one phase and other neutral ?
Talal A.
Make sure you don’t short the wires (phase and neutral connected together) as that will damage UPS. If both output (phase and neutral) are lighting the tester then neutral has got stray voltage in it. Usually Live and neutral is mentioned on output of every UPS. You just need to find correct input phase (if it is not mentioned). If you have got multimeter, you can easily find what is what.
Syed Qadir shah
Thanks a lot Talal , it’s a stray current, if you have time then just reply me inshort how to remove the stray current in my APC ups,
? your advises are wonderful ,,, stay blessed
Talal A.
Earth wiring is the only solution to this problem.
Asif Ashraf
hi,
with reference to below post, is Stray voltage dangerous for devices? or should i simply avoid it?
I have homage inverter installed at home. When Main Electricity OFF inverter work perfect but there is only 1 problem that is small voltage or current is still there in those sockets where inverter is not connected and when I pull inverter power plug or switch OFF completely then that voltage or current disappear.
I performed some tests to pin point the issue but can’t find the issue.
I switch OFF inverter from power button on inverter and voltage or current disappears.
I disconnected input L (Red) wire but inverter is ON (backup mode) and voltage or current still there.
I disconnected input N (black) wire but inverter is ON (backup mode) and voltage or current disappears.
This happen only when main electricity is OFF.
thanks.
Talal A.
That stray voltage is produced by your inverter when it is providing backup. Stray current is not harmful for devices but can be for humans. Proper earthing can help you get rid of it.
dhanu
sir please tell how to connect the UPS.
both the switch boards are in different rooms (amaron inverter 800VA)
Praveen
I have installed elcb in my home and is working well. It is tripping when Connected to ups supply. If I use without ups means connected directly to mains it is fine. What will be the reason.
Kamran Haider
Thank you very much for this wonderful information. I am not technical person but I need your expert solution on my inverter issue. I have low voltage issue on main line 140-160. I have a 5kva pure Sinewave inverter installed with common neutral method. To improve voltage I added one 10kva stabilizer and connect inverter on it. When grid is on I get no improvement in voltage but when electricity goes all fans lights becomes brighter on battery power which I actually want during my grid power.
Main grid–10 kva stabilizer–5kva inverter–appliances
Talal A.
Your stabilizer is useless. It is not stepping up the voltage properly. Change that with some quality product.
Arul
How can i check my inverter is Pure sine wave or Square wave, it might be a straight forward answer by using the model number we can find but its old one and i am not able to find online. The inverter is Brila Power 800 VA Home Ups. Is there any way to check without taking the unit to service center.
Talal A.
Use Oscilloscope for that purpose.
judeson
Use a multimeter which is not a true rms . If the multimetre shows wrong voltage relative to the true rms meter then it is not a pure sine wave
Rahul Krishna Agarwal
Normally in case of square wave Inverter, on inverter power, there will be noise in Fans specially when they are running slower.
Aftab Alam
I want to connect a street light load on my existing inverter which is connected to my house load. That street light should on only when main power cut and should be off when main supply is there. How to connect, i have luminous LB UPS.
Ali Khan
I have homage inverter installed at home. When Main Electricity OFF inverter work perfect but there is only 1 problem that is small voltage or current is still there in those sockets where inverter is not connected and when I pull inverter power plug or switch OFF completely then that voltage or current disappear.
I performed some tests to pin point the issue but can’t find the issue.
I switch OFF inverter from power button on inverter and voltage or current disappears.
I disconnected input L (Red) wire but inverter is ON (backup mode) and voltage or current still there.
I disconnected input N (black) wire but inverter is ON (backup mode) and voltage or current disappears.
This happen only when main electricity is OFF.
Talal A.
That’s the stray current.
Ibrahim
I myself have wired my two rooms. Now I have purchased luminous ups and want to install in my house with method-1 or method-2 as explained by you above. I understand both diagram. I just want to clarify from you that I will have to take Single live wire from UPS out put and twist with fan switch terminal and bulb switch terminal point or twist with live wire which are coming from main board to Rooms. (in this case two live wire twist and during power failure ups live wire will work and during power from main board it stop working. Am I correct? Can I use method-1 or method-2 for ups wiring in Rooms and kitchen which method is so safe. In method-1 is it possible to reverse current? Thanks
Talal A.
Separate live wiring needed.
subhash kumar
Now I take
vishant
how to remove inverter connection from a socket. only two wires are connected + earth.
Talal A.
Label them before removing to avoid any mistake while reconnecting.
rakesh raman shukla
My inverters both battery terminals show current while checked with tester and also the cabinet. Is it ok or there is a chance of power loss?
Talal A.
Earth wiring will fix that issue.
Digam
Hello Sir
I installed a luminous inverter of 800va, using 1st method mentioned. Now what whenever the mains goes out the inverter cannot start by itself and instead it shows overload. Now when i switch of the isolator and restart the inverter it works and i get the current. But still then inverter blinks every after few seconds “on main” led blinks on and power supply is also blinks along with that.
Priangsu Baruah
sir I am facing a continous problem during rainy season, when rain comes with lighting and thunder it is obvious my inverter will damage, but at the same time nothing goes wrong with the other peoples inverter even it is switch on. I purchaced 2 inverter of different brands but no use, and also changed its previous place but as it is. Please suggest me some solution. Thank You.
Talal A.
Use surge protector.
Jay
Plz anyone confirm whether output from ups with one wire can be used if ups is connected to a stabilizer.
Rajat
I had connected by method 1 but room light is getting on only in case of supply but when supply is off it gets off suggest
AMRESH KUMAR SINGH
Sir,
When invertor light points get on. Rccb get trip. Method 1 wiring is being used. Please send reason…
atul
My house has 2 power connections from 2 seprate ac mains . Generally there shalll not be power cut for both sources together . Can i use 1 battery & 2 inverters to back up for each mains.
Moses Onilede
Hello Sir
I recently installed a 5kva Genus inverter with 8 batteries in my house. It was installed like in Method 1. However, I observed that sometimes, when the public main goes off, the UPS would go into “Short Circuit Protection”. The occurrence is becoming frequent and is of concern to me. What can I do about this? Thanks.
Talal A.
Check the wiring. Make sure there is nothing shorted among appliances. Check for overload as well.
prefeaksi.xyz
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??
NAGAPPA
only line is series to home through inverter, when we connect neutral also to home from ups output to grid neutral (loop) in that case neutral is reverse till to grid when grid supply is failued, in that case what happen?
Hammad
hi,
How to connect only specific appliances like bulb or fan and leaving the rest, In a single wire system??
Talal A.
Get it done from trained personnel. Won’t recommend to do it on your own if you have no experience before.
Hammad
I have wired my room but not sure about selective ups wiring.
Talal A.
Most inverters available in market can work on single wiring i.e. you just need to supply live. Devices and appliances automatically gets neutral from inverter input.
joseph
sir, i use the second method usually for my installations and it works out fine. but i just installed a 5kva luminous inverter but when there’s no electricity supply the inverter indicates power at the input voltage and when i disconnect from the mains my tester indicator comes on from the input of the inverter. please what can i do
Talal A.
Stray voltage may be
JUNAID Ahmed
Sir , i installed RCCB in main Supply . i have ups. If i get a shock RCCb trips. Then ups activates.( ups wiring is done as method 1 — single wiring system). how the ups will trip. What is safty device i have to install and where.Please reply.
Talal A.
Rccb should be enough for the purpose.
Naresh Singh
Dear friend ,
Rccb is connected in main . the connection of UPS always should be in series . means Disconnect your mains from MCB first connect it to UPS i/p through sufficient mcb
Take o/p from UPS & Connect it to mains i/p .so if there is any fault occur or leakage current will pass your RCCB will Trip & the whole supply will isolates . other wise it will be Risky,
Regards
Naresh Singh
Galaxy Solar India Kota
Rajasthan
8764179624
judeson
Can u give me circuit for it
Ashish
Please give circuit diagram.
awais imam
is there any circuit for reverse current protection towards output of UPS if a ups is installed with common neutral for two homes ….. incase the second one reverses polarity from mains of his home ???
shankar
hi i had the same dout how did u connected now ?