How to connect portable generator at home?

By Bharat Ribadiya -
Inn this article you will learn about how to connect a portable generator at home with different methods and their limitation or which care you have to take while installing the portable generator. We recommend you that we assure your connection with skillful electrician. Following three ways we can connect the portable generator. Please read all the details carefully.

Method 1- With separate MCB

This connection diagram for portable generator connection with separate MCB. First thing you have to do is dis-connect the main supply completely by turning off main switch and MCB 1. Now, connect portable generator with three pin power inlet power plug and connect this plug to MCB 2 as shown in figure 1. 
Figure 1- How to connect portable generator at home
Operation and Working:

Case 1- When power supply is available from power source

When main power supply is available that time power will flow as shown as in figure 2. The blue doted line shows the direction of power flow. Here, generator is in stand by mode.Here, the first MCB is turned ON and  second MCB should be OFF.

Figure 2- Case 1, When main power supply available
Case 2- when power supply is not available

When main power supply is not available that time power will flow as shown as in figure 3. The blue doted line shows the direction of power flow. Here, the first MCB is turned OFF and  second MCB should be ON.
Figure 3- When main power supply is not available
[warning title="Warning message" icon="exclamation-triangle"]-If the second MCB is “ON” in the above operation, i.e. Both MSBs switch ON the same time. Then; When Power restore, it may damage your generator or burn the whole system that can cause dangerous fire and explosion.

-When main electric supply not available, Generator will send electric supply back into main cable which may overload the generator and may give shock to electrician who work/repair in other homes and utility power lines [/warning]

Method 2- With Change-over switch

To connect portable generator at home with change over switch, first you have to install a change over switch having rating about 65 A beside  main distribution board. Now, connect the main power supply to change over switch for this select a suitable size of wire then connect a portable generator with 3 pin socket  to change over switch. It is ready for supplying power when main power supply is not available.

Figure 4- With change over switch
Method 3- Direct install with power plug

This is a very simple and most dangerous method to connect a portable generator at home. In this method connect generator directly to 3 pin plug at home. In the case of main power failure, first dis-connect or turn off the main switch and connect the portable generator with the plug.
Figure 5- Connect portable generator directly
In the case, when main power supply is available from source that time power will flow as shown in figure 5 and generator are in stand by mode and but when main power source is fails to supply power that time power will flow as shown as in the below figure 6. The blue arrows shows the direction of power flow. Here, The MCB should be OFF.

If the second MCB is “ON” in the above operation, i.e. Both MSBs switch ON the same time. Then;
When Power restore, it may damage your generator or burn the whole system that can cause dangerous fire and explosion.
[warning title="Warning message" icon="exclamation-triangle"]-If the second MCB is “ON” in the above operation, i.e. Both MSBs switch ON the same time. Then; When Power restore, it may damage your generator or burn the whole system that can cause dangerous fire and explosion.

-When main power supply is not available, the generator will may send electric power supply back into main line that may overload the generator and may give shock to electrician who work/repair in other homes and utility power line.

-If you don’t know the safety rules of electricity, then do not connect portable generator to home power supply system. [/warning] [alert title="Alert message" icon="info-circle"] The author will not be responsible for any losses, injuries, or any damages from the using this information or try to connecting the circuit into wrong format. So please! if you don't know safety and precaution then do not try it. Electricity is very dangerous. Be careful! [/alert]

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