Three phase electrical wiring system for home & multi-floor building

By Bharat Ribadiya -
In this article you will learn about how to do three phase wiring in home. Generally, the elctrical supply provider company install single phase energy meter for where requirements is 7.5 kW load in domestic areas but if this limit exceeded then they install 3-phase meter. For this we required following things.

Requirements-
Required Materials
Number
Three phase energy meter
1
Three pole, 63 A, MCCB
1
Double pole, 63 A, 30 mA, Trip current RCD
3
Double Pole MCBs, 63A
3
Single Pole, 20A, MCB
6
Single Pole, 16A, MCB
3
Single Pole, 10A, MCB
6
Distribution board cases
3
Cupper strips for MCB Common connection
3

Here, the connected load is single phase. their is no 3 phase load connected to the 3 phase system. The 3 phase wiring are used because our load is more then 7.5 kW. Now, let's start the procedure how to install 3 phase wiring for your home.

Figure 1- 3 phase winding in home
As shown in the figure, connect the 3 phase energy meter, MCCB as main switch for incoming R,Y,B phase from utility pole. Now, connect that the outgoing R,Y,B with SP, DP, or RCD and also connect neutral as shown in figure.
Figure 2- 3 phase wiring in multi floor building
As shown in the figure, connect the 3 phase energy meter, MCCB as main switch for incoming R,Y,B phase from utility pole. Now, connect that the outgoing R,Y,B with SP, DP, or RCD and also connect neutral as shown in figure. Do not forget to connect the earthing as shown as in the figure.

In the 3 phase wiring system, the single phase and three phase can be connect as shown as below figure.
In the three phase wiring system the phase to phase voltage will be 440 V and phase to neutral voltage will be 230 V (In India) and for USA it is 208 V & 120 V respectively. If circuit breaker of any floor is ON then it will not dis-connect the load of other floor. If you use one circuit rather then the three, then if load increases, more current will flowing through cable that makes cable overheat as well as voltage drop also increase. Therefore the rated voltage will not reach to the end of load. Due to overheating their is chance of fire.

[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]

Popular posts from this blog

How to control One Lamp from three/six different places and working principle of intermediate switch?

By Bharat Ribadiya -
Image
In this article we learn about how to control a lamp with 3 different switches at different places. This is very useful. For doing this we required two 2-way switch, 1 intermediate switch and a lamp. Connect all these as shown as in the below diagram. Fig.-1 In the above diagram the lamp is on because the circuit is in closed condition.To understand easily the circuit diagram for this, is given below.  Fig.-2 In this case the lamp(bulb) is in off condition. So, the circuit is open condition. Here, one more example is given.  How you can turn on/off a lamp or bulb from six different places. For this we required four number of intermediate switch, two number of 2 way SPDT switch and 1 bulb. Connect all these components as shown as in the figure below. Fig.-3 What is Intermediate switch , its construction and working principle? Fig.-4 An intermediate switch have four terminals. Because of this terminals it is possible to change the flow of the current fro
Read more

Automatic and manual UPS system wiring for home or office with circuit diagram

By Bharat Ribadiya -
Image
Automatic UPS system wiring for home or office This article is about how to connect a UPS system in our home or office and this is very useful information.  The below circuit diagram shows the how to connect a UPS from our main supply to appliance(load). This circuit diagram is for in case of falling the main power supply and you want to supply power to specific appliances, TV, AC, laptop etc. in your home or office.  As shown as, two rooms are connected with main power supply.  Here, you don't have to connect the neutral wire connection from UPS because it's already connected the phase and neutral wire from the main power supply with the same point. To connect UPS first you have to remove the connection of phase wire from the main distribution box(from SP,DP or CB) of those rooms which you want to connect with UPS. By doing this(connect with both supply), we can use the power without interruption. If main power fails the UPS will provides the power to the
Read more