What is diversity factor and how to calculate it?

By Bharat Ribadiya -
The whole load is not use at a same time in office or home. We do not use the all equipment at same time. There are some equipment are ON and some are OFF. In home we do not switch on all the lamps, fans, AC, water heater, electric iron etc. Therefore,the diversity factor is need to be consider while selecting wire size for electrical wiring installation. The diversity factor can be calculate by following equation.

Diversity Factor = Total Connected Load / Actual Maximum Load

You can neglect diversity factor in case of final sub circuits where connected all loads not operate at same time.

Example:-In a flat, the max demand of load current is about 85 A and Loads are as follows.

Connected Load
Amperes
Maximum to be expected
Amperes
Three 15 A socket outlets
45 A
100% of 1 socket (15A) + 40% of reaming 2 socket
27 A
Four 5 A socket outlets
20 A
100% of 1 socket (5A) + 40% of reaming 3 socket
11 A
Water heater
6 A
100%
6 A
Lighting points
7 A
66% of load
4.5 A
Water pump
4 A
30%
1.2 A
Air conditioner
8 A
30%
2.4 A
Total load
90 A

52 A


But, by using diversity factor the total required load is about 52 A. So, use 52 A + 20% for future load the total required load current is 62.4 A instead of 90 A for installation of wiring.
                             

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

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

By Bharat Ribadiya -
Image
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
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