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Requirements- Required Materials Number Single phase energy meter 1 Two pole, 100 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 As shown in figure, connect the single phase meter, MCCB as a main switch, DP, SP, RCD of each floor. Do not forgot to connect earthing as well as neutral to RCD. Use the circuit breaker with proper rating. In single phase wiring phase to neutral voltage is 230 V for India and for other countries it will be 120 V. Distribute the electrical wiring of each floor in three to four circuits because if a circuit breaker of a circuit trip due to fault then all loads will not dis-connect at same time. i.e. In a three floor building, yo...

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...

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 p...

Types of battery connection: 1-Series connection 2-Parallel connection 3-Series-parallel connection 1-Series connection of batteries In the shown in fig A the batteries are connected into the series. In the series connection of batteries the positive terminal of battery is connected with negative terminal of other battery. By connecting batteries into series, current will be same throughout the circuit but the voltage is different and the total voltage can be found by addition of all voltage. V = V1+V2+V3+.......Vn In the figure, the two 12 V, 100 Ah batteries are connected in the series so, total current will be in circuit is 100 A but voltage is 24 V (12 V + 12 V). 2-Parallel connection of batteries In the shown in fig B the batteries are connected into the parallel. In the parallel connection of batteries the positive terminal of battery is connected with positive terminal of other battery and negative terminal of battery is connected with the negativ...

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 Wat...

Voltage drop in Cables Voltage drop is a important factor to consider while selecting cable size. Every cable have internal resistance and this resistance is directly proportional to it's length and inversely proportional to it's diameter[R = ρ (L/a)]. It can be neglect in small diameter and small length wire but it must have to consider in long cable or big diameter cable. As per standard voltage drop between power supply terminal and installation not be increase above 2.5% of supply voltage. i.e. If supply voltage is 220 V then voltage drop not be increase then the 5.5 V. Voltage drop also occur in between installation point(distribution box) & sub-circuit or final sub-circuits and this drop should be half of that allowable voltage drop. i.e. 2.75 V of 5.5 V. Their are two method to describe voltage drop, The SI(System International and Metric System) and FPS(Foot Pound System). In SI system voltage drop describe in A/m and in FPS system it describe as 100 feet. T...