Why we use 220V, 50Hz AC at home instead of DC or other voltage?Full Explanation.

Why we use 220V, 50Hz AC at home instead of DC or other voltage?

Why we use 220V, 50Hz AC at home instead of DC or other voltage


According to the nature of the current, we have two types of electric power supply one is AC and other is DC. We know that AC is used for transmission and distribution purpose. There are different different voltage level specified for transmission and distribution of electric power. But we have use 220V, 50Hz AC in our home. Today we are going to know Why we use 220V, 50Hz AC supply, not DC or not any other voltage level or other frequency.


Why we use AC instead of DC at home?

  1. As the AC is used for transmission and distribution purpose or in other words, as the AC supply is given to our home or office so we use the AC Supply.
  2. As we know that the conversion of DC to AC is more complex than AC to DC, we use AC supply at our home because in our home or office some devices need AC and some devices need DC. So we can easily convert AC to DC and use it.
  3. As we know that we cannot increase or decrease the voltage level of DC easily so use AC because if any device needs more voltage than our given supply voltage we can easily increase the voltage level by a step-up transformer.
  4. Many of us use Stabilizer in their home or office which helps to maintain the voltage level when low or high voltage occurs. And the Stabilizer working with the transformer which step-up and step-down the voltage as the requirement. I mean to say that if we use AC there is a facility to overcome high voltage or low voltage problems in our house.








Why we use 220V supply not other voltage levels?

Suppose a Load needs the 440W power(P) supply to work. If we use the voltage(V) 100V then the value of the flow of current(I) will be (440/100)=4.4 amp from the equation P = VI 
Now if we use 220V voltage then the value of the flow of current will be (440/220V)=2 amp
So it is cleared that if we use high voltage then the flow of current will be low which gives the facilities,
  1. The thin conductor can be used.
  2. Low heating.
  3. Low copper loss.
But there is a problem that if we use high voltage it is not safe for us. So keep these reasons in mind we use the standard voltage level 220V




Read Also: What is Electric Shock What causes an electric shock Current or voltage?





Why we use 50Hz supply not other frequency?

If we use the low-frequency supply then the lights are connected to the supply will be blinking slowly and our eyes will catch the blinking of the light. But if we use high-frequency supply then the lights are connected to the supply will be blinking fastly and our eyes could not catch the blinking of the light. 

But there are some problems, if we use high-frequency supply then the Eddy Current loss and Hysteresis loss will be high and the life of lamps also will be decreased.
So keep these reasons in mind we use the standard frequency 50Hz.



Read Also: Transformerless Power Supply. Why Transformerless Power Supply not Safe?



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Why we use 220V, 50Hz AC at home instead of DC or other voltage?Full Explanation. Why we use 220V, 50Hz AC at home instead of DC or other voltage?Full Explanation. Reviewed by Author on 09:05 Rating: 5
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