Why should we house 220 volts?

Why should we house 220 volts? Strange question - you say. How to do without electricity? With so many appliances and electronics. And I'm not talking about electricity in general. This is the alternating current voltage of 220 volts and a frequency of 50 hertz in the socket at home. For example, a modern car is not less flat packed with electronics and electrical engineering. But all he had, even a vacuum cleaner, coffee maker, refrigerator powered by direct current to 12 volts. And nothing!

And at home we have with large losses to convert the current from the electrical outlet in the home needed to supply low voltage direct current electronics. Touch charger mobile phone during work. It's warm. So, lost much more energy than goes directly to the battery charging device. What would you say if the currency exchange would take as a commission exchanged half the sum? But power supplies televisions, computers, radios and other equipment do exactly that!

It would be much better if the house into a power outlet as soon as a car, a DC voltage of 12 volts. And safer. A stove and appliances, you ask, and lighting the lamp? Or a washing machine? But the road experience shows that they can be constructed and powered by 12 V. This will not affect their performance. On the contrary, they will be safer. Just now, they rely on the fact that we have at home. And all electronic equipment simply will not power supply cheaper - not only do they consume more electricity, but they themselves are part of the price.

So why in our outlets has taken a high voltage and alternating current? Moreover, the first source - [url=http://shkolazhizni.ru/archive/0/n-12227/] Voltaic pile 1,111,113. - Gave DC. The fact that high-tension alternating current advantageous to transmit over long distances on power lines. The more current flows through the wire, the greater the loss due to heating. Everyone at school know the formula that electric power is the product of the current value on the magnitude of stress. It shows that the higher the voltage, the less current is required to transfer the same power. Voltage transmission lines reach hundreds of thousands of volts. And to increase the voltage, and then reverse downward uses transformers that require AC power.

And why the final voltage of 220 V or 110 in some countries? It is up to these values, it falls on the district substations and then distributed to their homes. Even 50 years ago, the only electronics in our homes were tube radio and television. For their power required is just about such stresses. Now the number of the last used radio tubes - electronic tube televisions and computer monitors is rapidly declining. It's time to think about transferring electricity to low voltage DC. Yes, the thickness of the wiring will have to increase, but it will pay off many times reduction of losses on the conversion of electricity and increase electrical safety.