Transmitting DC power over a long distance is inefficient. Thus AC supply is a far more efficient to transmit power. According to Siemens it's quite the opposite: Whenever power has to be transmitted over long distances, DC transmission is the most economical solution compared to high-voltage AC.AC is much easier (therefore cheaper) to step up and down in voltage(using a transformer) than DC, and can be done more efficiently than the much more expensive and complex DC step-up/step-down systems. That is why AC is used for power transmission.The main reason AC power is used in most houses is because it can be easily transmitted over long distances. This is due to the fact that AC current can be reduced (or increased) using a transformer. DC power, on the other hand, can't be changed as easily – making it difficult to transmit over long distances.

Why we use AC instead of DC at home : The electricity that is coming to our homes is AC because it comes from a far away power generation plant so the loss of energy during transmission is very less in the case of AC power than DC power. The Peak current value of AC is more than DC. Most of our household appliances are inductive type.

Can DC travel long distances

DC also can't travel long distances without running out of juice. 3)More Power Plants. Because of the short distance that DC can travel, you need to install a whole lot more power plants around the country to get it in people's homes. This puts folk living in rural areas in a bit of a bind.

How far can DC be transmitted : 12V DC Power Max Wire Distance Chart

	24 AWG	12 AWG
DC 100mA	216 feet	3,508 feet
DC 200mA	108 feet	1,755 feet
DC 300mA	72 feet	1,169 feet
DC 400mA	54 feet	877 feet

12V DC Power Drop / Max Cable Distance Chart

	24 AWG	12 AWG
DC 300mA	72 feet	1,169 feet
DC 400mA	54 feet	877 feet
DC 500mA	43 feet	701 feet
DC 750mA	28 feet	467 feet

AC current

By exploring the differences between alternating and direct current, we can see why AC current is the preferred method for transporting power over long distances. It loses less power while traveling and can be converted to lower voltages more easily.

Does Europe use AC or DC

alternating current

Current flowing in power lines and normal household electricity that comes from a wall outlet is alternating current. The standard current used in the U.S. is 60 cycles per second (i.e. a frequency of 60 Hz); in Europe and most other parts of the world it is 50 cycles per second (i.e. a frequency of 50 Hz.).One of these battlefields was electricity, where two very different visions clashed: Nikola Tesla, the proponent of alternating current (AC) and Thomas Alba Edison who advocated direct current (DC).How Dangerous is DC Current If you compare AC to DC, then studies indicate that AC is around five times more dangerous. The human body is naturally more resistant to DC than AC and it has been proven that letting go – therefore escaping the impact of electrical shock – of live parts in a DC circuit is easier.

The wave-like motion of AC power gives this electricity form an advantage over DC power. Because it moves in waves, this electricity format can travel farther than DC power.

Can DC travel further than AC : Generally, AC power is the current flowing through power lines and outlets in households primarily because it can travel farther than direct current. The standard frequency for AC power is 60 Hz (or 60 cycles per second) in North America and 50 Hz in Europe and many other countries.

Does DC voltage drop with distance : Yes, dc and ac Voltages drop along conductors that carry current over distances. The magnitude of the Voltage drop is directly proportional to the circuit current and the total resistance of conductors, connections and the internal resistance of the Voltage source.

Does DC voltage drop over distance

AC and DC low voltage power supplies have limitations as to how far cable can be run before the voltage drops too low for your device to use. The maximum length that cable can be run for low voltage power varies based on these factors.

DC is preferred for long distance transmission hauls and that's where the economics of a DC line really shine. DC is more efficient than AC at high voltages and has lower line losses. The line has lower losses, no reactive power is needed, and the power flow can be fully controlled.12V DC Power Drop / Max Cable Distance Chart

	24 AWG	12 AWG
DC 100mA	216 feet	3,508 feet
DC 200mA	108 feet	1,755 feet
DC 300mA	72 feet	1,169 feet
DC 400mA	54 feet	877 feet

Is Germany AC or DC : Germany supply AC for household usage and short transmission of power like rest of the world. But due to added advantages they are using DC for high voltage direct current(HVDC) transmission over a long distances.