Some countries use V, some V, others V, and so on. Just take a look at the map below to get a clearer understanding of the global disparity:. To answer the question, though—the US does have a higher power supply. Nearly all homes in the US have V alternating current lines at the service entrance to the household as well as select locations within the home.
Some European countries use V, while some specify V; most appliances will accept V however. The appliances hooked up to this higher power supply generally speaking include more energy dependent machines like ovens and laundry machines.
Regular appliances like lamps, laptops, and phones do not need access to this power. Disadvantage: it takes longer to boil water in one's travel kettle. Peter May, St Albans, Herts p. Ian McKay, University of Glasgow, ian.
The power loss in the supply cables will quadruple with a doubling of the current. This is why power is transmitted about the land at 33, volts, to reduce the current in the wires and hence the power lost before it can reach the consumer.
Mike Bond, Luton m. At v, insulation requirements are much less, which makes possible the vast range of small, low-cost connector and switch gizmos available in the US. The US, which started with volt power, actually considered switching to more-efficient volt household power in the s.
Europe had developed its volt now volt system after learning from the American experience, and before any massive infrastructure changes would be required. But some parts of Europe were originally volts also. The top and bottom metal contacts are the ground.
Holburn produced volt direct current. The future would belong to AC. It was the Germans who introduced AC power in Europe.
The International Electro-Technical Exhibition in Germany would prove to be a key event in the development of electric power.
The exhibition featured a hydroelectric power station at Lauffen, with transmission lines that extended miles km north to Frankfurt am Main. The Lauffen-Frankfurt line was the first efficient long-distance transmission system. It transmitted volt 40Hz AC power. Russian-born Dolivo-Dobrovolsky [] immigrated to Germany to study electrical engineering in Darmstadt.
He later worked in Berlin and Lausanne, and did important work in electrical science and obtained over 60 patents. His grave is in Darmstadt. He also preferred volt power. Electric motors are also much less efficient at the lower frequency. Cost was the main reason Europe went with volts now Counterintuitively, higher voltages allow the use of thinner wire, meaning less copper in the early days of power lines. Power companies could save money on wire by using volts rather than Berlin is one example.
Gradually producers merged, governments set standards, and market pressure demanded that appliances could be used everywhere.
This lead to the current situation, where the pressure for a world standard is counterbalanced by the invested interests.
For the same amount of energy V requires more current, hence thicker wires. In some rare situations V might be more dangerous to touch. I don't think 50 or 60 Hz makes any significant difference. An iron core for a transformer might be a little smaller at 60 Hz. But iron cores are soooo last century It's hard to be definitive. There was a campaign by Edison to portray AC as dangerous, even going so far as to introduce an electric chair powered by AC electricity as an execution device, thereby demonstrating the "danger of AC".
Once AC was widely accepted as being superior to DC for power distribution, V became the standard for AC distribution presumably because it used the "safer" Voltage level of the DC system.
After metal filament lamps became feasible, V became common in Europe because of the lower distribution costs. As for 50Hz versus 60Hz.. The same reason we still pave roads that go around buildings that were knocked down half a century ago. Historically someone, or some group, picked a number in each country, others followed suit, and it became "a standard".
Now we are stuck with them. The V issue is simply that once Tesla and Westinghouse proved long distance AC transmission feasible, the 1 issue driving the proliferation of electrification was lighting in houses, replacing the gas and oil lighting that was a major fire hazard of the day.
Then as personal appliances began proliferating, they were designed to take advantage of the VAC lighting circuits already used in houses and the concept cemented itself into our culture to where there was no going back. Edison, despite having investing in AEG as Europe began electrifying, was reluctant to allow a system in which Europeans could enter our market by selling electrical products here. So after also experimenting with different frequencies 40Hz was the first major industrial installation, at the Folsom Power House in California , Edison and Steinmetz settled on 60Hz, partly because of the flicker issue, then also because it would make European equipment incompatible.
He wanted it all to himself He wanted DC because he owned the US patent rights to his DC dynamo even though he actually bought his first one, for proof of concept, from Werner von Siemens. Siemens had not patented it in the US.
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