Lead
There is a noticeable difference between the voltage in the United States and China, where the voltage is 110 volts and on the mainland it is 220 volts.
So can the voltages of both countries be used compatible?
And why does the U.S. set the voltage at 110V?
body
When the United States builds a power system, the transmission of electricity will face resistance loss, which leads to the higher the voltage, the smaller the resistance loss.
Therefore, when the power system was established at that time, it was necessary to make the voltage as large as possible, so that the power lost in the transmission process would be relatively small.
Although the higher the voltage, the smaller the loss, but too much voltage can be very dangerous.
The United States had no experience in building a power system at that time, and the poles on the street were not necessarily vertical, and many of them would be a little crooked, so the United States set the voltage at 110V at that time, which could ensure safety and not lose too much.
So why didn't the U.S. set the voltage at almost 220V?
According to the national conditions of the United States, the buildings in the United States are mainly made of wood, so when building the power system, it is mainly used to transmit electricity to the home with wires and cables.
The biggest reason why the U.S. set the voltage at 110V at that time was to ensure safety.
Although the equipment is imported from developed countries, their safety standards are still formulated according to local conditions.
In the United States, when the voltage was set, it was mainly based on the risk of electric shock of the voltage, rather than considering the amount of electricity consumed.
Therefore, the maximum voltage is set at 110V to prevent the risk of electric shock.
The voltage difference between the United States and China is large, at 110V and 220V respectively.
Can the voltage in the United States be used in the mainland?
The voltage in the United States is half that of the mainland, so the voltage in the United States must be able to be used in China.
When the 110V voltage in the United States is used in China, the bulb with resistors at both ends will be brighter.
When the United States uses 220V voltage, the compatibility is relatively not so strong.
Since the US is 110V and it is a half-phase voltage, if you use a 220V plug directly, it will cause the equipment to burn out.
Therefore, only one side of the voltage of the two countries is more compatible, and it is more dangerous to use the voltage of the other side.
Therefore, when domestic household appliances in the United States are exported to foreign countries, the resistance in the electrical appliances will be adjusted appropriately when adapting, and the electrical appliances will be adjusted to foreign voltages.
When there was no electricity in China, the voltage in the mainland was 110V, which was half of the voltage standard in the United States at that time, and then when the mainland was electrified, the voltage was adjusted to 220V, which was not only the adaptation of electrical appliances to the family, but also in order to burn out all the 110V electrical appliances in the mainland at that time when the mainland was electrified on a large scale.
The United States had no experience in building a power system, so it set the voltage at 110V, which could ensure safety and loss, but did not expect to face compatibility problems.
Therefore, in order to prevent compatibility problems in the later stage, the United States successively designed the holes of the plug to be larger, so as to bring convenience to the equipment to upgrade the voltage just in case.
But I didn't expect that no country uses 110V voltage, and the United States has no follow-up equipment to upgrade on the basis of 110V, and the equipment for changing the voltage has long been done, but no one has changed it, because the current equipment can still be used at 110V voltage.
And once the voltage is replaced in the United States, not only the wires and cables must be completely replaced, but all household appliances need to be replaced, which is undoubtedly a huge expense, and the United States, as an economic power, has not made up its mind to change the voltage in this regard.
The construction in the United States is mainly made of wood, and if the voltage in the United States is changed, the old buildings will become unsafe, and the wiring and wiring will have to be replaced, which is undoubtedly a huge project.
Therefore, the United States can only silently use the current 110V voltage for a lifetime.
Once the United States wants to upgrade the voltage, after the voltage is raised, the safety of the old building will also happen in the future, so there will be many safety problems, so the United States has to give up the plan to change the voltage.
epilogue
Although the United States set the voltage at 110V, this did not hinder the development of the United States, and the United States has become a world power today by relying on its own efforts.
Although the United States cannot solve the problem of compatibility for the time being, the United States also believes that human science and technology will certainly be able to solve the problem of compatibility in the near future.