Because they know that some countries use V while others prefer V, they have designed products with mechanisms that you can use to switch the setting from V to V and vice versa. But if you do not have a dual-voltage appliance, you can use transformers and adapters to convert your V appliance so that it works on a V power supply. To convert a V appliance, you have to connect it to a transformer. You have to plug the AC transformer into the V outlet.
Once this is done, it becomes a simple matter of plugging the V appliance into the outlet of the transformer. But you have to match the rating of the appliance to the rating of the transformer.
The wattage of the transformer has to be the same or higher than the wattage of the appliance. People think that the process involves changing the wiring of the appliance or adding an internal transformer. But that is not true. You cannot change the internal mechanisms of a V appliance to make it compatible with V power supplies. For instance, Japanese plugs have flat blades. Therefore, you cannot push them into Italian outlets because they have round pins.
This difference in plugs and outlets is helpful because, in many cases, V appliances that are designed for use in countries with V power supplies have plugs that might not fit the outlets in countries with V power supplies.
In other words, the difference will keep you from accidentally plugging a V appliance into a V power supply. Unfortunately, this can become a problem in situations where the plug of your transformer has a different configuration from the V outlet you want to use.
An adapter will solve this problem. You can also use it in scenarios where the plug of the appliance cannot fit the outlet of the transformer. That includes buying adapters that have overload protection and ground protection. These features will keep you safe from various hazards. I also you to ensure that the rating of the adapter is larger than the wattage of the appliances you want to operate.
Like other sensitive electric devices, you should keep the adapter away from water. You are equally discouraged from disassembling these devices. If they develop a fault, call a professional. Otherwise, there is no reason to plug a V appliance into V unless you have to carry out a test or experiment. Physically, you can plug V into a V socket. Homes in the United States are wired for both v and v use.
Regular power outlets found throughout a home are wired to v while only a few outlets are wired to v. They both are grounded; thus, they have safety features built into them. However, you should still use caution especially when you wire v. While most consumer goods, including portable electronics and most appliances, run on v power, some require v.
Appliances, such as dryers, certain oven ranges, heavy-duty power tools, and compressors explicitly require v power.
A typical v wiring schematic requires three different wires: hot, neutral, and ground. With v wiring, both three and four-wire setups are possible. The red and black wires in v setups each carry v, and the green wire is the ground.
With four-wire setups, there is a white wire which is called the neutral or common wire. When the wiring is complete, the respective outlets for v and v power are different as well. Standard v outlets are made for three-pronged plugs, the middle of which is the ground. Search Search. Toggle navigation. Select Material Copper Aluminum. Enter 1-way circuit length in feet.
Enter Load in amperes. Voltage drop. Gradually, the minority choices died out, and today we are mostly left with just the 'big two'. Why did Thomas Edison plump for v? Who knows, but more than probably had a nice ring to it, appealing to both his showmanship and his fledgling market. You can probably find quite a bit of history details if you search.
There is no physical reason for any of standard voltages used around the world. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why V and V? Ask Question. Asked 5 years, 11 months ago.
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