its like a hybrid of the north american system and the german system to those that dont know, the 100/200 volts and 50/60hz came from generators used during war that were originally designed for the 125/250v north american system but run at lower power to save fuel, and the 60hz came from USA made westinghouse generators, while German made generators on the other side were built to output 50hz it was made standard after the war, as japan had no previous electrical system and 100/200v 50/60hz hardware had spread across japan already, making it the only nation with a completely unique electrical systems, 2 of them if you count the 50 and 60hz sides
Not why Japan uses 100/200V. Japan had no native electrical industry in the 1890s and so imported Siemens and AEG 220V 50cy/sec equipment for use in and around Tokyo and General Electric and Westinghouse 110V 60cy/sec equipment for use in and around Osaka. These respective potential and frequency standards spread out from those respective cities. The reason for the oddball 100/200V standard is that since a standard potential would screw over one of those installed bases, they decided to instead screw over both.
ok, so no way that running generators at lower voltage is going to save fuel. In fact lowering voltages is in some ways going to increase energy demand because lower voltages means proportionally more energy is lost to voltage drop, thus more energy is wasted. Motors will compensate for the lower voltage by drawing more current and shortening their life. Incandescent light bulbs will use less energy overall, but their efficiency plummets and they produce far less light relative to the energy consumed. The only way this marginally works is it does reduce the output of electric heating elements. However at the time this would have occurred electric heating would be extremely rare.
@@ryuukeisscifiproductions1818 it only saves fuel because loads dont run at full power it is less efficient and also results in higher current they did not look at watthours per liter, they looked at liters per hour but these grids were local and small making the voltage drop insignificant and not a factor to base electrical technicians, that was until electricity came to civillians where now it is a very inefficient and limiting system all arround, and a severe case of old habits dying hard common outlet circuits in japan are commonly only 10 amps, or 1000W, anything like an air conditioner uses a 200V circuit while using the same amount of copper as both higher current and higher voltage circuits in other countries, 20 amp 250v or 125v circuits in NA can carry 2.5-5kW with not much more copper, and support exponentially longer distances, and 16 amp 230V circuits in mainland europe benefitting similarly, 3.68kW over similar wire gauges
50A? When I sold my house in 2000 it was a 60A panel and it wasn't code. My house in AZ is 200A. In Italy, they are pretty low as well, like 30A, they need approval to go to 60A. Crazy. People post that they can't run the dishwasher and microwave at the same time.
My home in mexico is rated for 80Amps because of washer and dryer AC heat pump and I still think that's low. If I want anymore amos let say adding a dish washer The wiring would have to be replaced from 12 gauge to 10. I only have 10 gauge for the dryer and its 220volts.
Japan developed their electrical system somewhat independently focusing on simplicity and compactness. Their lower voltage reduces the risk of shock, so I guess they never felt the need to upgrade. According to ChatGPT RCDs/GFCIs are are not mandatory in Japan. You would think they would be given the higher risk.
Low voltage ≠ less of a damage from being shocked at 100v. Sometimes appliances also pick up static charges like fridge body. They need to dissipate that through ground.@@StuartJ
@@TheDeathLoveThey usually use ground for fridge, washing machine and microwave, and some 200V appliances like higher capacity Air Condtioner, EV charger, etc
its like a hybrid of the north american system and the german system
to those that dont know, the 100/200 volts and 50/60hz came from generators used during war that were originally designed for the 125/250v north american system but run at lower power to save fuel, and the 60hz came from USA made westinghouse generators, while German made generators on the other side were built to output 50hz
it was made standard after the war, as japan had no previous electrical system and 100/200v 50/60hz hardware had spread across japan already, making it the only nation with a completely unique electrical systems, 2 of them if you count the 50 and 60hz sides
Not why Japan uses 100/200V. Japan had no native electrical industry in the 1890s and so imported Siemens and AEG 220V 50cy/sec equipment for use in and around Tokyo and General Electric and Westinghouse 110V 60cy/sec equipment for use in and around Osaka. These respective potential and frequency standards spread out from those respective cities. The reason for the oddball 100/200V standard is that since a standard potential would screw over one of those installed bases, they decided to instead screw over both.
ok, so no way that running generators at lower voltage is going to save fuel. In fact lowering voltages is in some ways going to increase energy demand because lower voltages means proportionally more energy is lost to voltage drop, thus more energy is wasted. Motors will compensate for the lower voltage by drawing more current and shortening their life. Incandescent light bulbs will use less energy overall, but their efficiency plummets and they produce far less light relative to the energy consumed.
The only way this marginally works is it does reduce the output of electric heating elements. However at the time this would have occurred electric heating would be extremely rare.
@@ryuukeisscifiproductions1818 it only saves fuel because loads dont run at full power
it is less efficient and also results in higher current
they did not look at watthours per liter, they looked at liters per hour
but these grids were local and small making the voltage drop insignificant and not a factor to base electrical technicians, that was until electricity came to civillians where now it is a very inefficient and limiting system all arround, and a severe case of old habits dying hard
common outlet circuits in japan are commonly only 10 amps, or 1000W, anything like an air conditioner uses a 200V circuit
while using the same amount of copper as both higher current and higher voltage circuits in other countries, 20 amp 250v or 125v circuits in NA can carry 2.5-5kW with not much more copper, and support exponentially longer distances, and 16 amp 230V circuits in mainland europe benefitting similarly, 3.68kW over similar wire gauges
Cool video! Love learning from you, sir.
This is cool I love looking at different electrical systems from around the world
I read 50Hz on the main bloc. It's 50Hz all in Japan?
50A? When I sold my house in 2000 it was a 60A panel and it wasn't code. My house in AZ is 200A. In Italy, they are pretty low as well, like 30A, they need approval to go to 60A. Crazy. People post that they can't run the dishwasher and microwave at the same time.
My home in mexico is rated for 80Amps because of washer and dryer AC heat pump and I still think that's low. If I want anymore amos let say adding a dish washer The wiring would have to be replaced from 12 gauge to 10. I only have 10 gauge for the dryer and its 220volts.
In Indonesia here, average small house only supply with 220V 10A 😢 bigger house supply with 16-25A 😅
Interesting but why no ground?
Japan developed their electrical system somewhat independently focusing on simplicity and compactness. Their lower voltage reduces the risk of shock, so I guess they never felt the need to upgrade.
According to ChatGPT RCDs/GFCIs are are not mandatory in Japan. You would think they would be given the higher risk.
@@StuartJ
Do tell.
Low voltage ≠ less of a damage from being shocked at 100v. Sometimes appliances also pick up static charges like fridge body. They need to dissipate that through ground.@@StuartJ
@@TheDeathLoveThey usually use ground for fridge, washing machine and microwave, and some 200V appliances like higher capacity Air Condtioner, EV charger, etc
Why 2 phases and not 3? In Europe, 1 or 3.
It's split phase similar to North America. I have a video about it.
Here is the link. th-cam.com/video/Xj-_zEDwxjE/w-d-xo.html
Its not 2 phase. Its split phase, ie its the same phase with 2 ends of the secondary coil with middle one as neutral.
@@wilsonsamuel2469 I understand, but then why is the cross-section of the neutral conductor the same?