Why the US and Japan did not switch to 220V | GwakGwak2 ep.2
- What to look for
- Understand the difference between generating electricity and delivering it reliably through frequency balancing, simulated faults and household voltage.
- Why it matters
- Separate reduced conductor losses from appliance consumption, and examine the assumptions needed to compare the benefits of voltage conversion with replacement costs.
Timeline
7 segmentsFor the same transferred power, higher voltage can reduce current, but insulation, equipment compatibility and replacement costs also matter. The creator’s correction and electricity guidance distinguish standard 120V outlets and 240V major appliances in the United States, and basic 100V supply with some 200V appliances in Japan. The title concerns changing the default household outlet voltage, rather than claiming that these countries never use higher voltage.
An independent exercise, not a statement by the video creator or verification of every claim in the video.
Which power consumption actually falls when voltage rises?
For this hypothetical calculation, hold power delivered to a unity-power-factor load at 1,100W and assume total conductor resistance of 0.1Ω. At a load voltage of 110V, current is 1,100÷110=10A and conductor heating loss is 10²×0.1=10W. Delivering the same load power at 220V gives 5A and a loss of 5²×0.1=2.5W. The loss falls by 75%, but the load’s 1,100W consumption does not fall by 75%. Supply power in this simple model drops from 1,110W to 1,102.5W, a reduction of 7.5W or about 0.68%. Conversely, applying 2 times the voltage to the same resistance gives 4 times the power through P=V²/R, violating the fixed-power assumption. Conversion economics therefore require comparing loss savings with equipment, insulation and compatibility costs.
Check for yourself
- Does the comparison hold load power or appliance resistance constant?
- Is the saving measured against conductor losses, supply power or the entire electricity bill?
- Have equipment ratings, insulation and replacement costs been included?
Limits of application
These are illustrative assumptions, not measured household savings or national conversion results. Reactive power, voltage drop, transformer and conversion losses, changing loads and tariff structures are simplified. This is not an instruction to change supply voltage or modify wiring; equipment ratings and manufacturer guidance must be followed.