Friday/ charging, with 240 V

Here’s the 240-volt adapter for charging my Tesla’s car battery. (I had to buy it separately; it does not come with the car. Now all I need is the actual car with its battery, right?).

I will need a new electrical outlet, connected to a 240 V circuit, in my garage, similar to the one that I have in my basement for the clothes dryer. The standard 120 V outlet will actually do the job, charging the car. It will just charge a lot slower, up to 8 miles (of battery range) per hour vs. about 30 miles per hour for the 240 V outlet.

Think of electricity current (electrons) as water in a pipe, and voltage as the pressure that is applied to push the water through the pipeline. High voltage pushes more electric charge per second through the charging cable, and gets the battery charged quicker.

Just for fun, here’s a table with examples of electricity flow, current and voltage.
One ampere of current is one coulomb of charge moving past a given point per second. One coulomb is exactly 1/(1.602176634×10−19) elementary* charges.

*the charge on an electron

Electricity FlowCurrentVoltage
Current across human cell membranea few µA70 mV
iPhone consuming battery power0.1- 0.5 A3.7 V
LED light bulb (12W)0.1 A120 V
Incandescent light bulb (60W) 0.5 A120 V
Electric eel, delivering a shock1 A600 V
Household clothes dryer11 A240 V
Tesla car battery, charging12- 48 A 240 V
Long-distance power transmission line700 A350 kV
Lightning bolt (run for cover)30 kA300 MV

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