Fermi estimation flubs… guessed the amperage of a car starter motor wildly wrong this morning
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In my defense I was being more lazy than stupid… upon learning that USB-C can do 12V and fairly high current, I wondered if it could jump start a car (answer, no… off by 2 orders of magnitude… 5A vs ~200A)
But embarrassing even as a lazy guess
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I have bad intuitions for rated current vs conductor dia, but not this bad. Here’s a handy chart. ~200-300A calls for a conductor about 0.4” — about a finger width.
What’s “chassis wiring” btw?? Why is it max chassis amps so much higher than transmission amps at smaller sizes
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