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xkcd #3211: Amperage
(imgs.xkcd.com)
Title text:
Oh, and do you have any tips on how to vacuum up copper that's melted into your carpet?
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3211/
Eh, ~zero impedance house circuits won't do anything bad to normal electronics - it'll just make sure no fires happen in your walls. I do almost all home wiring in 12 gauge and larger for this reason
Actually, the comic only has 500A breakers and don't say anything about wires. Recipe for fire!
I think that's the joke, especially since the alt text asks about getting melted copper off the carpet.
The comic is talking about the cords that come out of the outlet into the room melting and starting fires. The guy you responded to is talking about wires in the walls starting fires.
Ah, the good old asbestos carpets. Cozy!
Yeah, I'm just imagining someone running multiple 0000 gauge (4 ought) cables in parallel to each outlet and switch, and then all back to the breaker box.
500 amps? That's no wiring, that's cabling.
Dude, the entire comic is about wires.