jk700 · HackerTrans

6 jaar geledendiscuss

Right, it's even more complicated. Such breakers also don't trigger at specified current exactly. They have two breakers inside of them, one for overload protection triggering once it heats up, could be an hour for 2x current if starts cold, and one for short circuit protection triggering in less than a second, but on 3x+, 5x+ currents, etc. So a 15A breaker, a 15A outlet and a cable for 15A all could easily see 30A of current for some periods of time and heat up.

jk700

6 jaar geledendiscuss

No, $10 for a cable with significant amount of power is unreasonable. If you ever dealt with some power cables, you'd know that 1 meter of the highest quality copper power cable for continuous delivery of say 15 amps (3 x 1.5 mm^2) shouldn't cost more than $0.6. And that's enough for 300 watts of power given 20 volts. But you probably will never see that much copper in a USB-C cable, at best you'll see third of that and with a flimsy insulation, which costs two orders of magnitude less than $10.

jk700

6 jaar geledendiscuss

It's not magic when step down DC-DC converters take as much space as power negotiation crap and all that's really needed is single 20 volts. Look at new ATX standardization development with proposals to leave only 12 volts, dropping 5 and 3.3 - that's the right way to standardize on power delivery. What USB-C is doing is not standardization, but an attempt to undermine standardization to profit from selling expensive cables and locking people into brands, just as device manufacturers did with non standard ports for mobile phones in the past and were eventually fined for it and forced to use standardized USB power delivery.

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