Captive cables only need enough copper to supply enough current for the device they're built into.
Separate cables, OTOH, need enough copper for 500mA with a certain voltage drop to be USB standard compliant. Means 24AWG or bigger for a 2m cable [1].
That's why your keyboard, mouse and webcam have skinny cables while other USB cables are much thicker.
Separate cables, OTOH, need enough copper for 500mA with a certain voltage drop to be USB standard compliant. Means 24AWG or bigger for a 2m cable [1].
That's why your keyboard, mouse and webcam have skinny cables while other USB cables are much thicker.
[1] http://cdn2.goughlui.com/wp-content/uploads/2014/10/USB-Cabl...