How Long Is Too Long For A USB Cable?

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One of the best things about USB is that you rarely need to think about it. Sure, there are some differences between USB generations, but no matter what, if you plug a USB cable into a compatible device, it will work without issues, as long as the cable isn't too long, that is. Of course, you're unlikely to need an extremely lengthy USB cable — unlike, say, HDMI cables — but if you ever do, there are limits to USB cable length that you should be aware of.

The USB Implementers Forum (USB-IF), which defines USB standards, has outlined maximum lengths for different types of USB cables. These range from about 16 feet to as low as 3 feet. The Forum is an industry group, not a regulatory body, so there's nothing stopping manufacturers from making longer cables. The limits are a guide to best practices, as exceeding the USB-IF's...

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