Can someone explain clearly what is ground loop and when we should worry about it?
Shall I worry about it when I connect two USB wires in parallel to deliver power to my 3G modem?
I have something like this:
I was asking about this earlier, here is my question:
I did it, it works, but in comments under another discussion (here) one guy (ppumkin) pointed, that this will be ground loop. I know what ground loop is, I know how that can ruin audio quality in hi-fi system, but... can ground loop like this affect 3G modem or WiFi sensitivity or cause other issues?
I have ground loop with 2 USB wires 1m (~3ft) length, wires are very close...