Sorry guys, I'm not expert in these things. I thought that ground connections were standard in electrical equipment, are they not the "neutral" wires in the plugs? AS for ensuring they are all grounded to the same socket, well, they are! If anything I'm in danger of overloading things, I have a fx processor, a 4 track and a keyboard all in one socket. Sometimes they are joined by another fx processor, and an amp! Aside from the amp I dont' think they draw much current. Is this dangerous?