In all American-Canadian electric power systems, and probably the rest of the world also, there is a color code for the 3 man wires (and these wires are also often called “leads”). ?The?black?wire is where the main electricity flows, and it's usually called the “hot wire. ?Then there is a “neutral” wire which is wire that used to be the “ground" wire in the 2-lead system. ?The 2nd wire is supposed to be?white. ?But when a better third “grounding” wire was added to make the "3-lead” system, that “grounding” wire is always?supposed?to be green. ?Modern-day professional electricians always adhere to this 3-color code when installing new electrical systems, but older electrical systems (and newer systems installed by non-professionals who aren't properly trained) are sometimes sloppy about adhering to this color code. ?And sometime amateurs use wires that are not even the right colors to begin with.

Most power issues where you get a shock in A.C. power is caused by the two main wires (the black and white wires) being reversed from what they should be. ?In the days when there wasn't a third wire, just reversing the plug in the wall solved the problems. ?The third wire was added to stop the problem from happening in the first place. ?But even when plugs with this third wire are being used, some older?“2-lead" wiring still exists somewhere in the power supply system. ?Finding where the two main wires are reversed from what they should be will solve the problem.

Sometimes you can run a wire from under the “head” of any external screw that holds the instrument together to a similar screw on another instrument or other metal device associated wi the power supply and sometimes the shock will stop. ?You have to experiment around and try out various different connections to test things to see if they work as a temporary “stop-gap” measure at solving the problem. ?(This technique can also work for audible "buzzes" and “hums” in analog audio cables also, even electric guitars, and microphone stands and holders .)

Catch ya later. ?Bye for now.