Hi, I really wasn't sure where else to post this so apologies if this isn't the usual kinda thing you get here. I've a Panasonic bathroom fan which I need to wire to a regular extension cord, only it has 2 ground wires, one of which is in a position unfamiliar to me on the junction box. Leading rom the capacitor are your 3 regular white, black and green wires, but screwed to the side of the metal junction box is a second ground (green) wire. This isn't attached to anything at the other end. I know what to do with the other 3, I'm just lost as to what I'm mean't to do with this second ground wire. Do I just attach it to the other ground wire and then attach them both, to the ground on the extension cord?
Here's a link to a pic of the junction box, mentioned above -