4 wire for main panel?

[mnahrgang]

What would you say about this. The meter is directly opposite this panel on the exterior (typical 100AMP box w/no breakers). The cable coming into the panel is 4 wire but only three are being used to power the home. The extra wire is simply laying in the bottom of the panel. (It's hard to see, but the gray wire that leaves the pic to the left, loops back into the pic at the bottom, and is tucked next to the edge. You can barely see the end of it in front of the knockout close to the entrance.)

Any concern?

[Jeffrey R. Pope]

Is it connected to anything at the other end? If not, I wouldn't be concerned about it.

[mnahrgang]

Originally Posted by jpope

Is it connected to anything at the other end? If not, I wouldn't be concerned about it.

I don't know. I would assume the other end is in the meter box. I didn't remove the meter to look at what was there, and I didn't touch it to see if it were live. I guess i could have stuck my ticker on it, but I've got a pretty firm standard policy of not breaking the invisible line of the panel cover. I didn't even consider it at the time.