CAT5 used that way, cannot meet code anywhere except maybe in China!
Then again, know what bicyclists call that line on your seat post that denotes the maximum extension of the tube? The lawyer line.
Good news is that he only plugs it in at gigs. And his families lifestyle is just a half notch above Amish. :-)
Oh, and the band includes his family and me...
The amount of money save over using #14 AWG is what $20?
Is that the value he places on himself, you, his family and all the people in the audience.
It is a dumb risk for too little reward. Why do it?
If you are his friend, go down to Home Depot or some other store and buy the wire that is suitable for this purpose.