California Code, Penal Code - PEN § 487j

Every person who steals, takes, or carries away copper materials of another, including, but not limited to, copper wire, copper cable, copper tubing, and copper piping, which are of a value exceeding nine hundred fifty dollars ($950) is guilty of grand theft.  Grand theft of copper shall be punishable by a fine not exceeding two thousand five hundred dollars ($2,500), by imprisonment in a county jail not exceeding one year, or by both that fine and imprisonment, or by imprisonment pursuant to subdivision (h) of Section 1170 and a fine not exceeding ten thousand dollars ($10,000).