A flexible circuit current measuring apparatus, comprising: a first flexible substrate member having a top side and a bottom side; a second flexible substrate member (38, 44) disposed on the top side of the first flexible substrate member and having a top side and a bottom side; a third flexible substrate member (42, 54) disposed on the bottom side of the first flexible substrate member and having a top side and a bottom side; a plurality of first conductive traces disposed directly on the top side of the second flexible substrate member (38, 44) and spaced along a length of the second flexible substrate member (38, 44); and a plurality of second conductive traces disposed between the first flexible substrate member and the third flexible substrate member (42, 54) and spaced along the length of the first flexible substrate member, wherein the first conductive traces and the second conducive traces are electrically connected to one another to form a serpentine pattern having a number of windings about and along the first and second (38, 44) flexible substrate members; and a plurality of third conductive traces and a plurality of fourth conductive traces, wherein the fourth conductive traces are disposed directly on the bottom side of the third flexible substrate member (42, 54) and the third conductive traces are disposed between the first flexible substrate member and the second flexible substrate member (38, 44) wherein the third conductive traces and the fourth conducive traces are electrically connected to one another to form a second serpentine pattern having a number of windings about and along the first and third (42, 54) flexible substrate members, and wherein the current measuring apparatus is structured to be wrapped around a conductor for measuring a current carried by the conductor. a first flexible substrate member having a top side and a bottom side; a second flexible substrate member (38, 44) disposed on the top side of the first flexible substrate member and having a top side and a bottom side; a third flexible substrate member (42, 54) disposed on the bottom side of the first flexible substrate member and having a top side and a bottom side; a plurality of first conductive traces disposed directly on the top side of the second flexible substrate member (38, 44) and spaced along a length of the second flexible substrate member (38, 44); and a plurality of second conductive traces disposed between the first flexible substrate member and the third flexible substrate member (42, 54) and spaced along the length of the first flexible substrate member, wherein the first conductive traces and the second conducive traces are electrically connected to one another to form a serpentine pattern having a number of windings about and along the first and second (38, 44) flexible substrate members; and a plurality of third conductive traces and a plurality of fourth conductive traces, wherein the fourth conductive traces are disposed directly on the bottom side of the third flexible substrate member (42, 54) and the third conductive traces are disposed between the first flexible substrate member and the second flexible substrate member (38, 44) wherein the third conductive traces and the fourth conducive traces are electrically connected to one another to form a second serpentine pattern having a number of windings about and along the first and third (42, 54) flexible substrate members, and wherein the current measuring apparatus is structured to be wrapped around a conductor for measuring a current carried by the conductor.