A system for sensing current in one or more first electrical conductors includes a frame and a retainer configured to receive the one or more first electrical conductors and constrain relative movement between the one or more first electrical conductors and the frame. The system may also include a first magnetoresistive sensor configured to sense magnetic flux and generate an output signal relating to the sensed magnetic flux. Additionally, the system may include an adjustable positioning system configured to enable supporting the first magnetoresistive sensor from the frame in any of a plurality of possible positions with respect to the retainer.