carrying current in another example the bus bar 50 the shield 46 or both could be an alloy or a multilayer material including a layer of aluminum for example covered by a layer of another material in a multilayer example multiple sheets of various materials could be connected or bonded the multilayer example of the bus bar 50 may include a copper sheet and sheets of other alloys or metals and aluminum the copper sheet could be a plating of copper on another material referring now to fig4 an example shield 46 a is a folded portion of a bus bar 50 a formed from a planar sheet of material that has been is folded over itself since the shield 46 a is essentially the bus bar 50 a folded a single time a thickness 2t of the shield 46 a is about twice a thickness t of the bus bar 50 a other shields may be folded more than once one of many types of manufacturing processes may be used to fold the bus bar 50 a to form the shield 46 a to protect the current sensor 42 referring now to fig5 with continued reference to fig4 another example shield 46 b includes a flange 60 extending directly from a primary portion 58 b of the bus bar 50 b a second flange 64 extends.