Another user has stated this in his answer and I was curious what everyone though? I do not believe that any wire insulator will block magnetic fileds, its just distance dependent right? (apart fom counteracting it with other magnetic fileds perhaps)
Sure, you can block it? What did you mean by blocking other than a shield? By insulation, you didn't mean like highly resistive, right? Cause that definitely won't do that trick. You need something metallic. A superconductor will pretty much kill the entire B-field in no distance at all.
