Would EMPs be similar to lightning strikes if so, when using lightning rods like other generations before your parent's day, these push energy away from the place that needs to be protected? A rod is made up of a steel or iron rod with wires going off it to the ground which is grounding the energy spikes from any serge outside the residence. You could surround objects to test this, in testing don't use your best objects in the test of electric machines to saved or massacred. If it works then all that copper isn't needed.