Regarding power surges into electrical systems, there are excellent solid state surge arrestor s which can be connected to the service entrance conductors of a building and to ground. The arrestor is made using a semi conductor which normally isolates the conductors from ground, but in the presence of a voltage spike (which could be caused by an EMP or CME) semiconductor is instantly ionized and conducts the voltage surge to ground. I sold and installed these devices to home and business owners who had previously had damage to electronics and well pumps due to voltage spikes caused by lightning strikes. I never had a customer experience any damage after installing a solid state surge arrestor on the service entrance conductors. A whole house solid state surge arrestor would be a very wise prep for those who have suffered lightning damage to electrical and electronic equipment due to lightning, or as a means of protection against EMP and CME induced voltage surges.
Statistics: Posted by tidewaterva — Tue Apr 11, 2017 9:17 pm