Even thin conductive barriers can usually block the energy.

@empdoctor is that thin thing the ferrite you referred to in this video? Thank you

With a ballast (which just controls the levels of voltage and current typically to lights), you can use a broadband ferrite around the wire bundle. See disasterpreparer.com/product/emp-ferrites/. Just pick one that is large enough to go around the wire bundle.

Actually, a 2-way radio is both good and bad to test a Faraday cage. The good news is that the frequency is in the right range. However, if you just use a set out of the box, it's way too powerful to block. It requires about 120 dB to block a good set of radios. I designed a Faraday cage tester that uses 2-way radios as the source and receiver, but it requires additional hardware. Check out kzfaq.info/get/bejne/bs5ddsmBst-6gYE.html.

While having a connection to the grid certainly causes greater risk, even disconnected items could be damaged. Anything with modern solid-state circuitry is susceptible to damage from an EMP.

The products are designed to suppress transients from any source, EMPs, solar CMEs, etc.

I did an analysis of a Medtronic pacemaker a couple of years ago, and it look like it would survive an EMP without damage. That was one particular unit, but it's promising.

@@disasterprepper thank you for your response, it actually makes me hopeful.

It's not solar flares that are necessarily low frequency. It is coronal mass ejections. Those are the solar events most likely to cause a large geomagnetic disturbance at the Earth's surface. Flares can cause their own issues, including hazards to those at high altitudes and radio interference.

We tested about six of them a couple of years ago. Several did fairly well, offering anywhere from 20-40 of shielding, but some are very expensive to use for large projects.

@@disasterprepper Ah interesting. It was on my mind because Lowes was clearancing their magnetic primer (stuff you paint on to make a surface that magnets would stick to). When I picked up a quart can of the stuff I realized it weighed around 2-3 times what normal paint does so I thought "man this has a lot of iron in it". Did you by any chance test this kind of paint or any of the "aluminized" paints like Rustoleum or anything else that a person could just pick conveniently in their local hardware store? I queried your channel for paint and didn't see anything but if you have a video on it I'd like to check it out. Thanks.

@@NickFrom1228 The ones we tested were all specialty paints, not offered at Lowes or places like that. One brand I remember doing well is YShield HSF54 and MAX54.

@@disasterprepper Much appreciated. I'll see what I can find. Thanks.

It really depends on what you're interested in ordering. Usually, it's not terribly expensive to ship a small box of components, perhaps $30-$50 depending on the number of items.

@@disasterprepper Most likely ferrite beads and some gaskets for shielding boxes. Unfortunately, radios can't be imported w/o a ham license so I'll have to pass on your dB tester. Thanks for the reply !

@@Dreadlockyx Fair enough. Let me know if you end up needing anything.

Do you mean a copper barrier? If so, I can tell you that it's very effective. Actually, and good conductor is effective... aluminum, silver, copper, etc.

@@disasterprepper what i mean is like what you do with the aluminium foil, I have started to make a aluminium and copper faraday cage and i am wondering if the copper is good enough to protect my most valuable things

by the way thank you for replying so fast it means a lot

@@adamgibbons8135 You can use any conductive material (copper or aluminum foil) to wrap a box. As long as you fully cover it, the box will give at least 50 dB of shielding (99.7%). That's enough for something inside to survive an EMP.

We haven't set an end date, but it's probably for 1-2 weeks.

@@disasterprepper Thanks, hoping you go till the end of the month.