Quote:
Originally Posted by jrref
In your particular case, you are basically right in your assumptions but I would still consult with a lightning protection professional like A1 to see what's proper for your metal home. Typically, they put aluminum rods in a much less complex arrangement and a lot cheaper, so if lightning strikes it hits the rods and the charge is sent safely to ground instead of a random part of your metal structure. In your case without the rods, any part of your metal home could be the end point of a strike, and potentially damage the metal structure of your home since it's not designed to withstand that kind of event. Even though your home is grounded, there is no guarantee that every part of your metal home is making good electrical contact to send the charge safely to ground. If you look closely, most homes and businesses with metal roofs have aluminum rods that are grounded. A LPS system in your case may be cheaper than you think.
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Most homes and businesses are not manufactured homes set on cinderblocks and anchored to cement posts several feet deep into the ground, with metal roofs and metal frames.