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In this video I’m going to show you how to ground solar panels the right way, and why it matters more than most people think. A lot of people hear the word “grounding” and immediately think lightning. Lightning is part of the bigger picture, but the most common safety issue is much simpler: if a fault happens and the metal frames or racking become energized, you can get shocked while working on a roof and that shock can make you lose your balance and fall.
I’ll walk you through the difference between bonding and grounding/earthing, because those two terms get mixed up all the time, even by me. Then I’ll show you what actually needs to be bonded on a typical solar array so all the metal stays at the same potential. We’ll also talk about why “floating” metal can sometimes show stray or induced voltage when you measure it, and why that’s still something you want to take seriously on a roof. After that, I’ll explain whether you need a separate ground rod near the panels (and why a “separate earth” can cause problems if it isn’t bonded back properly). Finally, I’ll cover the basics of grounding wire size for Europe versus the U.S., what a standard ground rod looks like in the U.S., when you add a second rod, and the typical spacing.
Quick safety note: electrical rules vary by country and even by state, so always follow your local code and the instructions from your racking and equipment manufacturers.
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