Safety: Unsafe Assumptions, Part 9

Don't make assumptions about grounding; it doesn't necessarily make you safe.

Assumptions about grounding can put you six feet underground. Here are some additional ones to avoid.

  • “Grounding makes me safe.” Article 100 of the NEC defines grounding as connecting to the earth, which is a high-resistance path. Its impedance may be 1,000 greater than the resistance of your body. If you apply Kirchoff’s Law of parallel circuits, you’ll see that ground connections won’t shunt enough current to protect you.
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