Grounding

If my bonding/grounding system’s resistance to ground needs to be <10/25 ohms, then why is ESD footwear allowed a resistance of 1,000,000 ohms?

This is another Top 10 question on flammable liquids safety I get from clients, cold calls, referrals, and friends. Most are familiar with the testing limits for path to ground on bonding/grounding stations of 10/25 ohms. In my previous post tonight I explained where these 10 and 25 ohm limits came from and how they…...

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If 1 meg-ohm is adequate resistance to ground, then why do we test to 10 or 25 ohms?

Theoretically, a resistance to ground of 1,000,000 ohms is considered capable of dissipating a static electrical charge. So why then does my safety program (and NFPA 77) require a resistance to ground of 10 or 25 ohms OR LESS, depending on the metal used in my system? (e.g. end-to-end resistance of a bonding wire should…...

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