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What's the purpose of the third hole in a 3-prong socket?

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Correct Incorrect It's the ground wire for safety, discharging electricity during faults to prevent shocks. Not a spare or special port.

What's the purpose of the third hole in a 3-prong socket?

• A spare hole with no function
• The ground connection
• A hole to connect specialized low - voltage devices
• A port to boost voltage capacity