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Why do electrical plugs have holes in the prongs?

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asked Aug 4, 2017 in Do it yourself by Southerngirl (260 points)
Why do electrical plugs have holes in the 2 prongs of the plug?

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answered Aug 5, 2017 by chad (14,670 points)
The reason for the holes is to allow the prongs on the plug to grip the inside of the electrical plug to prevent it from being pulled out so easily.

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