You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com.

 Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

<p>You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com.</p><p> </p> Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>

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You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com.

Why do electric plugs have holes?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/b049c242-84f4-4d59-84a8-ae32008aa49d/transcript