Why Are There Holes In The Prongs? Explained

#ElectricalEngineering #HowThingsWork #LockoutTagout Two holes. Two tiny circles punched into every electrical plug you own. Your phone charger has them. Your microwave has them. The lamp you bought last week has them. Twelve billion plugs in American homes — and almost none of them need those holes to work. They're not required by code. They're not required by the manufacturer. Topics: 🎰 How a janitor struggling in a penny arcade inspired Harvey Hubbell to invent the detachable electrical plug 💡 Why Americans had to unscrew their light bulbs and screw in toasters to make breakfast in the early 1900s 🔒 How a tiny padlock through a prong hole prevents 120 workplace deaths every year 📐 The NEMA standard that confirms the holes are officially optional and have no electrical function Also check out:    • The Real Reason Tech Companies Removed the...   #techexplained