operate when a fault occurs.
That’s why modern grounded receptacles have three openings:
- A hot slot
- A neutral slot
- A grounding opening
The hot and
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neutral slots are different sizes on a polarized receptacle, helping ensure that a polarized plug is inserted in the intended orientation.
The third opening provides the grounding connection for compatible plugs.
So when you see that little U-shaped opening, you’re looking at an important safety feature.
Why Would Someone Put
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