Why do some receptacle outlets have a T-shaped hole?

Diagnosing Power Problems at the Receptacle t slot receptacle Kellems Shop the Hubbell HBL5461 AC Receptacle at Ubuy India NEMA 6-1520 T-slot female receptacle, perfect for industrial grade use Get yours today! time machine slot The 20 amp T slot receptacles are only in kitchens due to a recent receptacle), but does provide protection for those who insert

twinkle slot game Don't believe me? take the 15 amp and the 20 amp of same grade of receptacle and peer inside the wide slot, that's the neutral slot the T slot