• NarrativeBear@lemmy.world
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      1 year ago

      Not exactly sure, I think it’s just one of those things were we “people” have gotten so used to the design and how it’s supposed to look, that even if it’s not needed we keep doing it.

      Since multiple companies manufacturer plugs and connections, some manufacturers may not need the holes as a part of the assembly process. Other may opt not to add them as they do not have a purpose (other then how we perceive a north america plug is supposed to look like).

      Funny story, almost all standard north america three prong plug are installed upside down. The third “center prong” or “ground” is actually on the top per the original design.

      Most new builds and electricians are opting to install this way now. The orientation has no impact on performance.