2007-09-13 14:18:12 · 7 answers · asked by Mark 1 in Home & Garden ➔ Maintenance & Repairs
The holes are for the ground prong.
Three wire cords are grounded.
Two wire cords are polarized (one blade bigger than the other)
2007-09-13 14:24:32 · answer #1 · answered by CARL B 4 · 0⤊ 4⤋
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2016-11-15 04:27:51 · answer #2 · answered by ? 4 · 0⤊ 0⤋
I"ve been looking at those things for years and never thought to ask myself the question. Nice one! But cylindrical pins have grooves or slits, and I can't see them fitting into anything. Some sort of heat-dispersing purpose perhaps?
2007-09-13 14:33:28 · answer #3 · answered by picador 7 · 0⤊ 0⤋
I believe there is an inverted dimple that fits the hole in the plugs blade, just to hold the plug inplace. "engineer retired " I believe has it right I never took a receptacle apart.
2007-09-13 16:10:44 · answer #4 · answered by petethen2 4 · 0⤊ 1⤋
The holes usually slip into small bumps inside the recepticle to help hold the plug in place.
2007-09-13 14:27:09 · answer #5 · answered by engineer_retired 3 · 5⤊ 1⤋
Not all do. It's an artifact of some
manufacturing processes.
2007-09-13 14:23:26 · answer #6 · answered by Irv S 7 · 1⤊ 0⤋
nah, it's part of the process used to create them.
2007-09-13 17:31:15 · answer #7 · answered by Anonymous · 0⤊ 0⤋