> This is a huge usability issue for people with weak eyesight What is it about weak eye sight that prevents someone from turning their plugs over when they fi

> This is a huge usability issue for people with weak eyesight What is it about weak eye sight that prevents someone from turning their plugs over when they find it doesn't fit the first time? Are people with weak eyesight also all THAT short of time as well? Far easier with polarized NEMA plugs than, say, USB-A. > I never understood why US uses a wider pin on two prong plugs Because single-pole switches are cheaper, and ensuring the outer contact on an Edison light bulb screw fixture is neutral and NOT energized is an important safety feature.