xkcd #3186: Truly Universal Outlet
Title text:
Building Inspectors HATE This One Weird Trick
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3186/
xkcd #3186: Truly Universal Outlet
Title text:
Building Inspectors HATE This One Weird Trick
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3186/
N/L are “reversed” on the UK BS1363 standard vs US/EU Earthed plugs. By having two sets of N/L you can ensure that they are always correctly wired.
This is often why some adaptors seem to be “upside down”
Most devices can handle N/L being swapped, though.