英國擁有最好的插座與插頭設計

https://www.youtube.com/watch?v=UEfP1OKKz_Q

The main thing to know about the U.K. wall plug is that while it is bulkier than other designs, every ounce of that additional bulk makes the design safer. This is accomplished in four main ways:

• Prong Design: Like standard U.S. grounded plugs, the U.K. wall plug has three prongs. But the design of these prongs makes it nearly impossible for you to shock yourself accidentally. Unlike in U.S. plugs, half of each prong is coated in insulation. Because of this, even if a plug is not fully inserted into a socket, touching the exposed part of the prongs can't give you a shock.

水火地線的插頭有一半是絕緣材質，即使插一半也不會觸電


• Socket Design: Any kid with a fork or a screwdriver can light his hair on fire in the United States by jamming it into a wall socket. Not so in England, where it would take at least two screwdrivers to manage the same calamitous trick. The U.K. plug is designed so that the grounding prong is slightly longer than the prongs responsible for transferring current. Like a tumbler in a lock, this grounding prong is responsible for "unlocking" the socket, giving access to the more dangerous live and neutral terminals.

插座的地線座也有水火地線開關的功能，要兩支起子同時才有可能會觸電，減少兒童去觸電的風險

• Built-In Fuses: During World War II, a copper shortage resulted in the British government putting fuses into every plug, instead of wiring them directly. Although the built-in fuse adds bulk to the U.K. plug design, it's also safer: In case of an unexpected electrical surge, the fuse simply blows and the electricity shuts off, preventing fires, electrocutions, and other accidents. It also makes U.K. plugs easier to fix.

電源線的頭內有保險絲


• Circuit Design: Finally, there's the wiring inside the plug itself. Not only is it extremely intuitive, but it has been thoughtfully designed so that if the plug is tugged and the wiring frays, the live and neutral wires are the first to become disconnected, while the grounding wires--the ones responsible for preventing human electrocution when they come in contact with a circuit--are the last to fray.

It's a truly brilliant design. The only caveat is that, as with Lego, the rugged, bottom-heavy design of a U.K. plug makes it an almost scientifically perfect caltrop.

插頭內部線路設計，中、火線會先斷，最後才是地

http://www.fastcodesign.com/3032807/...ckets-on-earth

http://www.my-hiend.com/leoyeh2/2014b/daily002274.jpg