January 31st, 2016
(written by lawrence krubner, however indented passages are often quotes). You can contact lawrence at: firstname.lastname@example.org
Yet another story on the slow speed of technological change. Interesting:
• 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.
• 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.
• 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.