Why Didn't That Shock Kill You?

Your thumb touches a live wire, the house goes dark, and you are fine. A small ring of iron in the box in your hallway did a sum, found the current you were stealing, and let go of a spring in a fraction of a second. 00:00 Why are you still standing? 00:54 The jolt, a thousand times slower 02:33 The students who gripped a live rod 03:58 Where the rules went first 04:41 Guarding the wires, not you 06:30 The arc you never see 07:20 When the guard was a wire 08:11 A fuse in every plug 09:02 The one touch it misses 09:36 The test button 10:16 Why are you still standing? Hidden Machines opens up everyday things to show how they really work. #electricity #howitworks #engineering