I have read so many threads regarding "people" unknowingly energizing a circuit that is being worked on or worse yet, energizing a locked out/tagged out circuit by defeating LOTO device... This made me think of a simple invention (If someone would like to take it to market, be my guest!) Or better yet - make a homemade version and protect yourselfs now! Here it is: Build a compact, LOUD! siren into a small box with an appropriatly sized transformer for the panel being worked on to power siren. The device would have three wires with clips on each lead. This device could be placed inside of the panel being worked on. Two clip leads could be attached to a circuit that is not being serviced for continuous power. The third (sensing) lead would be clipped onto the breaker screw that is being serviced. When someone energizes this now (monitored) circuit that is being worked on, the siren would scream thru the conduits allerting the electrician of imminent danger. A simple control circuit could also be added so that even if the person who, surprized by the now (screaming) energized circuit quickly turns off the circuit, the siren would continue to scream untill the sparky resets it! If we wanted to get real fancy, one could add a transmitter at the panel with a belt worn receiver/pager to allert the electrician who is too far away from the panel to hear the siren. Hell, why not even add a cheap small digital camera to photograph the suckers - No question of "who did it" then! Take care! J.-
