In this episode, Russ shows us an alarming wiring violation. As per Sec. 760.130(B)(1) of the 2017 Edition of the NEC, these cable splices should be placed in a listed box, enclosure or fire alarm ...
This burglar alarm system circuit is using a infrared proximity detector that triggers an alarm when the rays falling on its sensor are interrupted. It is different from others burglar alarm systems ...
ALEXANDRIA, Va., Dec. 1 -- Joseph Reghetti of Las Vegas, and Barry Kenneth Anspach of Centennial, Colo., have developed methods and apparatus for generating a data structure indicative of an alarm ...
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