Prioritising WorkSafety Inmanyindustrialsettings,workersneedtofollowthecorrect proceduresforoperating,maintainingoraccessingsystems. Failuretoadheretothesemethodsmayresultnotonlyindamage toexpensiveequipment,butcanalsoposealethalthreattostaff. Onewaytoensurecorrectandsafe onwhichakeyisrequiredtoswitch lock,forexampletoanaccesspanel operationonasiteisbyusingtrapped thepoweronandoff.Withtrappedkey oradoor. keyinterlockingsystems. technology,thekeycannotberemo- vedunlessitisturnedtothe‘power Theengineermustswitchoffthe Averysimpleexampleofatrapped off’position.Thisverysamekeywillbe powertobeabletoobtainthekey. keysystemwouldbeapowersupply theonerequiredtooperateanother Asystemlikethispreventsstafffrom BestofDOM|39