UNL Safety Colloquium.ppt

UNLSafetyColloquiumLaboratoryElectricalSafetyFall,,.,PMPLincolnElectricSystem(LES)Whyisthisrelevanttome?Youworkinalaboratory(identsare…)AccidentstatsInjurystats difficulttofind,Fatalitystats probablyrare (but,whybefamous?)identstatsInjurystats difficulttofind,Fatalitystats probablyrare (but,whybefamous?),firstsomebasics.....esinonlytwoflavors,,invaryingpotential,.,.(******@50Hz),lookslikeonanoscilloscopeFrequency(onecycleorhertz)WhatDirectCurrent(steadystate)lookslikeonanoscilloscope0+WhataDirectCurrentPULSElookslikeonanoscilloscope0Butlet’‘path’pletea‘circuit’.(circuit).HOWEVER-electricitytravelsat(nearly)thespeedoflight,thereforeALLyourprecautionshavetofocusonpreventingapathbecauseafterapath(circuit)isestablisheditmaybetoolate.