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1SafeWorkAustraliaContactInformationPhone1300551832|Emailinfo@swa.gov.au|Webwww.swa.gov.au978-1-74361-768-7[Multi-Vol.Set]INCIDENTSANDSCENARIOSCASESTUDIESThefollowingexamplesillustratetheriskmanagementprocessandcombinethepracticalinformationintheGeneralguideforworkinginthevicinityofoverheadandundergroundelectriclines.Case1.Incident–mobilecraneoperationsAmobilecranecameintocontactwith132,000voltoverheadelectriclinesadjacenttoaworkplace.Thecranedriverhadslewedtheboomofthecranetowardstheoverheadelectriclinesresultingintheliftingchainsswingingoutwards,makingcontactwiththeelectricline.Thecranesustainedextensivedamagetothetyres,liftingropeanditselectricalsystem.Contributingfactorsincludedfailureto:„maintainrelevantapproachdistancetotheelectriclinesandconsiderthepossibilityoftheliftingchainsswingingtowardstheoverheadelectriclineswhenthecranewasoperated„doariskassessmentoftheworkplace„usesuitableriskcontrolmeasuresforthework,and„useasafetyobservertoobservethecraneoperationsneartheelectriclines.Case2.SettingupamobileconcretepumpAprojectmanagerusesconcretepumpsregularly.Animportantpartofsettingupconcretepumpingequipmentistoconsiderthevicinityofoverheadelectriclinesintheriskmanagementprocess.Toeliminateorminimiseriskstheprojectmanager:„identifiedthenogozoneminimumclearancedistancefortheconcreteplacementboomaftertalkingwithhiscontractorsandtheElectricitySupplyAuthority.Heallowedforswayandsagofthelinesanddocumentedthisinariskassessment„ensuredthepumpcouldbesetuponsolidgroundtopreventinadvertentmovementofboomsenteringnogozones„ensuredasafetyobserverwatchedwhilepumpoperatorssetupandtheykeptthepipesawayfromnogozonesandparalleltothegroundwherepossible,and„ensuredasafetyobserverwatchedtowarntheoperatoriftheplacementboomapproachedthenogozone.Case3.Incident–scaffoldingworkAworkerdiedandthreeapprenticeroofplumberswereinjuredwhenattemptingtomovean8.9metrehighaluminiumscaffoldataconstructionsite.Theworkersweremovingthemobilescaffoldoversoftsandwhenthecastorwheelslocatedatthebaseofthescaffoldsankintothesandcausingittofallandmakecontactwith33,000voltoverheadelectriclineslocatedadjacenttotheconstructionsite.Contributingfactorsincludedfailureto:„doariskassessmentofthesiteandidentifyandconsiderthegroundconditionsatthesite,and„usesuitablecontrolmeasuresforthework.2JULY2014Case4.Incident–farmmachineryAfarmeroperatingaharvesteronhisownpropertywasfatallyelectrocutedwhentheraiseddeliverychutecontacted11,000voltoverheadelectriclines.Thefarmerwasawareoftheelectriclinesandhadpreviouslywarnedotherstostayclear.Contributingfactorsincludedfailureto:„maintainrelevantapproachdistancetotheelectriclines,and„doariskassessmentandusesuitablecontrolmeasurestoensurenogozoneswereenforced.Case5.Incident–irrigationpipesonaruralpropertyAfarmerworkinginafieldwasfatallyelectrocutedwhenheraisedametalirrigationpipeinto22,000voltoverheadelectriclineswhiletryingtoshakeouttheverminblockingthepipe.Contributingfactorsincludedfailureto:„identifytheriskofraisingobjectsintotheoverheadelectriclineswhentheheightwasknown,and„doariskassessmentofthesiteandusesuitablecontrolmeasures.Case6.Ruralworkplace–canehaulageAcanefarmerattendedasafetyconferenceandheardaboutelectriclinesafety.Theneedforcanehauloutandharvestingcontractorstomanagetherisksaroundoverheadelectriclineswasemphasised.Thefarmerhadalsoattendedatrainingprogram...