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Advice for Newcomers E lectrical hazards GeePs

Advice for Newcomers E lectrical hazards GeePs. Contents. General informations about electricity Electrical hazards ( electric shock , electrocution , burns , fire and electrical arc blast) Preventive measures Good practices. General informations about electricity.

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Advice for Newcomers E lectrical hazards GeePs

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  1. Advice for NewcomersElectricalhazardsGeePs

  2. Contents • General informations about electricity • Electricalhazards (electricshock, electrocution, burns, fire and electrical arc blast) • Preventivemeasures • Good practices Electrical Hazards - GeePs

  3. General informations about electricity Electricityis a flow of electronscirculating in a conductivematerialthanks to a generator. It ischaracterizedby: • The voltage V • The currentI • The resistanceR • Ohm’slaw: U = R x I Electrical Hazards - GeePs

  4. Electricalhazards : electricshock and electrocution Accidentalleakage of currentthrough a person’s body (electricshock). It depends of severalthings: • The kind of current (DC or AC) and of itslevel currentiskilling • The resistivity of the body • The pathittakesthrough the body Effect : musculartetanisation(the victimcanor cannotshout, itisreversibleelectricalshock), ventricularfibrillation (hearttetany) electrocution Electrical Hazards - GeePs

  5. Electricalhazards: electricalburns Joule effect : heat produced by an electric current through the body Electricalburnscan come fromelectrical arcs, electrothermalburns, moltenmetal projection Electrical Hazards - GeePs

  6. Electricalhazards: fire and electrical arc blast • Short-circuits • Overheatingof cables • Overloadedelectrical circuits • Loose or rusted connections • Electrical circuits that are not properlyinsulated Electrical Hazards - GeePs

  7. Preventivemeasures How avoid accident? • Collective Protective Equipement (CPE) : Insulation, Guarding, Grounding, Electrical protective devices (switch, circuit breaker, fuses, groundfault circuit interrupter) • PersonnalProtection Equipment (PPE) : insulatinggloves, glasses, protective clothinguntreatednaturalfiber, safetyshoes Rescueresources • Emergency stop • Main breaker • Follow-up the emergency procedures • ► First-aid Electrical Hazards - GeePs

  8. Good Practices How avoid accident? • Prevention/behavior • Electrical installations must be checked • Do not overload sockets with multiple devices • Before doing any work ensure that the electrical installation is switched off • Only use equipment that is in good condition • Electrical certification (see for training courses) • Different classes of protection • Lower the voltage to a securelevel Electrical Hazards - GeePs

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