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Electrical Hazard Awareness Powerpoint Presentation


Title: Electrical Hazard Awareness Powerpoint Presentation Subject: Resources Safety Formerly 001276.Manual.Manager.ppt Formerly 000001.carlin.eddington.ppt Formerly ... – PowerPoint PPT presentation

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Date added: 26 July 2020
Slides: 25
Provided by: Su50
Learn more at: http://www.dmp.wa.gov.au


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Title: Electrical Hazard Awareness Powerpoint Presentation

Please read this before using presentation
  • This PowerPoint has been produced for public use
    by Resources Safety staff.
  • The content has been approved for external
    presentation by the Director Mines Safety and
    Manager Safety Communications, and must not to be
    amended without their permission.

Electrical hazard awareness
What does hazard mean?
  • Hazard means
  • any potential or actual threat to the wellbeing
    of people, machinery or environment
  • Electrical hazard safety means
  • taking precautions to identify and control
    electrical hazards

Why know about it?
  • Because failing to take the necessary precautions
    can lead to
  • injury or death
  • fire or property damage

What are the safety priorities?
  • Electrical hazards exist in almost every
    workplace. Common causes of electrocution are
  • making contact with overhead wires
  • undertaking maintenance on live equipment
  • working with damaged electrical equipment, such
    as extension leads, plugs and sockets
  • using equipment affected by rain or water ingress

How do you respond to electrical incidents?
  • If you come across a person receiving an electric
  • if possible, disconnect the electrical supply
  • assess the situation never put yourself at risk
  • take precautions to protect yourself and anyone
    else in the vicinity
  • apply the first aid principles (e.g. DRSABCD)
  • assess the injuries and move the casualty to a
    safe area if required
  • administer first aid if trained
  • seek urgent medical attention

Do you want to be a victim?
  • You could be the victim if you
  • dont follow proper procedures around electricity
  • use electrical equipment improperly
  • use faulty electrical equipment

What are the types of injuries?
  • Burns
  • Shocks
  • Falls
  • Keep safe
  • Know how to control electrical hazards

What are the levels of effect of current?
AC current (mA) Effect on human body
1 Slight tingling sensation
2-9 Small shock
10-24 Muscles contract causing you to freeze
25-74 Respiratory muscles can become paralysed pain exit burns often visible
75-300 Usually fatal ventricular fibrillation entry exit wounds visible
gt300 Death almost certain if survive will have badly burnt organs and probably require amputations
What should you do in an electrical emergency?
  • For low voltage electricity gt50 V AC and 110 V DC
  • remove the source of electricity supply
  • commence CPR if trained
  • call the emergency number on site
  • For high voltage electricity gt1000 V
  • call the emergency number for your site
  • dont go near the casualty
  • dont touch the casualty or try to free them with

Should you report electrical incidents?
  • Electricity is invisible this in itself makes
    it dangerous
  • It has great potential to seriously injure or
  • The company has a duty of care to its employees
    and contractors
  • Everyone is exposed to electrical hazards, not
    just electricians
  • Report all electrical shocks and near misses
  • All employees can be exposed to electrical
  • Hazards. they should receive electrical hazard
  • training at the commencement of their

Can you protect yourself from electricity?
  • Dont wear metal objects
  • Turn power off
  • Wear appropriate clothing
  • Dont touch live parts
  • Dont install or repair electrical equipment
  • Use qualified personnel
  • Clean and dry leads and plugs before use
  • Use PPE

What are other safety measures?
  • Heed warning signs
  • Use the right equipment
  • Study the operation manual
  • Take care of extension leads
  • Use only approved extension lamps
  • Dont pull on leads
  • Use residual current devices RCDs
  • Use the proper fuses and circuit breakers

Regular safety inspections
  • are a part of YOUR job...
  • Electrical equipment should be checked each time
    before use for defects
  • If not tagged or the tag is out of date then
    report it and place it out of service

Should you be aware of powerlines?
  • Do you know if there are overhead powerlines on
    your site?
  • Do you know where they are located?
  • Do you know what the safe work clearance is?
  • Strict regulations are laid down to cover any
    work that may have to be performed close to
    overhead powerlines

What is a powerline corridor?
  • MSI Regulation 5.28 defines a powerline corridor
    as the area under any overhead powerline that has
    not been properly isolated, and 10 metres either
    side of the powerline.
  • It is essential that these areas are respected.
    They are there for the safety of everyone
  • Do not store equipment, machinery, buildings or
    structures in powerline corridors
  • Do not construct, fabricate or maintain
    structures, buildings, machinery or equipment
    in powerline corridors

Can a powerline be approached safely?
  • Up to and including to 33 kV
  • 2.3 m when passing underneath and 3 m when
    passing to the side
  • Above 33 kV
  • 4 m when passing underneath and 6 m when passing
    to the side

Who can access substations?
  • Only trained and authorised personnel may enter
    and work inside a substation
  • To enter a substation you must complete the
    substation entry training
  • Access is restricted for any cabinet with exposed
    energized parts
  • All electrical work must to be recorded and
  • entered into the Electrical Mines Record Book,
  • and the Electrical Supervisor informed

What are electric shock hazards?
  • Arc welding can and has killed people in high
    risk environments
  • Everyone involved needs to better understand the
    hazards, adopt sound practice and use appropriate
    safety devices
  • Study and adhere to the Code of Practice WTIA
    Tech Note 7-04
  • Use safety devices such as manual trigger
    switches and voltage reducing devices (VRDs)
  • Under adverse conditions, strive to improve
    control measures (e.g. presence of moisture as
    sweat or rain)

A welding incident
  • Assistant hands welder a metal object. Resultant
    current is 35 mA
  • I V/R 67/1900 35 mA
  • Result Assistant survived but welder died

Do you have permission to dig?
  • Be aware of the potential hazard from buried
    electrical cables for the following activities
  • excavation
  • drilling
  • trenching
  • levelling
  • digging
  • driving of stakes or pegs
  • Do not commence excavation work near buried
    cables unless a permit has been issued by an
    authorised person
  • Do you know what precautionary measures need to
    be taken?

What risk assessment?!
Is this a problem?
The key messages are
  • The risk of electric shock from correctly
    installed and maintained power sources is
    negligible, provided that sensible precautions
    are taken by the operator and correct work
    procedures are followed
  • Ensure that the right person is carrying out
    electrical work licensed versus competent
  • Electricity is essential but, improperly used, it
    can be DEADLY!
  • To STAY ALIVE, you have to STAY ALERT
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