• 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
Please read this before using presentation
What does hazard mean?
• 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
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 shock:
• if possible, disconnect the electrical supply (switch?)
• assess the situation – never put yourself at risk
• take precautions to protect yourself and anyone else in the
• apply the first aid principles (e.g. DRSABCD)
• assess the injuries and move the casualty to a safe area if
• administer first aid if trained
• seek urgent medical attention
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
>300 Death almost certain; if survive will have
badly burnt organs and probably require
What should you do in an electrical emergency?
For low voltage electricity >50 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 >1000 V
• call the emergency number for your site
• don’t go near the casualty
• don’t touch the casualty or try to free them with anything
Should you report electrical incidents?
• Electricity is invisible – this in itself makes it dangerous
• It has great potential to seriously injure or kill
• The company has a duty of care to its employees and
• 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
EMPLOYMENT AND REGULAR REFRESHER TRAINING.
Can you protect yourself from electricity?
• Don’t wear metal objects
• Turn power off
• Wear appropriate clothing
• Don’t touch live parts
• Don’t 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
• Don’t pull on leads
• Use residual current devices – RCDs
• Use the proper fuses and circuit breakers
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
LOOK UP AND LIVE
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
• 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)
Do you have permission to dig?
Be aware of the potential hazard from buried electrical cables for
the following activities:
• 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?
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
• 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
D - Danger
R - Response
S – Send for help
A - Airway
B - Breathing
C - CPR
D - Defibrillation
This absolute shocker is a shocker in the literal sense.
If you look carefully, you will notice that the power lead plug-top is not designed and intended for use within an Australian socket outlet.
This should have warned the user that the appliance may not have been designed for use within the Australian 240 Volt system, but rather the 110 Volt system in so many other countries. But it seems that some people just wont take the hint.
What we see here is a dangerously novel variation on the age-old stupidity of trying to force a square peg into a round hole.
If it won’t fit – don’t use it!