Presentation by J.Majumder
Basic Electrical Safety
Be familiar with the fundamental concepts
of electrical shock.
Be familiar with the effect of elec...
To flow electricity must have a complete
path.

Electricity flows through conductors,
water, metal,
The human body is a...
DEFINITION OF ELECTRIC SHOCK
Electric shock is the sensation and muscular
spasm caused when electric current passes
throug...
Current through the body
Body resistance falls with increase in
Voltage.
5000 Ohms at 24 Volts .
2000 Ohms at 250 Volts.
Electrical

 More than 3 ma
painful shock

 More than 10 ma
muscle contraction “no-let-go” danger

 More than 30 ma
lun...
Fundamentals of Electrical Hazards

Hazards of Electricity
Shock/Burns/Death

To prevent

•Inspect all electrical tools an...
Preventing Accidental Electrical Contact

Electrocution

Time

Prevention

Insulate
Electrical

• What is Grounding?
– Protection from electric shock
• normally a secondary protection measure

• A ground is...
Electrical Burns
• Heating when electricity passes
through the body
– "Entry" and "exit" wounds caused by
electrical heati...
Safety First
Insulated tools
Certified insulated gloves (1000VAC)
Safety First
Safety First

Time
Unsafe practice
Meter safety

Meters and test leads with double insulation
Meters with recessed input jacks and test leads with shrouded i...
Do’s & Do not’s
Do get to know ship’s Electrical system.
Do operate equipment as per maker
recommendations.
Do maintain th...
Do’s & Do not’s
Lock out & tag out.
Do confirm that circuits are dead.
Discharge capacitors in the circuits if
any.
Always...
THANK
YOU
 Safe working electrical practice
 Safe working electrical practice
 Safe working electrical practice
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Safe working electrical practice

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To work in Electricity,one must be fully aware of the hadarzs and how to take precaution prior to start work .

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Safe working electrical practice

  1. 1. Presentation by J.Majumder
  2. 2. Basic Electrical Safety Be familiar with the fundamental concepts of electrical shock. Be familiar with the effect of electricity on the human body. Be able to recognize common electrical hazards.
  3. 3. To flow electricity must have a complete path. Electricity flows through conductors, water, metal, The human body is a good conductor.
  4. 4. DEFINITION OF ELECTRIC SHOCK Electric shock is the sensation and muscular spasm caused when electric current passes through the body This is to emphasize that it is current and NOT the voltage that causes electric shock. No matter how much voltage is present, you will get shock , if you will provide a ground-path for the electric current
  5. 5. Current through the body Body resistance falls with increase in Voltage. 5000 Ohms at 24 Volts . 2000 Ohms at 250 Volts.
  6. 6. Electrical  More than 3 ma painful shock  More than 10 ma muscle contraction “no-let-go” danger  More than 30 ma lung paralysis- usually temporary  More than 50 ma possible ventricular fib. (heart dysfunction, usually fatal)  100 ma to 4 amps  certain ventricular fibrillation, fatal Over 4 amps heart paralysis; severe burns. Usually caused by >600 volts Basic Electrical Safety Safety Safety Fundamentals of Electrical Hazards
  7. 7. Fundamentals of Electrical Hazards Hazards of Electricity Shock/Burns/Death To prevent •Inspect all electrical tools and equipment •Frayed, cut, broken wires ,grounding missing
  8. 8. Preventing Accidental Electrical Contact Electrocution Time Prevention Insulate
  9. 9. Electrical • What is Grounding? – Protection from electric shock • normally a secondary protection measure • A ground is a conductive connection – between electrical circuit or equipment and earth or ground plane – creates a low resistance to the earth. Basic Electrical Safety Safety Safety Fundamentals of Electrical Hazards
  10. 10. Electrical Burns • Heating when electricity passes through the body – "Entry" and "exit" wounds caused by electrical heating of the skin, because higher resistance of the skin results in heat generation (I2R) • Electrical arcing (arc burns are often caused by molten metal) • Contact with electrically heated surfaces • Electricity-ignited fires Electrical burns 11
  11. 11. Safety First
  12. 12. Insulated tools
  13. 13. Certified insulated gloves (1000VAC)
  14. 14. Safety First
  15. 15. Safety First Time
  16. 16. Unsafe practice
  17. 17. Meter safety Meters and test leads with double insulation Meters with recessed input jacks and test leads with shrouded input connectors Test leads with finger guards and non slip surface
  18. 18. Do’s & Do not’s Do get to know ship’s Electrical system. Do operate equipment as per maker recommendations. Do maintain the equipments as per maintenance procedures. Do ensure that all guards, Covers are securely fitted after works. Do inform before starting works. Fill up safety forms before starting works. All tools and measuring equipments are having t safety standard .
  19. 19. Do’s & Do not’s Lock out & tag out. Do confirm that circuits are dead. Discharge capacitors in the circuits if any. Always make marking of the terminals before removing. Confirm everything fitted back on completion of job
  20. 20. THANK YOU
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