2. Safety in Electrical Labs
Safety of Humans , Lab Equipment and Building Presented by : M .Naved Lab Engineer Mechatronics Engineering Department Air University Islamabad

3. Presentation Contents
Electrical Safety Signs
Fire Safety Signs
Electrical shocks
What to do after Electric Shock
Kind of Shock
Dangerous Currents
How to keep yourself Safe

4. Safety Signs
Safety signs are the symbols which keep workers alert from dangers
General Warning Symbol
HighVoltageSymbol

5. Fire Safety Signs
Fire Alarm
Fire extinguishers

6. Electrical Shocks
Electrical Shock is the physiological reaction or injury caused by electric current passing through the human body. Types: Natural Shocks(Lighting) Artificial Shocks(in labs or homes)

7. Electrical Shocks

8. Electrical Shocks(How Accidents Occur)

9. What to do after Electric Shock
Look first. Don't touch. 
The person may still be in contact with the electrical source. Touching the person may pass the current through you.
Turn off the source of electricity, if possible.
 If not, move the source away from you and the person, using a dry, non- conducting object made of cardboard, plastic or wood.
Check for signs of circulation (breathing, coughing or movement). 
If absent, begin cardiopulmonary resuscitation (CPR) immediately.
Prevent shock. 
Lay the person down and, if possible, position the head slightly lower than the trunk with the legs elevated.

10. Kind of Shocks Basic Factors Differentiate kind of Shocks
Amplitude of Current
Duration of Current
Frequency

11. AC and DC Shocks Difference is just frequency
High amplitude for short time is dangerous
Low amplitude for long time also dangerous
High amplitude with long time is too dangerous
In DC one time muscle contraction takes place
In AC multi-time muscle contraction takes place
AC shock push a person away
DC shock attracts a person

12. Dangerous Voltages and Currents

13. How to keep yourself Safe
Do not touch anything until you know about it
Always try to use your right hand for circuiting
Switch off electric power for wiring
Use fuses during circuit designing
Always switch off while leaving lab or experiment
First understand circuit then implement it
Always do wiring neat and clean
Do not short circuit

14. For further Studies Safety courses HSE (health safety and environment)
OSHA (occupational safety and health administration)
IOSH (institute of occupational safety and health)
NEBOSH (national examination board of occupational safety and health)