important symbols

2. What is meant by safety
 Safety is a systematic approach to prevent
accidents that might arise out of failure of various
work parameter.
 Taking precautions to identify and control
electrical hazards.

3. Why do we need safety?
 We need safety to save our lives and others.
 To protect the transformers and other electrical
machines from harmful damages .
 Protect from fire or property damage.

4. EQIPMENTS REQUIRED
 These are safety tools and equipments .
 Gloves based on different voltage levels.
 Helmet and safe jackets.

6. Do’s & Don’ts
 Keep electrical equipment away from water
sources
 Use a C-rated fire extinguisher on electrical fires
and shut off power source
 Remove frayed or damaged equipment and cords
from service
 Remove plugs by pulling the plug; not the cord.
 Don’t wear metal objects
 Clean and dry leads and plugs before use

11. 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
amputations

13. WORK PERMIT

16. LINE CLEARENCE

18. At last precautions..!
 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!