EXPERIMENT NO. - 03 :- Demonstration of Electrical Safety Precautions & Safe Working Practices

 

1. Aim of the Experiment

• To identify, demonstrate, and apply general and electrical safety precautions in the laboratory/workshop environment.
• To understand proper personal protective equipment (PPE) selection and Lockout/Tagout (LOTO) procedures.
• To demonstrate safe handling of electrical tools, grounding practices, and fire extinguisher selection for electrical fires.

2. Tools & Safety Equipment Required

S.No.	Safety Equipment / Tool	Specification / Purpose
1	Insulated Hand Tools	Screwdrivers, pliers, and cutters rated up to 1000V AC (IEC 60900 certified).
2	Personal Protective Equipment (PPE)	Insulated rubber gloves, safety goggles, electrical hazard (EH) rated footwear, anti-static wrist strap.
3	Lockout / Tagout (LOTO) Kit	Safety padlocks, lockout hasps, circuit breaker locks, and warning tags ("DO NOT OPERATE").
4	CO2 / Dry Powder Fire Extinguisher	Class C / Class E rated fire extinguishers designated for live electrical fires.
5	Digital Multimeter & Neon Tester	CAT III/IV rated voltage tester for verifying de-energized circuits before maintenance.

GOLDEN RULE OF ELECTRICAL SAFETY:

TEST BEFORE TOUCHING! Always treat all electrical circuits as live until you have personally verified that power is completely isolated using a calibrated voltage tester.

3. Lockout / Tagout (LOTO) Safety Protocol

Figure 1: Standard Lockout / Tagout (LOTO) Execution Sequence

4. Essential Electrical Safety Guidelines

Figure 2: Key Electrical Safety Rules in Laboratory Environment

Rule ID	Safety Parameter	Mandatory Safety Guideline
R-01	Equipment Inspection	Inspect insulation cables, plugs, and extension cords for fraying or exposed copper before connecting to mains supply.
R-02	Moisture Prevention	Never operate electrical equipment with wet hands, on damp floors, or near water sources.
R-03	Proper Grounding (Earthing)	Ensure metallic chassis of all equipment and power tools are properly connected to the earth conductor (3-pin plug system).
R-04	Overload Prevention	Do not overload multi-plug sockets or extension boards beyond their rated current capacity.
R-05	Electrical Fire Safety	NEVER USE WATER on an electrical fire. Use CO2 (Carbon Dioxide) or Dry Chemical Powder extinguishers only.

5. Trainee Evaluation & Observation Checklist

Task ID	Performance Task Demonstration	Assessment Status
T-01	Proper selection and wear of PPE (goggles, insulated footwear, gloves)	[   ] Satisfactory    [   ] Re-test
T-02	Verification of voltage-free condition using multimeter/tester	[   ] Satisfactory    [   ] Re-test
T-03	Demonstration of Lockout / Tagout (LOTO) steps on circuit breaker	[   ] Satisfactory    [   ] Re-test
T-04	Identification of appropriate fire extinguisher type for electrical fires	[   ] Satisfactory    [   ] Re-test

Instructor Feedback & Conclusion

The practical demonstration of electrical safety rules, Lockout/Tagout procedures, and emergency precautions was completed satisfactorily under workshop conditions.