Electrocution and its causes and First aid and items in a first aid box for JSS 1

Class: JSS 1
Term: First Term
Week: 9
Age: 12 years
Duration: 45 minutes
Subject: Solar PV Installation and Maintenance
Curriculum Theme: Solar Photovoltaics System for Electricity Generation
Focal competence: Demonstrating electrical safety practices in Solar PV installation and maintenance
Skills:

• Applying electrical safety precautions
• Using personal protective equipment appropriately

Previous Lesson: Personal protective equipment and safety gears
Topic: Electrical Safety Precautions: Electrocution And Its Causes
Subject Matter: Electrocution and its causes, First aid and items in a first aid box

Specific Objectives

By the end of the lesson, pupils/students should be able to:

Cognitive Domain

• State causes of electrocution.
• Describe electrocution.

Affective Domain

• Appreciate the importance of electrical safety in Solar PV work.
• Show willingness to apply first aid principles in emergencies.

Psychomotor Domain

• Identify items in a first aid box.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Basic Technology for Junior Secondary Schools Book 1
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• PPE/safety gears (e.g., safety gloves, safety glasses, insulated tools)
• A complete first aid box with its contents
• Electrical safety charts or posters
• Pictures or diagrams showing electrocution scenarios
• Solar PV tools/materials (for context)

Rationale for the Lesson

This lesson is crucial for students to understand the dangers of electricity, especially in Solar PV installation and maintenance. Knowledge of electrocution and basic first aid can prevent serious injuries or fatalities. It equips students with foundational safety practices essential for any work involving electrical systems.

Prerequisite/Previous Knowledge

Students should have a basic understanding of electricity and the general concept of safety in a workshop environment.

Lesson Content/Board Summary

Electrical Safety Precautions: Electrocution And Its Causes

Description of Electrocution

Electrocution is the accidental death or serious injury caused by electric shock. It occurs when a person comes into contact with an electrical current, which then passes through their body, disrupting normal bodily functions, especially the heart and nervous system.

Causes of Electrocution

Electrocution can be caused by various factors, particularly in electrical work environments like Solar PV installation. Common causes include:

1. Contact with live wires: Touching exposed or damaged electrical wires that are energized.
2. Faulty equipment: Using defective electrical tools or appliances that have damaged insulation or internal wiring.
3. Improper grounding: Lack of proper grounding in electrical systems or equipment, which prevents fault currents from safely dissipating.
4. Wet conditions: Working with electricity in damp or wet environments, as water is a good conductor of electricity and increases the risk of shock.
5. Overloaded circuits: Plugging too many devices into one outlet or circuit, leading to overheating and potential electrical faults.
6. Lack of Personal Protective Equipment (PPE): Not wearing appropriate safety gear like insulated gloves, safety boots, or eye protection when working with electricity.
7. Unsafe work practices: Failing to follow established safety procedures, such as not turning off power before working on circuits.
8. Accidental contact with high voltage lines: Coming into contact with overhead power lines or other high-voltage sources.

First Aid for Electrocution

First aid for electrocution focuses on ensuring safety, calling for help, and providing immediate care to the victim. The steps include:

1. Ensure safety: Do not touch the victim while they are still in contact with the electrical source. Turn off the power supply immediately if possible (e.g., switch off the main breaker). If the power cannot be turned off, use a non-conductive material (like a dry wooden stick or plastic pipe) to separate the victim from the source.
2. Call for help: Dial emergency services (e.g., 112 or 911 in some regions) immediately.
3. Check for breathing and pulse: Once the victim is safely separated from the power source, check if they are breathing and have a pulse.
4. Perform CPR if necessary: If the victim is not breathing and has no pulse, begin Cardiopulmonary Resuscitation (CPR) if you are trained.
5. Treat burns: Cover any burns with a sterile dressing or clean cloth. Do not apply ice or ointments.
6. Keep the victim warm: Cover the victim with a blanket to prevent shock.
7. Stay with the victim: Remain with the victim until medical help arrives.

Items in a First Aid Box

A first aid box is a collection of supplies and equipment for giving first aid. Essential items include:

1. Antiseptic wipes/solution: For cleaning wounds and preventing infection.
2. Cotton wool: For applying antiseptics or cleaning.
3. Bandages (various sizes): To cover wounds, support sprains, or hold dressings in place.
4. Sterile gauze pads/dressings: For covering and protecting wounds.
5. Adhesive tape: To secure bandages and dressings.
6. Painkillers: Such as paracetamol or ibuprofen, for minor pain relief.
7. Scissors: For cutting bandages or clothing.
8. Tweezers: For removing splinters or small debris from wounds.
9. Safety pins: For securing bandages.
10. Gloves (disposable): To protect both the first aider and the victim from infection.
11. Burn cream/gel: For treating minor burns.
12. Thermometer: For checking body temperature.
13. First aid manual: A guide on how to administer first aid for various injuries.

Specific Safety Rules in Solar PV Installation

When working with Solar PV systems, specific safety rules must be followed to prevent electrocution and other hazards:

1. Always assume all electrical components are live until proven otherwise.
2. Use appropriate Personal Protective Equipment (PPE) at all times, including insulated gloves, safety glasses, hard hats, and safety boots.
3. Never work alone on electrical systems; always have a partner who can assist in an emergency.
4. Ensure all tools are insulated and in good working condition.
5. Disconnect power from the grid and the solar array before commencing work.
6. Use lockout/tagout procedures to ensure power remains off during maintenance.
7. Avoid working in wet conditions or during thunderstorms.
8. Properly ground all equipment and systems.
9. Follow manufacturer’s instructions for all Solar PV components.
10. Keep the work area clean and free from clutter to prevent trips and falls.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Engaging/Recalling

Teacher’s Activity: The teacher greets the students and asks them about the importance of safety in any work environment, especially when dealing with electricity. The teacher then introduces the topic: Electrical Safety Precautions, focusing on electrocution and first aid.

Pupils’ Activity: Students respond to questions about safety and listen attentively to the introduction of the new topic.

Learning Point: Importance of safety

Step 2: Description of Electrocution

Time: 8 minutes

Teaching Skill: Explanation/Definition

Teacher’s Activity: The teacher defines electrocution, explaining that it is serious injury or death from electric shock. The teacher uses simple language and examples to make the concept clear, possibly showing pictures of potential hazards.

Pupils’ Activity: Students listen and ask questions for clarification, describing electrocution in their own words.

Learning Point: Meaning of electrocution

Step 3: Causes of Electrocution

Time: 8 minutes

Teaching Skill: Explanation/Listing

Teacher’s Activity: The teacher explains the common causes of electrocution, such as contact with live wires, faulty equipment, and wet conditions. The teacher uses the electrical safety chart to illustrate these points.

Pupils’ Activity: Students listen, take notes, and state various causes of electrocution.

Learning Point: Electrocution causes

Step 4: First Aid for Electrocution

Time: 6 minutes

Teaching Skill: Instruction/Guidance

Teacher’s Activity: The teacher introduces the concept of first aid for electrocution, emphasizing the immediate steps to take, such as ensuring safety and calling for emergency services. The teacher explains what to do and what not to do.

Pupils’ Activity: Students listen and discuss the initial steps for first aid.

Learning Point: Electrocution first aid

Step 5: Items in a First Aid Box

Time: 6 minutes

Teaching Skill: Demonstration/Identification

Teacher’s Activity: The teacher presents a first aid box and demonstrates its contents, identifying each item and explaining its use. The teacher allows students to observe and handle some safe items (e.g., bandages, cotton wool).

Pupils’ Activity: Students observe, identify items in the first aid box, and ask questions about their uses.

Learning Point: First aid box items

Step 6: Specific Safety Rules in Solar PV Installation

Time: 4 minutes

Teaching Skill: Reinforcement/Application

Teacher’s Activity: The teacher highlights specific safety rules relevant to Solar PV installation, such as using PPE, disconnecting power, and avoiding wet conditions. The teacher emphasizes the importance of these rules.

Pupils’ Activity: Students listen and discuss the importance of specific safety rules.

Learning Point: Solar PV safety rules

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. What is electrocution?
2. Mention three causes of electrocution.
3. Name four items found in a first aid box.
4. What is the first thing you should do if someone is being electrocuted?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Electrocution knowledge assessment

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on electrocution, its causes, first aid, and first aid box items into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Recording lesson notes

Step 9: Conclusion

Time: 1 minute

Teaching Skill: Summarising

Teacher’s Activity: The teacher briefly reminds students about the importance of electrical safety and being prepared for emergencies. The teacher encourages them to always prioritize safety.

Pupils’ Activity: Students listen and acknowledge the importance of the lesson.

Learning Point: Safety importance reinforcement

Continuous Assessment/Further Study

Type: Homework

Instruction: Answer the following questions in your notebook:

1. Describe what electrocution is in your own words.
2. List five causes of electrocution.
3. Draw a first aid box and label at least five items you expect to find inside.
4. Why is it important to turn off the power source before touching an electrocuted person?

Lesson Keywords

• Electrocution – Accidental death or serious injury from electric shock.
• First aid – Immediate help given to someone who is injured or ill before full medical treatment is available.
• Safety – The condition of being protected from danger, risk, or injury.
• Electrical shock – The physiological reaction or injury caused by electric current passing through the body.
• PPE – Personal Protective Equipment, gear worn to minimize exposure to hazards.
• First aid box – A container holding supplies for giving first aid.

Differentiation

For weaker learners: Provide simplified diagrams of electrocution causes and first aid steps. Allow them to identify fewer items from the first aid box. Use more visual aids and repeat key terms.

For faster learners: Encourage them to research additional electrical safety precautions or different types of PPE used in Solar PV installation. Ask them to explain the physiological effects of electric shock on the human body.

Suggested Lesson Videos

For further understanding, students can search on YouTube for:

• “Electrical safety for beginners”
• “First aid for electric shock”
• “What is a first aid kit and its contents”

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure you have actual PPE (e.g., insulated gloves, safety glasses) and a comprehensive first aid box with its contents. Visual aids like electrical safety charts or pictures of hazards will greatly enhance understanding. Begin by engaging students with questions about general safety before introducing the specific dangers of electrocution. Clearly define electrocution and explain its causes using practical examples relevant to Solar PV work. When discussing first aid, emphasize the “safety first” rule: never touch an electrocuted person until the power source is disconnected. Demonstrate the items in the first aid box, allowing students to identify and understand their uses. Reinforce specific safety rules for Solar PV installation throughout the lesson. Students should copy the Board Summary notes after the evaluation to consolidate their learning. Encourage questions and ensure all students can state causes of electrocution, describe it, and identify first aid items.