Lesson Notes By Weeks and Term v4 - SHS 3

ELECTRICAL SYSTEMS DESIGN

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  3. SHS 3
  4. ELECTRICAL SYSTEMS DESIGN

Subject: Applied Technology

Class: SHS 3

Term: 2nd Term

Week: 13

Grade code: 2.4.1.LI.10

Strand code: 4

Sub-strand code: 1

Content standard code: 2.4.1.CS.1

Indicator code: 2.4.1.LI.10

Theme: ELECTRICAL AND ELECTRONIC TECHNOLOGY

Subtheme: ELECTRICAL SYSTEMS DESIGN

Lesson Video

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Performance objectives

Lesson summary

In our homes across Ghana, from Accra to Bolgatanga, we rely on electrical appliances every day: the pressing iron for our school uniforms, the kettle for our morning tea, and the blender for our fufu or groundnut soup. When these appliances stop working, it can be frustrating and costly to replace them. This lesson will empower you with the fundamental knowledge to diagnose and understand common faults in these appliances. This is not just a technical skill; it is a skill for life that can save you and your family money, ensure safety in your home, and even open up opportunities for you to start your own small repair business.

Lesson notes

Concept 1: What is Appliance Servicing?

Appliance servicing is the process of inspecting, testing, diagnosing, repairing, and maintaining electrical appliances to ensure they function correctly and safely. It involves more than just fixing what is broken; it is a systematic process that requires careful observation, logical thinking, and a commitment to safety.

The Servicing Mindset: Safety and Honesty Safety First (SAFETY FIRST!): Electricity can be dangerous. The number one rule is ALWAYS DISCONNECT THE APPLIANCE FROM THE POWER SOURCE before opening it or performing any tests with a multimeter. Honesty is Key: As a technician, your reputation is built on trust. Never invent a problem that doesn't exist. If the fault is simple (like a blown fuse in the plug), fix it and be honest about it. This builds customer loyalty and is the hallmark of a true professional. Concept 2: Types of Gadgets/Circuits to be Diagnosed

Let's examine three common appliances found in Ghanaian homes.

Evaluation guide