Electrical Systems… · SHS2 Applied Technology

Lesson notes

Learning Objectives

Indicator: 2.5.1.LI.9 - Earth an installation work in accordance with rules and regulations

By the end of the lesson, learners can:

Explain the term “earthing” and distinguish between earthing and neutral connection in an electrical installation.
Outline at least four reasons why earthing is essential in every electrical installation.
Describe the step-by-step process of earthing an installation, including the components involved and the tools used.
Demonstrate the correct procedure for earthing a consumer’s installation using appropriate tools and materials, following IEE regulations.
Justify, using critical reasoning, the consequences of a poorly earthed or unearthed installation in a real-life situation.

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Curriculum details

Strand: Electrical and Electronic Technology (Strand 5)
Sub-strand: Electrical Systems Design (5.1)
Content standard: 2.5.1.CS.1 - 2.5.1.CS.1 Demonstrate understanding of House Wiring 2.5.1.LO.1 Apply appropriate tools and wiring systems to carry out key wiring processes.
Indicator: 2.5.1.LI.9 - Earth an installation work in accordance with rules and regulations
Suggested placement: Semester 2, Week 12 (Week 32 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

indicator text - p.117: prints the learning-indicator code as "2.5.1.L1.9"
Curriculum reference: NaCCA curriculum document, p. 117

Exemplars (from the NaCCA curriculum)

Collaborative/ talk for learning: I n mix-ability groups and with the use of the internet, task learners to undergo the following activities:
- Explain the term 'earthing'
- Outline the various reasons for earthing
- Describe the Process of earthing
Experience learning/collaborative learning: Engage learners in groups to conduct the following activities
- Watch video on how earthing is done and write a report on the steps involved in earthing
- Demonstrate the process of earthing

Assessment (2.5.1.AS.9). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Cables
- Trunkings
- conduit pipes
- accessories
- megger
- fittings
- multimeter