SHS2 Applied Technology · Semester 2 Week 12: Electrical Systems Design

Lesson notes

Learning Objectives

Indicator: 2.5.1.LI.10 - Conduct relevant tests on an Installation that has been completed

By the end of the lesson, learners can:

State the three main types of tests carried out on a completed electrical installation (continuity test, polarity test, and insulation resistance test) and explain the purpose of each.
Describe the step-by-step process for carrying out a continuity test, a polarity test, and an insulation resistance test on a completed installation.
Demonstrate the correct use of a multimeter and a megger to perform at least one of the three tests on a given circuit.
Analyse the results of each test and decide whether the installation is safe and ready to be energised, giving reasons for the decision.
Prepare a written group report on the testing process, including the steps followed and the readings obtained.

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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.10 - Conduct relevant tests on an Installation that has been completed
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.L1.10"
Curriculum reference: NaCCA curriculum document, p. 117

Exemplars (from the NaCCA curriculum)

Collaborative/talk for learning : in a mix- ability group task students to discuss
- Types of Test ( eg: continuity test, Polarity test and Insulation Resistance test)
- Importance of each type of test
- Process of carrying out each test
Experience learning/collaborative learning:
- Engage learners in groups to conduct the following activities
- Watch video on how tes t ing is done and write a report on the steps involved in conducting each type of test. Demonstrate how to carry out each test.

Assessment (2.5.1.AS.10). 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