SHS2 Applied Technology · Semester 2 Week 8: Electrical Systems Design

Lesson notes

Learning Objectives

Indicator: 2.5.1.LI.3 - Identify the various materials and accessories used for house wiring

By the end of the lesson, learners can:

Name at least eight different materials and accessories used in house wiring and state the function of each one.
Classify cables by size (cross-sectional area) and explain how size relates to the current-carrying capacity of the cable.
Match protective devices (fuses, circuit breakers, residual current devices) to the specific faults they guard against in a domestic circuit.
Select appropriate cable sizes and accessories for given household wiring scenarios, justifying their choices with reference to current rating and application.
Work in mixed-gender pairs to measure and record the resistance of sample cables using a multimeter, and interpret the readings.

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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.3 - Identify the various materials and accessories used for house wiring
Suggested placement: Semester 2, Week 8 (Week 28 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.
Curriculum reference: NaCCA curriculum document, p. 114

Exemplars (from the NaCCA curriculum)

Talk for learning/collaborative learning: In mixed-ability or mixed-gender groups, guide learners to undertake the following activities: Identify materials and accessories required for carrying out house wiring and state the uses for each of them e.g.; different sizes of cables and accessories, protective devices, etc.
Problem-Based Learning: Work in pairs to Determine the current-carrying capacity of the various cables Ensure all learners participate in all varieties of practical activities and project work given mixed gender groupings as well.

Assessment (2.5.1.AS.3). 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