JSS3 First Term Basic Technology Lesson Note – Simple Electrical Wiring

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WEEK NINE (9)

TOPIC: SIMPLE ELECTRICAL WIRING

SUB-TOPICS:

ELECTRICAL CIRCUIT

• Meaning of electrical circuit and types
• Wiring tools and materials

Content Development (NOTES FOR FIRST LESSON/PERIOD ONE)

Sub-Topic 1:    Meaning of electrical circuit and types.

An electric circuit is a system that consists of the load, source of electricity, the key or switch and the connecting wires.

There are two types of electrical circuits (i) Series circuit (ii) parallel circuit.

Series circuit: In this arrangement, the load (resistors) is connected end to end. The same current flows through all appliances. If one stops functioning, the others stop.

Parallel circuit:  In this arrangement, the load(resistors) are connected side by side in parallel order. The same voltage is used. A fault which may occur in one electrical path will not affect the others.                   

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