basic electrical concepts, including: electrotechnology industry static and current electricity production of electricity by renewable and non-renewable energy sources transportation of electricity from the source to the load via the transmission and distribution systems utilisation of electricity by the various loads basic calculations involving quantity of electricity, velocity and speed with relationship to the generation and transportation of electricity basic electrical circuit, including: symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram purpose of each component in the circuit effects of an open circuit, a closed circuit and a short circuit multiple and sub-multiple units effects of electrical current, including: physiological effects of current and the fundamental principles listed in AS/NZS 3000 for protection against this effect basic principles by which electric current can result in the production of heat, the production of magnetic fields, and a chemical reaction typical uses of the effects of current mechanisms by which metals corrode fundamental principles listed in AS/NZS 3000 for protection against the damaging effects of current electromotive force (EMF) sources, energy sources and conversion electrical energy, including: basic principles of producing an emf from the interaction of a moving conductor in a magnetic field basic principles of producing an emf from the heating of one junction of a thermocouple basic principles of producing an emf by the application of sun light falling on the surface of photovoltaic (PV) cells basic principles of generating an emf when a mechanical force is applied to a crystal (piezo electric effect) principles of producing an electrical current from primary, secondary and fuel cells input, output, efficiency or losses of electrical systems and machines effect of losses in electrical wiring and machines principle of conservation of energy resistors, including: features of fixed and variable resistor types and typical applications identification of fixed and variable resistors various types of fixed resistors used in the electrotechnology industry e.g. wire-wound, carbon film and tapped resistors various types of variable resistors used in the electrotechnology industry e.g. adjustable resistors: potentiometer and rheostat, light dependent resistor (LDR), voltage dependent resistor (VDR), negative temperature dependent resistor (NTC) positive temperature dependent resistor (PTC) characteristics of temperature, voltage and light dependent resistors and typical applications of each power ratings of a resistor power loss (heat) occurring in a conductor resistance of a colour coded resistor from colour code tables and confirm the value by measurement measurement of resistance of a range of variable resistors under varying conditions of light, voltage and temperature conditions Ohm’s law, including: basic direct current (d.c.) single path circuit voltage and current levels in a basic d.c. single path circuit effects of an open circuit, a closed circuit and a short circuit on a basic d.c. single path relationship between voltage and current from measured values in a simple circuit determining voltage, current and resistance in a circuit given any two of these quantities graphical relationships of voltage, current and resistance relationship between voltage, current and resistance electrical power, including: relationship between force, power, work and energy power dissipated in circuit from voltage, current and resistance values power ratings of devices measurement of electrical power in a d.c. circuit effects of power rating of various resistors relevant electrical regulations and legislations relevant manufacturer specifications relevant safe work method statements (SWMS)/job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures series circuits, including: circuit diagram of a single source d.c. series circuit identification of the major components of a series circuit: power supply, loads, connecting leads and switch applications where series circuits are used in the electrotechnology industry characteristics of a series circuit - connection of loads, current path, voltage drops, power dissipation and effects of an open circuit in a series circuit the voltage, current and resistances or power dissipated from measured or given values of any two of these quantities relationship between voltage drops and resistance in a simple voltage divider network setting up and connecting a single-source series d.c. circuit measurement of resistance, voltage and current values in a single source series circuit effect of an open circuit on a series connected circuit sustainable energy principles and practices techniques to confirm that a circuit is isolated techniques to check if tools, equipment and testing devices are operating correctly and safely. |