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Elements and Performance Criteria

1. Prepare to design switchboards
   • Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified, obtained and applied
2. Scope of the switchboard is identified from design brief
3. Switchboard safety and regulatory requirements are identified, obtained and applied
4. Design development work is planned in consultation with relevant person/s involved with the work to meet scheduled timelines
5. Develop switchboard design
   • Relevant performance standards, compliance methods and electrical equipment are applied to switchboard design in accordance with relevant industry standards
6. Alternative switchboard design/s is developed in accordance with the design brief
7. Safety, functional and budgetary considerations are incorporated in switchboard design
8. Switchboard design draft is checked in accordance with design brief and relevant industry standards
9. Switchboard design is documented for submission to relevant person/s for acceptance and approval
10. Unplanned situations are dealt with in accordance with workplace procedures
11. Obtain approval for installation design
    • Switchboard design is documented and presented to client representative and/or relevant person/s
12. Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures
13. Final design is documented and approval obtained from relevant person/s
14. Quality of work is monitored in accordance with workplace procedures and relevant industry standards

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.
Designing a > (greater than) 400 A three phase, 20 kilowatt (kw) fault level switchboard must include at least the following:	control for essential and general supply metering sub-main controls local final sub-circuit distribution board fault indicators

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

developing outlines of alternative designs developing the design within the safety and functional requirements and budget limitations documenting and presenting design effectively successfully negotiating design alteration requests obtaining approval for final design dealing with unplanned events applying performance standards, compliance methods and electrical equipment to switchboard design applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures consulting with relevant person/s in planning design work identifying scope of switchboard design brief monitoring quality of work planning to meet scheduled timelines preparing to design switchboards.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

switchboard design of low voltage (LV) switchboards rated for high fault currents, including: trade calculations encompassing: mathematical techniques relevant calculations linear measurement, areas, volumes and ratios engineering mechanics encompassing: base physical quantities concepts, principles, International System of Units (SI) units, their applications in engineering calculations in relation to physical quantities and associated formulae mass, velocity, acceleration, force, weight, density and angles energy/work/power moments/torque centre of gravity mechanical advantage levers pulley blocks efficiency friction vectors resolution of forces forces in strung conductors forces on poles and towers determination of sag pressure/stress elementary fluid mechanics engineering materials encompassing: classification ferrous and non-ferrous metals steels and alloys properties tensile strength temperature and expansion in metals stress and strain ductility applications corrosion galvanic corrosion hardwoods and soft woods fault current calculations encompassing: calculation of fault currents calculation/determination of positive, negative and zero sequence impedances determination of fault current breaking and let-through energy capacities of protection devices the influence of fault/arc impedances impedances operative for phase-to-phase and phase-to-earth faults calculation of fault currents for phase-to-phase and phase-to-earth faults approximation calculations by selecting the components with the major impedance problem-solving techniques relevant manufacturer specifications and operating instructions relevant job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace quality, instructions, policies and procedures.

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