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Elements and Performance Criteria

  1. Plan to make up and assemble bus bars
  2. Hazards are identified, risks assessed and control measures implemented
  3. Work instructions, including layout and wiring diagrams, are obtained and applied
  4. Advice is sought from supervisor to ensure work is coordinated effectively with others
  5. Materials required for the work are obtained in accordance with workplace procedures
  6. Tools, equipment and testing devices required for the work are obtained and checked for correct operation and safety in accordance with workplace procedures
  7. Make up and assemble bus bars
  8. Circuits are checked and isolated in accordance with WHS/OHS requirements and workplace procedures
  9. Bus bars are formed/made up in accordance with work instructions, industry standards, manufacturer specifications and workplace procedures
  10. Bus bars are connected in accordance with work instructions, industry standards, manufacturer specifications and workplace procedures
  11. Quality checks are carried out in accordance with workplace procedures
  12. Completed bus bar assembly is inspected and tested in accordance with workplace procedures, industry standards and manufacturer specifications
  13. Unplanned events are referred to supervisor for directions in accordance with workplace procedures
  14. Work is carried out without waste of materials or damage to apparatus, the surrounding environment or services using sustainable energy practices
  15. Check quality of assembled bus bars
  16. Assembled bus bars are checked against work instructions, industry standards and manufacturer specifications in accordance workplace procedures
  17. Problem-solving techniques are used where corrective actions to assembled components are required in accordance with regulatory requirements and industry standards
  18. Work report forms are completed accurately and relevant person/s notified in accordance with workplace procedures

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 two separate occasions and include:

applying problem-solving techniques when determining the nature of a fault

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including:

using risk control measures

checking tools, equipment and testing devices for correct operation and safety

applying sustainable energy principles and practices

checking quality and installation of assembled bus bars

communicating effectively with relevant stakeholders

completing workplace documentation

dealing with unplanned events in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

following work instructions

interpreting electrical layout and wiring diagrams

inspecting and testing installed bus bars

making up and assembling electrical bus bars, including:

following assembly instructions

forming and making up correctly

terminating bus bars correctly

adhering to quality procedures

checking circuits are isolated

making interconnections

considering designs

connecting bus bars correctly

performing regular quality checks.


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:

chemical and metallurgical properties of bus bars, including:

copper (Cu)

aluminium (Al)

copper clad aluminium

hard drawn copper

annealing

types of high conductivity copper

current-carrying capacity, including:

standard cross-sections of bar

current ratings

temperature rise

design considerations, including:

electrical and thermal resistance

mechanical strength in tension, compression and shear

resistance to fatigue failure

electrical resistance of surface films

ease of fabrication

resistance to corrosion

first cost and high eventual recovery value

choice of bus bar materials

creep properties

fatigue properties

self-extinguishing arcs in Cu and Al

insulated bus bar

provision for bus bar expansion

effects of short circuit, including:

temperature rise

electromagnetic stresses

cleats and structural supports

electrical bus bar types, including:

main bus bars

intermediate bus bars

cell bus bars

droppers

flexible joints

hanger bars

short circuit frames

jointing types and techniques, including:

clamped joints

bolted

riveted

welded

soldered or brazed

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures

shaping and bending equipment and techniques, including:

hand and power tools

hydraulic shears

hydraulic punches

hydraulic notcher

machines allowing multiple operations

stand-off insulators, including:

form

function

physical and electrical properties/characteristics

selection.