Modification History
Not Applicable
Unit Descriptor
Unit Descriptor |
1 ) 1 .1 ) Descriptor |
This unit covers selecting wiring systems and cables for electrical installations operating at voltages up to 1,000V a.c. or 1,500 V d.c. It encompass knowledge and application of wiring systems and cable types, selecting wiring system compatible with the installation conditions, selecting cables that comply with required current-carrying capacity and voltage drop and earth fault-loop impedance limitations, coordination between protective devices and conductors and documenting selection decisions |
Application of the Unit
Not Applicable
Licensing/Regulatory Information
1 .2 ) License to practice |
The application of the skills and knowledge described in this unit require a license to practice in the workplace where work is carried out on electrical equipment or installations which are designed to operate at voltages greater than 50 V a.c. or 120 V d.c. Practice in workplace and during training is also subject to regulations directly related to occupational health and safety and where applicable contracts of training such as apprenticeships. Note: |
Pre-Requisites
Prerequisite Unit (s ) |
2 ) |
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2 .1 ) Competencies |
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Granting competency in this unit shall be made only after competency in the following unit(s) has/have been confirmed. |
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UEENEEE101A |
Apply Occupational Health and Safety regulations, codes and practices in the workplace |
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UEENEEE102A |
Fabricate, dismantle, assemble of electrotechnology components |
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UEENEEE104A |
Solve problems in d.c circuits |
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UEENEEE105A |
Fix and secure electrotechnology equipment |
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UEENEEE107A |
Use drawings, diagrams, schedules, standards, codes and specifications |
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UEENEEG006A |
Solve problems in single and three phase low voltage machines |
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UEENEEG033A |
Solve problems in single and three phase electrical apparatus and circuits |
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UEENEEG063A |
Arrange circuits, control and protection for general electrical installations |
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UEENEEG101A |
Solve problems in electromagnetic devices and related circuits |
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UEENEEG102A |
Solve problems in low voltage a.c. circuit |
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UEENEEG106A |
Terminate cables, cords and accessories for low voltage circuits |
Employability Skills Information
Employability Skills |
3 ) This unit contains Employability Skills The required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements. |
Application of the Unit |
4 ) |
4 .1 ) General Application This unit applies to competency development entry-level employment based programs incorporated in approved contracts of training. 4 .2 ) Importation RTOs wishing to import this unit into any qualification under the flexibility provisions of NQC Training Package Policy |
Elements and Performance Criteria Pre-Content
6 ) Elements describe the essential outcomes of a unit of competency |
Performance criteria describe the required performance needed to demonstrate achievement of the Element. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
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1 |
Prepare to select wiring systems and cables for general electrical installations |
1.1 |
The extent and nature of the electrical installation is determined from job specifications. |
1.2 |
Safety and other regulatory requirements to which the electrical installation shall comply area are identified, obtained and understood. |
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1.3 |
Cable routes, the route lengths of cables and the conditions in which the wiring system is to operate is determined from job specifications or from consultation with appropriate persons. |
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2 |
Select wiring systems and cables for general electrical installations |
2.1 |
Wiring systems are selected for suitability for the environments in which they are to operate. |
2.2 |
Cable conductor sizes are selected to meet current-carrying capacity requirements and voltage-drop and earth fault-loop impedance limitations. |
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2.3 |
Circuit protective devices are selected to meet requirement for co-ordination with conductor current-carrying capacity. |
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2.4 |
Earthing system components are selected to meet requirements of an MEN system. |
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2.5 |
Evidence is obtained that electrical equipment selected complies with safety requirements. |
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3 |
Document electrical installation. |
3.1 |
Evidence is obtained from manufacturers/suppliers that electrical equipment selected complies with safety requirements. |
3.2 |
Reasons for selections made, including calculations, are documented in accordance with established procedures. |
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3.3 |
Electrical installation arrangement and specifications for all selected items are documented in accordance with established procedures and forwarded to appropriate person(s). |
Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
7) This describes the essential skills and knowledge and their level, required for this unit. |
Evidence shall show that knowledge has been acquired of selecting wiring systems and cables for general electrical installations. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EG107A Electrical installation — cable selection and co-ordination Evidence shall show an understanding of selecting cables and ensuring co-ordination between protection device and conductors in electrical installations that comply with the Wiring Rules, Selection of cables standards and Service Rules to an extent indicated by the following aspects: T1 Performance requirements - design and safety encompassing:
T2 Final subcircuit arrangements encompassing:
T3 Factors affecting the suitability of wiring systems encompassing:
T4 Maximum demand on consumer’s mains/submains encompassing:
T5 Cable selection based on current carrying capacity requirements encompassing:
T6 Cable selection based on voltage drop requirements encompassing:
T7 Cable selection based on fault loop impedance requirements encompassing:
T8 Selecting protection devices encompassing:
T9 Selecting devices for isolation and switching encompassing:
T10 Switchboards encompassing:
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Evidence Guide
EVIDENCE GUIDE |
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9 ) The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package. The Evidence Guide forms an integral part of this unit. It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package. |
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Overview of Assessment |
9 .1 ) Longitudinal competency development approaches to assessment, such as Profiling, require data to be reliably gathered in a form that can be consistently interpreted over time. This approach is best utilised in Apprenticeship programs and reduces assessment intervention. It is the Industry's preferred model for apprenticeships. However, where summative (or final) assessment is used it is to include the application of the competency in the normal work environment or, at a minimum, the application of the competency in a realistically simulated work environment. It is recognised that, in some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accordance with industry and regulatory policy. Methods chosen for a particular assessment will be influenced by various factors. These include the extent of the assessment, the most effective locations for the assessment activities to take place, access to physical resources, additional safety measures that may be required and the critical nature of the competencies being assessed. The critical safety nature of working with electricity, electrical equipment, gas or any other hazardous substance/material carries risk in deeming a person competent. Sources of evidence need to be 'rich' in nature to minimise error in judgment. Activities associated with normal every day work have a bearing on the decision as to how much and how detailed the data gathered will contribute to its 'richness'. Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised. These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments. Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package. |
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Critical aspects of evidence required to demonstrate competency in this unit |
9 .2 ) Before the critical aspects of evidence are considered all prerequisites shall be met. |
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Evidence for competence in this unit shall be considered holistically. Each element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07'. Evidence shall also comprise:
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A |
Determining the extent and nature of the installation for job specifications |
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B |
Obtaining and understand the safety and other regulatory requirements to which the electrical installation shall comply |
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C |
Determining cable routes, the route lengths of cables and the conditions in which the wiring system is to operate. |
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D |
Selecting wiring system suitable for the environment requirements. |
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E |
Selecting cable conductors sizes in consideration to current-carrying capacity and voltage-drop / earth fault-loop limitation. |
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F |
Ensuring co-ordination between circuit protective device and conductor current-carrying capacity. |
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G |
Selecting compliant earthing system components |
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H |
Documenting wiring systems and cables to be used, specification for items selected and reasons for the selections made. |
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I |
Dealing with unplanned events |
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Context of and specific resources for assessment |
9 .3 ) This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:
These should be part of the formal learning/assessment environment. Note: Where simulation is considered a suitable strategy for assessment, conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy. |
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The resources used for assessment should reflect current industry practices in relation to selecting and arranging equipment for general electrical installations. |
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Method of assessment |
9 .4 ) This unit shall be assessed by methods given in Volume 1, Part 3 'Assessment Guidelines'. Note: |
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Concurrent assessment and relationship with other units |
9 .5 ) |
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For optimisation of training and assessment effort, competency development in this unit may be arranged concurrently with unit: |
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UEENEE063A |
Arrange circuits, control and protection for general electrical installations |
Range Statement
RANGE STATEMENT |
8 ) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance. |
This unit shall be demonstrated in relation to selecting and selecting wiring systems and cables for at least two general electrical installations comprising a main switchboard, supplying more than one circuit each for, lighting, socket outlets, and fixed appliances. One of the installations shall include a distribution board separate from the main switchboard and at least one circuit supplying a three-phase load and a fire pump. |
Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1. |
Unit Sector(s)
Not Applicable
Competency Field
2 .2 ) Literacy and numeracy skills Participants are best equipped to achieve competency in this unit if they have reading, writing and numeracy skills indicated by the following scales. Description of each scale is given in Volume 2, Part 3 'Literacy and Numeracy' |
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Reading |
5 |
Writing |
5 |
Numeracy |
5 |
Custom Content Section
Competency Field |
5 ) |
Electrical |