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

KSEGA Electrical installation cable selection and coordination

Evidence shall show an understanding of selecting cables and ensuring coordination 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

T Performance requirements design and safety encompassing

harmful effects against which the design of an electrical installation must provide protection

performance standards of a correctly functioning electrical installation

supply characteristics that shall be considered when designing an electrical installation

acceptable methods for determining the maximum demand in consumers mains and submains

ASNZS requirements limiting voltage drop in an installation

reason for dividing electrical installations into circuits and the factors that shall determine their number and type

typical external factors that may damage an electrical installation and that shall be considered in the installation design

methods for protecting persons and livestock against direct and indirect contact with conductive parts and the typical application of each

acceptable methods of protection against the risks of ignition of flammable materials and injury by burns from the thermal effects of current in normal service

likely sources of unwanted voltages and the methods for dealing with this potential hazard

acceptable methods for protecting persons and livestock against injury and property against damage from the effects of over current

requirement for protection against fault current

requirement for protection against the harmful effects of faults between live parts of circuits supplied at different voltages

need for protection against injury from mechanical movement and how this may be achieved

features of fire rated construction and how the integrity of the fire rating can be maintained in relation to electrical installation

T Final subcircuit arrangements encompassing

factors that shall be considered in determining the number and type of circuits required for an installation

daily and seasonal demand for lighting power heating and other loads in a given installation

number and types of circuits required or a particular installation

current requirements for given final subcircuits

layoutschedule of circuits for given installations

T Factors affecting the suitability of wiring systems encompassing

wiring systems typically used with various construction methods and particular environments

installation conditions that may affect the currentcarrying capacity of cables

external influences that may affect the currentcarrying capacity andor may cause damage to the wiring system

ASNZS requirements for selecting wiring systems for a range of circuits installation conditions and construction methods into which the wiring system is to be installed Note Wiring systems include cable enclosures underground wiring aerial wiring catenary support emergency systems busbar trunking and earth sheath return

T Maximum demand on consumers mainssubmains encompassing

acceptable methods for determining the maximum demand on an installations consumers mains and submains

maximum demand for the consumers mains for given installations up to A per phase

maximum demand for given submains

T Cable selection based on current carrying capacity requirements encompassing

installation conditions for a range of wiring systems and applications

external influences that require the use of a derating factor

ASNZS requirements for coordination of cables and protection devices

ASNZS used to select conductor size based on the maximum current requirement for a given installation condition including any applicable derating factors

T Cable selection based on voltage drop requirements encompassing

ASNZS requirements for maximum voltage drop in an installation

relevant tables in ASNZS for unit values of voltage drop

calculation of the expected voltage drop in a given circuit

selecting cables to satisfy voltage drop requirements in addition to current carrying capacity requirements

T Cable selection based on fault loop impedance requirements encompassing

ASNZS requirements for maximum fault loop impedance in an installation

relevant tables in ASNZS to determine cable impedances

calculation of the expected fault loop impedance for a given circuit arrangement

selecting cables to satisfy fault loop impedance requirements in addition to current carrying capacity requirements and voltage drop requirements

T Selecting protection devices encompassing

acceptable methods of protection against indirect contact

ASNZS requirements for selecting methods and devices to protect against indirect contact for a range of installation types and conditions

coordination between conductors and protection devices to ensures the protection of cables from over heating due to over current

possible injuries to persons and livestock from hazards due to a short circuit

ASNZS requirements for selecting devices to protect against overload current for a range of circuits and loads

ASNZS requirements for selecting devices to protect against shortcircuit current for a range of installation conditions

T Selecting devices for isolation and switching encompassing

requirements for the provision of the isolation of every circuit in an electrical installation

need for protection against mechanical movement of electrically activated equipment

ASNZS requirements for selecting devices for isolation and switching for a range of installations and conditions

T Switchboards encompassing

ASNZS and local supply authority requirements for switchboards

tariff structures for the supply of electricity

equipment installed at the main switchboards with capacities up to A per phase

layout of a main switchboard for an installation supplied with single phase single tariff whole current metering

layout of a main switchboard for an installation supplied with single phase multiple tariff whole current metering

layout of a main switchboard for an installation supplied with multiphase single tariff whole current metering

layout of a main switchboard for an installation supplied with multiphase multiple tariff whole current metering

layout of a main switchboard for a multiple tenancy installation with whole current metering

layout of a main switchboard including metering for an installation supplied with three phase CT metering

local supply authority requirements for connection of an electrical installation to the electrical supply system

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

Overview of Assessment

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 Industrys 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 substancematerial 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

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites shall be met

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 UEE Evidence shall also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Selecting wiring systems and cables for general electrical installations as described as in and including

A

Determining the extent and nature of the installation for job specifications

B

Obtaining and understand the safety and other regulatory requirements to which the electrical installation shall comply

C

Determining cable routes the route lengths of cables and the conditions in which the wiring system is to operate

D

Selecting wiring system suitable for the environment requirements

E

Selecting cable conductors sizes in consideration to currentcarrying capacity and voltagedrop earth faultloop limitation

F

Ensuring coordination between circuit protective device and conductor currentcarrying capacity

G

Selecting compliant earthing system components

H

Documenting wiring systems and cables to be used specification for items selected and reasons for the selections made

I

Dealing with unplanned events

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment 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

The resources used for assessment should reflect current industry practices in relation to selecting and arranging equipment for general electrical installations

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note Competent performance with inherent safe working practices is expected in the industry to which this unit applies This requires assessment in a structured environment which is primarily intended for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Note:
Competent performance with inherent safe working practices is expected in the industry to which this unit applies. This requires assessment in a structured environment which is primarily intended for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

For optimisation of training and assessment effort competency development in this unit may be arranged concurrently with unit

UEENEEA

UEENEE063A

Arrange circuits control and protection for general electrical installations