Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MEM10019 Mapping and Delivery Guide
Select circuit protection devices by type and rating, fit to switchboards and install earthing

Version 1.0
Issue Date: April 2024


Qualification -
Unit of Competency MEM10019 - Select circuit protection devices by type and rating, fit to switchboards and install earthing
Description
Employability Skills
Learning Outcomes and Application This unit of competency has been developed for Engineering Tradesperson –industrial electrician apprenticeship training and the recognition of trade-level skills in selecting and installing circuit protection devices to protect against electric shock, over current and over voltage for operating voltages up to 1000 V alternating current (AC) or 1500 V direct current (DC) and install earthing as per multiple earthed neutral (MEN) system. It covers a comprehensive understanding of earthing arrangements, the MEN system (including sub-installations), the calculation and selection of protective devices, alternative arrangement against electric shock and the requirements for use of residual current devices (RCDs).This unit covers the skills and knowledge required to meet the Electrical Regulatory Authorities Council (ERAC).Essential Performance Capabilities (EPCs) classified as ‘critical’: EPC 16 – Demonstrate and apply in practice the requirements of AS/NZS 3000 in relation to earthing arrangements and fault-loop impedance calculations. Knowledge of alternate earthing systems when required by local Regulatory Authorities. EPC 17 – Demonstrate a comprehensive knowledge and understanding of the MEN system and its application, including on sub-installations. Demonstrate how to test an MEN system.EPC 27 – Describe and apply in practice the requirements for circuit protection using AS/NZS 3000:2000 and other relevant Australian Standards, e.g. AS/NZS 3018.1.EPC 20 – Demonstrate knowledge of the SELV and PELV systems, their application and testing in accordance with AS/NZS 3000.EPC 23 – Describe and apply the control and protection requirements for installations and equipment. Demonstrate the ability to select suitable equipment and switchgear for a particular installation or part of an installation using AS/NZS 3000.EPC 24 – Demonstrate an understanding of the AS/NZS 3000 and regulatory requirements for the location of switchboards and the arrangement of switchboard equipment in installations. Methods for determining prospective fault current. Switchboard form types.EPC 26 – Demonstrate the appropriate methods for the installation, modification and testing of electrical installations and equipment for construction and demolition sites, complying with AS/NZS 3012 and applicable workplace safety legislation. Need for calibration of instruments.Some jurisdictions require the holder of this unit to be licensed or certified and users should check with the relevant authorities.Band: AUnit Weight: 2
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Assessors must:

have vocational competency in selecting circuit protection devices by type and rating, fitting to switchboards and installing earthing at least to the level being assessed with relevant industry knowledge and experience

satisfy the assessor requirements in the Standards for Registered Training Organisations 2015 and comply with the National Vocational Education and Training Regulator Act 2011 or equivalent legislation covering VET regulation in a non-referring State as the case requires.

Where possible assessment must occur in operational workplace situations. Where this is not possible or where personal safety or environmental damage are limiting factors, assessment must occur in a sufficiently rigorous simulated environment that reflects realistic operational workplace condition. This must cover all aspects of workplace performance, including environment, task skills, task management skills, contingency management skills and job role environment skills.

Conditions for assessment must include access to all tools, equipment, materials and documentation required, including relevant workplace procedures, product and manufacturing specifications.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.
Prerequisites/co-requisites
Competency Field Installation and commissioning
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Determine job requirements
  • Follow standard operating procedures (SOPs)
  • Comply with work health and safety (WHS) requirements at all times, including appropriate risk control measures
  • Use appropriate personal protective equipment (PPE) in accordance with SOPs
  • Identify job and load requirements from specifications, drawings, job sheets or work instructions
       
Element: Prepare and select circuit protection controls and devices for electrical installations
  • Organise circuits and switchboard equipment to comply with layout drawings, specifications and regulatory requirements
  • Select suitable circuit protective devices to meet specifications
  • Select RCDs to meet required circuit requirements and specifications
  • Select switchgear/control gear by type, rating and purpose for a particular installation or part of an installation
       
Element: Install circuit protection controls and devices for electrical installations
  • Isolate and tag circuits and equipment in accordance with procedures, where required
  • Install circuit protection devices in compliance with job specifications and requirements
  • Install RCDs, where required, to protect all lighting and socket outlets in final subcircuits in domestic electrical installations
  • Install switchgear (including main switch/s) and control gear according to manufacturer and regulatory requirements
  • Check installed components are straight and square in the required locations and within acceptable tolerances
  • Terminate earthing to meet with the MEN system requirements
  • Inspect installed components and earthing system visually to ensure compliance
  • Test the earthing system for continuity and insulation resistance to ensure compliance
  • Mark all switches, circuit-breakers, RCDs and other electrical equipment on or adjacent to the switchboard
  • Document selection of circuit protection devices and electrical installation arrangement in accordance with SOPs
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1.

Determine job requirements

1.1.

Follow standard operating procedures (SOPs)

1.2.

Comply with work health and safety (WHS) requirements at all times, including appropriate risk control measures

1.3.

Use appropriate personal protective equipment (PPE) in accordance with SOPs

1.4.

Identify job and load requirements from specifications, drawings, job sheets or work instructions

2.

Prepare and select circuit protection controls and devices for electrical installations

2.1.

Organise circuits and switchboard equipment to comply with layout drawings, specifications and regulatory requirements

2.2.

Select suitable circuit protective devices to meet specifications

2.3.

Select RCDs to meet required circuit requirements and specifications

2.4.

Select switchgear/control gear by type, rating and purpose for a particular installation or part of an installation

3.

Install circuit protection controls and devices for electrical installations

3.1.

Isolate and tag circuits and equipment in accordance with procedures, where required

3.2.

Install circuit protection devices in compliance with job specifications and requirements

3.3.

Install RCDs, where required, to protect all lighting and socket outlets in final subcircuits in domestic electrical installations

3.4.

Install switchgear (including main switch/s) and control gear according to manufacturer and regulatory requirements

3.5.

Check installed components are straight and square in the required locations and within acceptable tolerances

3.6.

Terminate earthing to meet with the MEN system requirements

3.7.

Inspect installed components and earthing system visually to ensure compliance

3.8.

Test the earthing system for continuity and insulation resistance to ensure compliance

3.9.

Mark all switches, circuit-breakers, RCDs and other electrical equipment on or adjacent to the switchboard

3.10.

Document selection of circuit protection devices and electrical installation arrangement in accordance with SOPs

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria on at least two (2) occasions and include:

following work instructions, standard operating procedures (SOPs) and safe work practices

identifying and interpreting circuits, drawings, plans and specifications relevant to the work to be undertaken

determining the individual load requirements of the installation

selecting the appropriate switchboard and layout arrangements

complying with Australian/New Zealand Wiring Rules, other Australian Standards, e.g. AS/NZS 3008.1.1:2009 Electrical Installations – Selection of cables – Cables for alternating voltages up to and including 0.6/1 kV – typical Australian installation conditions, Service Rules and other relevant standards when selecting circuit protection controls and devices in regard to the following aspects:

protection against indirect contact, overcurrent or excess earth leakage current conditions and over and under voltage by selecting and installing using safe working practices:

a fuse/s for fault current limiting protection

an appropriate circuit breaker/s with a current rating not less than the maximum demand of the portion of the electrical installation they control

a residual current device (RCD) with a maximum rated residual current of 30 mA

control of the electrical installation (or parts thereof) by suitable switching arrangements by selecting and installing using safe working practices:

a main switch/es to control the whole of the electrical installation

switches for isolation, emergency, mechanical maintenance and functional (control) with appropriate Ingress Protection (IP) rating

installing and terminating the compliant earthing system components for the multiple earthed neutral (MEN) system and other earthing arrangements

terminating all circuit protection controls and devices

inspect visually all components and earthing system to ensure compliance

test earthing system for continuity and insulation resistance

identify with marking all switches, circuit breakers and RCDs and other electrical equipment on or adjacent to the switchboard

using test equipment to locate faults, completing remedial action and retesting to ensure compliance

documenting reasons for selection and installation arrangement requirements in accordance with SOPs.

Evidence required to demonstrate the required knowledge for this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include knowledge of:

safe work practices and procedures and use of personal protective equipment (PPE)

Australian/New Zealand Wiring Rules and other related standards in regards to the following:

requirements for the selection and installation of switchgear and controlgear, including:

protection against indirect contact

protection against over current or excess earth leakage current conditions

protection against over voltage and under voltage

control of the electrical installation (or parts thereof) by suitable switching arrangements

design, selection (including form type) and installation of switchboards

design of an electrical installation

design, selection (including form type) and installation of switchboards

application and segregation requirements of separated extra-low voltage (SELV) and protected extra-low voltage (PELV) circuits, including earthing requirements and testing

application and arrangement of an isolated supply

hazards and risks in an electrical installation

protection against indirect contact, including:

methods of protection

protection by automatic disconnection of supply

touch-voltage limits

earthing system impedance

disconnection times

supplementary equipotential bonding

protection by the use of Class II equipment or by equivalent insulation

protection by electrical separation

protection by the use of RCDs

protection against thermal effects in normal service

protection against unwanted voltages

protection against over current and fault currents

protection against over voltage

protection against injury from mechanical movement

devices for isolation

fire integrity

protection from damp situations

earthing system terms, parts and arrangement

devices and operating principles for automatic disconnection of supply, including circuit breakers, fuse and RCDs

devices for isolation and switching, including for the following functions:

isolation

emergency

mechanical maintenance

functional (control)

switchboards and distribution boards purpose, types, application, layout and compliance requirements

bonding of metallic meter enclosures

minimum fault levels specified by electricity network operator

methods for determining prospective fault current

MEN arrangement, resultant fault current path and magnitude, operation of protective devices and implication of MEN link absence during fault conditions

knowledge of alternate earthing systems when required by local Regulatory Authorities, e.g. TT low voltage supply earthing system in dairy sheds in New Zealand

construction and demolition requirements as per AS/NZS 3012:2010 Electrical Installations – Construction and demolition sites.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1.

Determine job requirements

1.1.

Follow standard operating procedures (SOPs)

1.2.

Comply with work health and safety (WHS) requirements at all times, including appropriate risk control measures

1.3.

Use appropriate personal protective equipment (PPE) in accordance with SOPs

1.4.

Identify job and load requirements from specifications, drawings, job sheets or work instructions

2.

Prepare and select circuit protection controls and devices for electrical installations

2.1.

Organise circuits and switchboard equipment to comply with layout drawings, specifications and regulatory requirements

2.2.

Select suitable circuit protective devices to meet specifications

2.3.

Select RCDs to meet required circuit requirements and specifications

2.4.

Select switchgear/control gear by type, rating and purpose for a particular installation or part of an installation

3.

Install circuit protection controls and devices for electrical installations

3.1.

Isolate and tag circuits and equipment in accordance with procedures, where required

3.2.

Install circuit protection devices in compliance with job specifications and requirements

3.3.

Install RCDs, where required, to protect all lighting and socket outlets in final subcircuits in domestic electrical installations

3.4.

Install switchgear (including main switch/s) and control gear according to manufacturer and regulatory requirements

3.5.

Check installed components are straight and square in the required locations and within acceptable tolerances

3.6.

Terminate earthing to meet with the MEN system requirements

3.7.

Inspect installed components and earthing system visually to ensure compliance

3.8.

Test the earthing system for continuity and insulation resistance to ensure compliance

3.9.

Mark all switches, circuit-breakers, RCDs and other electrical equipment on or adjacent to the switchboard

3.10.

Document selection of circuit protection devices and electrical installation arrangement in accordance with SOPs

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Installations include:

at least one (1) general electrical installation comprising a main switchboard, supplying more than one circuit each for lighting, socket outlets and fixed appliances

at least one (1) industrial electrical installation comprising a distribution board separate from the main switchboard and at least one (1) circuit supplying a three-phase load and safety system in one of the following industrial environments:

factory

building

off shore platform

mine site processing

oil and gas installation

processing plant

workshop

underground installation

three-phase loads include at least one (1) or more of the following:

motors – for pumps, conveyors, mills, agitators, crushers and screening plants

heaters

compressor packages

heating, ventilation and air conditioning (HVAC) units

facility accommodation units, sea container workshops and storage units, and laboratories

workshop equipment, including lathes, milling machines and welders

underground dewatering systems and ‘gate end’ boxes for drilling equipment

Regulatory requirements include:

AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)

AS/NZS 3012:2010 Electrical installations – Construction and demolition sites

Safe working practices include:

demonstration of safe working practices and installation in accordance with industry established safe and sound practices

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Follow standard operating procedures (SOPs) 
Comply with work health and safety (WHS) requirements at all times, including appropriate risk control measures 
Use appropriate personal protective equipment (PPE) in accordance with SOPs 
Identify job and load requirements from specifications, drawings, job sheets or work instructions 
Organise circuits and switchboard equipment to comply with layout drawings, specifications and regulatory requirements 
Select suitable circuit protective devices to meet specifications 
Select RCDs to meet required circuit requirements and specifications 
Select switchgear/control gear by type, rating and purpose for a particular installation or part of an installation 
Isolate and tag circuits and equipment in accordance with procedures, where required 
Install circuit protection devices in compliance with job specifications and requirements 
Install RCDs, where required, to protect all lighting and socket outlets in final subcircuits in domestic electrical installations 
Install switchgear (including main switch/s) and control gear according to manufacturer and regulatory requirements 
Check installed components are straight and square in the required locations and within acceptable tolerances 
Terminate earthing to meet with the MEN system requirements 
Inspect installed components and earthing system visually to ensure compliance 
Test the earthing system for continuity and insulation resistance to ensure compliance 
Mark all switches, circuit-breakers, RCDs and other electrical equipment on or adjacent to the switchboard 
Document selection of circuit protection devices and electrical installation arrangement in accordance with SOPs 

Forms

Assessment Cover Sheet

MEM10019 - Select circuit protection devices by type and rating, fit to switchboards and install earthing
Assessment task 1: [title]

Student name:

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I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

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Assessor name:

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Assessment Record Sheet

MEM10019 - Select circuit protection devices by type and rating, fit to switchboards and install earthing

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

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