Unit of competency Outline
Date retreived
23/07/2026 1:30 AM AWST
23/07/2026 1:30 AM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Diagnose and rectify low voltage electrical systems
Diagnose and rectify low voltage electrical systems
Unit of competency
National Code
MEM18030B
MEM18030B
State Code
W5575
W5575
TGA Status
Replaced
Replaced
DTWD Status
Transition (Replaced)
Transition (Replaced)
State Implementation and Classification
Approved Date
05/08/2014
Field of Education
031313 - Electrical Fitting, Electrical Mechanics
Original Release Date
05/08/2014
Nominal Hours
72
Description
This unit covers using test instruments, testing the battery, and assessing and rectify wiring faults.
Notes
Elements and Performance Criteria
1. Use test instruments
- 1.1. Electron theory, current, voltage and resistance principles are understood.
- 1.2. Appropriate test instruments are selected, used and maintained to determine current, voltage and resistance.
- 1.3. Electrical drawings and manufacturers' diagrams are correctly interpreted.
- 1.4. Series, parallel and series parallel circuits are correctly determined.
- 1.5. Basic electrical laws are understood and correctly applied.
- 1.6. AVR test instruments are correctly connected into circuits.
- 1.7. Meters are read to standard accuracy; and wave form and quantities are determined using general purpose oscilloscope.
- 1.8. Multipliers and shunts are correctly used and applied.
2. Test battery
- 2.1. Chemical battery operating principles are understood.
- 2.2. Electrolyte level is correctly determined and specific gravity readings temperature is corrected.
- 2.3. Dry charge preparation and recharging of batteries is carried out correctly.
- 2.4. Discharge testing is performed according to prescribed procedures.
- 2.5. Replacement batteries are correctly selected for application.
3. Assess and rectify wiring faults
- 3.1. Wiring faults are correctly isolated.
- 3.2. Replacement cables/wires are correctly sized.
- 3.3. Insulation quality is correctly determined.
- 3.4. Wiring looms are correctly made up for application and securely fixed.
- 3.5. Wiring terminations are stripped, fitted, prepared and made correctly.
- 3.6. Corrosion is removed, neutralised and appropriate protective coating is applied.
- 3.7. Relays, solenoids, contacts and circuits are correctly tested and repaired/replaced.
RANGE STATEMENT
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Test instruments
Multimeters, amp meters, circuit testers
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Test instruments
Multimeters, amp meters, circuit testers
EVIDENCE GUIDE
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to test and rectify low voltage electrical systems. Competency in this unit cannot be claimed until all prerequisites have been satisfied.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.
Context of and specific resources for assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with testing and rectifying low voltage electrical systems or other units requiring the exercise of the skills and knowledge covered by this unit.
Method of assessment
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.
Guidance information for assessment
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to test and rectify low voltage electrical systems. Competency in this unit cannot be claimed until all prerequisites have been satisfied.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.
Context of and specific resources for assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with testing and rectifying low voltage electrical systems or other units requiring the exercise of the skills and knowledge covered by this unit.
Method of assessment
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.
Guidance information for assessment
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| OAT32 | MEM27006 | Diagnose and rectify batteries, low voltage sensors and circuits | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| W245 | MEM40105 | Certificate IV in Engineering | Qualification |
| W247 | MEM50105 | Diploma of Engineering - Advanced Trade | Qualification |
| W237 | MEM30205 | Certificate III in Engineering - Mechanical Trade | Qualification |
| W234 | MEM20205 | Certificate II in Engineering - Production Technology | Qualification |
| W726 | LMT31909 | Certificate III in Engineering - TCF Mechanic | Qualification |
| J097 | HLT43612 | Certificate IV in Rehabilitation and Assistive Technology | Qualification |