Reference no: EM132952485

UEENEEG105A Verify compliance and functionality of low voltage general electrical installations

KS01-EG105A Electrical installations - verification and testing

1. Electrical safety:
a. There are a range of safety procedures that must be carried out when working on electrical systems and apparatus. Identify at least 10.
b. Outline the safe working practices that should be conducted as a normal part of carrying out all electrical installation work.
c. Outline an isolation and lockout procedure.
d. Identify at least 8 of the types of tools and equipment that are commonly needed to conduct electrical installation compliance inspection and testing.

2. Legislated regulations:
a. Outline the electrical safety requirements that require installation and equipment to be inspected and tested to ensure they are safe.
b. What are 4 of the other acts and regulations that may be relevant to the installation of the electrical equipment?
c. Who are the persons and/or bodies that are responsible for the various aspects of ensuring that electrical installations are safe on a worksite?
d. What are the types of results of tests that may show that an electrical installation is safe for connection to the supply? Identify at least 6.
e. What are 4 of the types of results from periodic inspection and tests that show construction site wiring and equipment is safe to use?
f. What are the types of results that must be achieved when carrying out periodic inspection and tests that show electrical equipment are safe to use?

3. Visual inspection of installations for compliance with the Wiring Rules:
a. What are the protection requirements that must be assessed using a comprehensive checklist when conducting a visual inspection?
b. What should be considered when visually assessing the general condition of an installation?
c. What are the aspects of the consumer mains and submains that will need to be visually assessed using a comprehensive checklist?
d. Identify the aspects of the switchboards should be visually inspected using a comprehensive checklist.
e. List the aspects of wiring systems should be visually inspected.
f. What are the aspects of equipment and accessories that should be inspected visually?
g. What are the 4 aspects of earthing systems that need to be visually inspected?

4. Testing installations:
a. How can you test that the insulation resistance is adequate?
b. What can you do to ensure that earth continuity is sufficient to ensure that the protection devices will operate under fault conditions?
c. Briefly discuss the polarity of active/s and neutral for mains
d. How can you ensure that submains and final subcircuits are correct?
e. How can you ensure that there is no transposition of earthing and neutral conductors?
f. When testing RCD's for correct operation and sensitivity, what will it be necessary to do?
g. What are 5 of the types of functional tests that can be completed to ensure active/s and neutral for the same circuit are clearly identified with their circuit protection device?
h. What are the tests that can show that all circuits and devices operate as intended?
i. There are a range of tests that can be used to determine the fault level at a particular point in an installation. Identify 3.

5. Documentation:
a. What information should be included in the range of documented results that required by supply authorities?
b. What will need to be included in the range of documents that must be maintained for the inspection and testing of construction site wiring and equipment?
c. What are 6 of the documentation that must be kept for electrical inspections, tagging and testing?

6. Effects of electric current:
a. What are the physiological effects of current on the human body?
b. Briefly discuss each of the following which an electric current can produce:
i. Heat.
ii. Light.
iii. Motion.
iv. A chemical reaction.

7. Single path practical circuit:
a. Outline the arrangement of an energy source, a protection device, a switch and a load in a circuit.
b. Identify and describe the purpose of each component in a single path practical circuit.
c. What are the consequences of an open-circuit?
d. What are the consequences of closed-circuits?
e. What are the consequences of short-circuits?

8. Single-source multiple-path D.C. circuits:
a. Briefly discuss the circuit configurations and connection of single-source multiple-path D.C. circuits.
b. What is the relationship between the parameters of voltage, current, resistance and power dissipation in the whole or in any part of the circuit?
c. What is it necessary to ensure when measuring the parameters safely for the whole or any part of the circuit?
d. What are 3 methods that could be used to determine circuit behaviour for variation in any of the parameters from measured and calculated values?

9. Alternating voltage and current generation, phase relationships, energy in an A.C. circuit:
a. Discuss sinusoidal voltage generation and the resulting current.
b. Define the following terms:
i. Period.
ii. Maximum value.
iii. Peak-to-peak value.
iv. Instantaneous value.
v. Average value.
vi. Root-mean-square (R.M.S.) value
vii. Frequency.
c. What is three-phases generation?
d. Discuss the relationship between the phase voltages generated in a three-phase alternator and the conventions for identifying each?
e. What method can be used to determine the phase sequence or phase rotation of a three-phase supply?
f. What methods can be used to determine the power and energy supplied by three phase circuits?

10. Fundamental safety principles of the AS/NZS 3000 Part 1 (Section 1) and deemed to comply solution given in Part 2:
a. How are the range of definitions set out within the AS 3000 Wiring Rules?
b. What are the fundamental principles given in Part 1 - Section 1 of the Wiring Rules that will need to be followed? Identify all 9.
c. What are the various sections that the deemed compliant requirements given in section 2 - 8 will be included in?
d. What are the range of requirements that must be complied with for the installation design and selection of equipment?
e. Briefly discuss the means and verification of compliance.

11. Electric motor selection, starting method and overload protection:
a. Identify and discuss at least 3 types of motor enclosures that are suitable for given environmental conditions.
b. What criteria should be considered when selecting motor starters and overload protection?
c. What are 5 types of common direct-on-line and reduced voltage starters?
d. Outline the operating principle of a direct-on-line starter.
e. Briefly describe thermal overload protection methods.
f. Outline the operating principles of thermal and magnetic circuit breakers.
g. How can magnetic protection be used on circuits?

12. Ability to apply AS/NZ 3000 requirements for protective and functional earthing:
a. What is the purpose of protective earthing?
b. What is the purpose of functional earthing?
c. Identify the 4 main parts of a protective earthing system.
d. What are the range of conditions that protective earthing conductors must comply with in terms of arrangement in order to be compliant with the wiring rules?
e. What are the requirement that the earthing of equipment must be compliant with?
f. Briefly outline the requirements for equipotential bonding.
g. What information needs to be considered when selecting the protective conductor and the active conductor sizes for each circuit?

13. MEN system and its application:
a. Discuss the roles of the following components of the MEN system: protective earthing (PE) and neutral (N) conductors.
b. What is the role of the relationship between protective earthing and neutral conductors to the PEN conductor in the electricity distributors system or sub-main to an outbuilding?
c. What is the importance of the MEN link when a fault occurs?
d. What is the likely consequence of the absence of the MEN link or high impendence in the PEN conductor when a fault occurs?
e. What are the requirements that must be met for the installation of an MEN link in an installation and an outbuilding?

14. Knowledge of the application of transformers:
a. Briefly discuss the transformers that are used in distribution and transmission systems and large consumer installations.
b. What are the characteristics of transformers used in welding machines?
c. There are a range of different transformer applications that are used in appliances. Identify 6.
d. What types of risks may be present that are associated with the connection and disconnection of instrument transformers?
e. What safety control measures that can be implemented to control the risks identified?
f. What is it necessary to ensure for safety when connecting and testing transformers?
g. What are the AS/NZS 3000 requirements and restrictions for the installation and use of transformers?

15. Ability to apply AS/NZ 3000 requirements for protection of circuit against overcurrent and abnormal voltages:
a. Briefly discuss the relationship between the fault levels in AS 3000 wiring rules and the minimum fault level specified by the electricity distributor.
b. What 4 methods should be used for protection against short circuit currents?
c. Briefly outline the 2 arrangements that should be followed for protection against overload.
d. Discuss the coordination of overload and short-circuit protection devices.
e. Outline the equations that can be used to coordinate between conductors and overload protection devices.
f. Identify 4 causes of overvoltage.
g. List at least 4 causes of undervoltage.
h. What are the requirements in the AS 3000 for the protection against over and undervoltage?

16. Additional protection by use of RCDs and use of extra-low voltage for basic and fault protection:
a. What are the range of limitations that apply to RCD's providing protection against contact with live parts?
b. Outline the AS/NZS 3000 requirements that apply to the use of RCDs.
c. What are the required conditions for the use of extra-low voltage to provide for basic and fault protection?
d. Outline the AS/NZS 3000 requirements that apply to the installation of SELV and PELV systems.

17. Ability to select cables for single and three phase mains and sub-mains for single and multiple installations that comply with requirements of AS/NZS 3000 and AS/NZS 3008.1:
a. What methods could you use to determine the maximum demand for single and three phase mains and submains?
b. What are the 4 different types of cables that may be available for the mains and submains?
c. What types of installation methods could be used?
d. What are the external influences that may affect cable current-carrying capacity?
e. Briefly discuss voltage drop limitations.
f. There are a range of short circuit performance considerations. What do these include?

18. Ability to select cables for final sub-circuits that comply with requirements of AS/NZS 3000 and AS/NZS 3008.1:
a. What are the requirements for the maximum demand of final sub-circuits?
b. What are the types of cables available?
c. What are 3 installation methods that could be used for final sub-circuits?
d. What are 3 of the external influences that may affect the cable current capacity?
e. How can you determine the effect of earth-fault loop on impedance and voltage drop limitations on a circuit route length?
f. What short-circuit performance considerations should be considered?

19. Ability to apply AS/NZS 3000 requirements for control and protection of installations:
a. Briefly discuss each of the following devices used as functions of isolation:
i. Emergency.
ii. Mechanical maintenance.
iii. Functional control.
b. What methods can be used for assessing prospective short circuit currents?
c. Discuss the devices and the arrangements that are used for protection against overload and short-circuit current.
d. What additional protection can be provided by RCD?
e. What protection can be installed against switchboard internal arc faults?

20. Ability to apply AS/NZS 3000 requirements for the installation of electrical equipment in given damp situations:
a. What are the protection requirements that should be followed for selecting the installation equipment used in classified zones, including damp situations?
b. What are the requirements for equipotential bonding in showers, bathrooms, swimming and spa pools?

21. Ability to install, modify and test electrical equipment for construction and demolition sites, complying with AS/NZS 3012 and applicable workplace safety legislation:
a. Outline the supply and install requirements that apply to electrical equipment for construction and demolition sites.
b. Circuits on construction and demolition sites must be adequately protected according to AS 3012 and AS 3000. What does this include?
c. What are the initial and periodic inspection and testing requirements that will need to be complied with?
d. Outline the requirements for portable tool safety tagging and testing so that it is conducted in accordance with AS/NZS 3760.

22. Knowledge of AS/NZS 3000 requirements for the installation of aerial conductors and underground wiring:
a. Identify and discuss the different types and application of aerial conductors.
b. What are the limitations and required clearances for aerial span?
c. What information should be referred to when selecting the aerial supporting poles/post and struts for a given application?
d. Briefly discuss the use and the requirements of catenary support systems.
e. What are the cable types and protection types that are acceptable to use for underground wiring categories?
f. Outline the minimum depth of cover and protection required for the underground wiring.
g. Identify the underground wiring clearances required from other services.

23. Knowledge of AS/NZS 3000 requirements for electrical installations in hazardous areas:
a. What are the types of areas that are classified as hazardous areas?
b. Outline the standards to which the selection, installation and maintenance of electrical equipment will need to comply with.
c. What is the additional training that is required to work competently with electrical equipment for hazardous areas?

24. Ability to verify compliance of an electrical installation in accordance with AS/NZS 3000:
a. Identify the 6 sections in the AS/NZS 3000 that will need to be considered when conducting a visual inspection to verify the compliance of an electrical installation.
b. What will it be necessary to do when carrying out visual inspection to ensure that all requirements have been complied with?
c. Outline the considerations that will need to be made when complying with the mandatory testing that is required in AS/NZS 3017.

25. Ability to perform effective safe isolation of any equipment:
a. Outline the steps to follow to prepare a ‘safe work method statement' (SWMS) or Job Safety Analysis (JSA) for effective safe isolation.
b. What are the safe methods that can be used to identify the source of a supply to be isolated?
c. Outline the range of different isolation techniques that can be used in order to ensure that the required areas of the circuit and all related components are able to be successfully isolated.
d. What are the safe methods to use when confirming effective and safe isolation?

26. Ability to apply AS/NZS 3000 requirements to install and terminate thermoplastic insulated cables; elastomer sheathed cables; XLPE sheathed cables; and high temperature cables; armoured cables; and neutral screened cables in a wide range of applications:
a. Identify the components that will need to be assessed when seeking to apply the AS/NZS 3000 requirements to install and terminate thermoplastic insulated cables elastomer sheathed cables, XLPE sheathed cables, high temperature cable, armoured cables and neutral screened cables.

27. Ability to perform the circuit tests required for electrical cables in a range of installations and final sub-circuit:
a. Outline at least 8 of the safe testing procedures that should be applied when conducting testing.
b. Outline the test to be conducted to show if the earth continuity and earth-fault loop impedance are sufficiently low.
c. Discuss the testing that should be conducted to show if insulation resistance is sufficiently high.
d. Testing for polarity and circuit connections must be conducted using what 3 tests?

28. Ability to install final sub-circuit wiring into switchboards and connect to switchboard equipment in accordance with AS/NZS 3000 and electricity distributor's requirements:
a. What are the necessary requirements to consider when installing final sub-circuit wiring into switchboards and connect switchboard equipment in accordance with the AS/NZS 3000 and the electricity distributors' requirements?

29. Ability to apply AS/NZS 3000 and electricity distributor's requirements for the installation and connect consumers mains:
a. What are the requirements that will need to be complied with when following the requirements of AS 3000 and electricity distributor's requirements for the installation of underground and overhead consumer mains?
b. Briefly discuss the following consumer mains terminations:
i. Pillars.
ii. Pits mains connection boxes.
iii. Consumers switchboard.
c. What are the requirements that must be considered when installing unprotected consumer mains to reduce the chance of short circuit to a minimum?
d. It will be necessary to ensure that bonding conductors are used within switchboards and consumer connection boxes in order to ensure what?

30. Ability to read, sketch and interpret electrical diagrams:
a. What are schematic diagrams?
b. What is the purpose of a block diagram?
c. What can block diagrams be used for?
d. Explain the purpose and application of wiring diagrams.
e. Outline the steps to follow to develop a cable schedule for a given installation.
f. What are the conventions that are used when documenting electrical information?
g. What will it be necessary to do when setting out to read and interpret schematic, block and wiring diagrams, plans and schedules?
h. What is it essential to ensure when sketching electrical diagrams using conventional symbols?
i. Identify at least 5 of the conventional symbols commonly used in electrical diagrams.

31. Knowledge and understanding occupational safety and health:
a. Outline the basics that need to be considered in relation to Occupational Safety and Health regulations.
b. What are the legal responsibilities for employers in relation to OHS?
c. What are the legal responsibilities that employees must meet for effective workplace OHS?
d. Discuss "Duty of Care" in relation to employers and employees.
e. What is the role of the safety committee?

32. Knowledge and understanding of the requirements for personal safety in the workplace:
a. What is the purpose of an SWMS?
b. When would a SWMS be used?
c. What is the purpose of a JSA?
d. Why is it important to report OHS incidents?
e. What is generally included in the process for reporting an OHS incident?
f. What are the common safety procedures to be employed when working with electrical circuits and equipment?
g. Outline at least 1 procedure that should be followed for the safe and effective isolation of electrical supply.
h. What are the regulations to be followed for the supervision of apprentices and trainees working in the electrical industry?

33. Process in rescuing a person in contact with live electrical conductors or equipment and the primary importance of the safety of the rescuer:
a. Outline a process that could be followed to rescue a person in contact with live electrical conductors or equipment.
b. What is the importance of a safety observer during a rescue?

34. Application of emergency first aid requirements for an electric shock victim:
a. Outline the process that should be followed when calling for help on a worksite.
b. Outline the process for providing CPR to an unresponsive person.
c. Briefly discuss the selection and use of fire extinguishers to control an electrical fire.
d. How should you use a fire extinguisher?

35. Dangers of high voltage equipment and distribution systems:
a. What is touch induced voltage, and why is it dangerous?
b. Briefly discuss the danger of step induced voltage.
c. List 3 sources of induced voltage and stored energy that may be encountered on worksites.
d. Outline creepage and clearance requirements that relate to high voltage equipment and distribution systems.
e. What are the safe working procedures that will need to be applied when working in the vicinity of HV equipment?

36. Systematic method of commissioning and decommissioning electrical equipment and installations:
a. Identify the safety procedures that must be followed when commissioning electrical equipment.
b. Why does the circuit voltage need to be tested?
c. What are phase rotation checks and why are they required?
d. What type of functional testing will need to be completed on electrical equipment?
e. Instrument and control parameter settings will need to be checked to ensure they are in compliance with what requirements?
f. What are the safety procedures to be applied and followed when decommissioning electrical equipment?
g. What can you do to identify circuits with their control and protection devices?
h. What impact does isolation have on the other parts of an installation?
i. It will be necessary to ensure that tagging, testing and earthing is conducted in order to ensure that the portion of the circuit will be safe to work on. What do these actions include?
j. What is it necessary to do to ensure the safe removal of equipment?

37. Diagnosing and rectifying faults in electrical apparatus and associated circuits:
a. How do you test for an open circuit?
b. How will short-circuit faults be identified?
c. What unsafe conditions might you test for, and what tests would you use to do so?
d. How would you determine failure of apparatus and/or components?
e. How might related mechanical failure occur?
f. There are a range of actions that can be used in order to rectify unsatisfactory resistance of an earth-fault current path or level of insulation. What do te3hse include?
g. What are the safety requirements that will be necessary to check about circuits such as those supplying fixed appliances, lighting, socket outlets, motors, controls circuits, transformers, electronic and computer based equipment?

OBSERVATION/DEMONSTRATION

The following task 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.

For this task you are to work with others to effectively verify the compliance and functionality of low voltage general electrical installations on at least 2 occasions, including identifying non-compliance both visually and from test results including the causes and reporting them using the appropriate documentation.

On each occasion you will need to complete the following steps to effectively prepare to inspect and test an electrical installation, in accordance with legislative requirements and established procedures:

1. Identify, obtain and consultation with relevant personnel to understand the OHS measures for the site.

2. Throughout all preparation activities, follow the established OHS risk control measures and procedures.

3. Note down any safety hazards which have not previously been identified, and implement the established risk control measures.

4. Review the documentation or deemed to comply standard on which the installation is based, and consult with relevant others to ensure the information is appropriately understood.

5. Consult with the appropriate personnel to ensure that the work is coordinated effectively with all others involved on the work site.

6. Identify, select and obtain the tools, equipment and testing devices needed to verify compliance, and check them to ensure correct operation and safety.

7. Check the preparatory work to ensure that no damage has occurred and that it complies with all requirements.

Perform the following steps on each occasion to visually inspect and conduct safety testing on the installation:

8. Throughout visual inspection follow all OHS risk control measures and procedures for carrying out the work.

9. Determine the need to test or measure live in strict accordance with OHS requirements, and when it is necessary, conduct it within the established safety procedures.

10. In strict accordance OHS requirements and procedures, check to ensure that circuits/machines/plant are isolated where necessary.

11. Check that the wiring is suitable for the environment in which it is installed and that it is suitably protected from damage or overheating.

12. Confirm that the cable conductor sizes meet the current-carrying capacity requirements as well as voltage-drop and fault-loop impedance limitations.

13. Validate that protection methods and devices meet the co-ordination requirements for overload and short-circuit protection.

14. Validate that switchgear and control gear is appropriately rated and that it meets all functional requirements.

15. Cite evidence to confirm that electrical equipment complies with safety requirements.

16. Check to ensure that earthing system components are correctly located and that the conductors are correctly sized.

17. Check the markings on switchboards for accuracy and clarity and ensure that they comply with all requirements.

18. Conduct the required mandatory tests to verify that :
a. Earthing conductor resistance is sufficiently low.
b. Insulation resistance is sufficiently high.
c. All polarities are correct.
d. Circuit connections are correct as per AS/NZS3000.

19. Conduct additional testing to verify that:
a. The fault-loop impedance is sufficiently low.
b. The residual current devices operates as intended as per the AS/NZS3000.

Complete the following steps on each occasion to report on the inspection and test findings, in accordance with all established procedures:

20. Throughout the task ensure to follow all OHS risk control work completion measures and procedures.

21. Clean the worksite and make it safe.

22. Identify any non-compliance defects from test results and report these, including the causes of the non-compliance identified.

23. Make appropriate recommendations for rectifying the identified defects.

24. Complete all mandatory documentation.

Throughout the above activities completed, you will need to:

25. On at least one occasion throughout the verification of compliance and functionality of low voltage general electrical installations, identify an unplanned event and draw on your knowledge and skills to provide an appropriate solution, within the scope of established procedures. This event may be, but is not limited to, the following unplanned events:
a. You hear an alarm, there is a fire in another area of the worksite.
b. A co-worker has an accident with a piece of machinery and has been injured.
c. Toxic fumes have been accidently released in your area.
d. The building you are working in becomes live with electricity.
e. A co-worker collapses.
f. Unexpected test results.

Throughout all the above activities, you will need to ensure that you:
• Implement and follow all relevant OHS requirements at all times.
• Apply sustainable energy principles and practices to your work.
• Demonstrate an appropriate level of knowledge and skill relevant to the tasks.
• Conduct all work observing the relevant legislation, regulations, polices and workplace procedures, especially those relating to anti-discrimination.

Once you have completed the above activities on at least two occasions, you will need to sit down with your assessor to discuss:

26. Methods used to implement and monitor OHS requirements throughout the installation.

27. Practices used to ensure sustainable energy principles throughout the installation.

28. Identify and discuss the legislation, regulations, polices and workplace procedures that relate to observing anti-discrimination practices in the workplace.

29. Safe work practices applied and followed for working on electrical systems, circuits and apparatus.

30. The tools and equipment that were needed throughout the task to conduct electrical installation compliance inspection and testing.

31. Any of the safe working procedures implemented when connecting and testing transformers.

32. Method used throughout the task for assessing prospective short circuit current.

33. Types of areas classified as a hazardous area

34. Visual inspections conducted to determine whether an installation complies with requirements set out in Section 2 to 7 of AS/NZS 3000 and relevant specific installation standards.

35. Safe methods used throughout the task for identifying the source of the supply that is to be isolated.

36. The basics of OHS regulations that are applicable in the workplace.

37. The purpose of and how any SWMS's and JSA's were used throughout the task.

38. Safety procedures followed for working with electrical circuits and equipment.

QUESTIONS

The following questions may be answered verbally with your assessor or you may write down your answers. Please discuss this with your assessor before you commence. Short Answers are required which is approximately 4 typed lines = 50 words, or 5 lines of handwritten text.

Your assessor will take down dot points as a minimum if you choose to answer them verbally.

Answer the following questions either verbally with your assessor or in writing.

1. In what documentation might you identify and obtain the OHS procedures for a given work area at would need to be understood through the established routines and procedures?

2. Identify and discuss the hierarchy of established risk control measures that will need to be implemented and followed for the risks identified in preparation for the work.

3. What will you need to do about safety hazards that have not previously been identified?

4. Identify at least 1 of the types of documentation or deemed to comply standard on which the installation is based that will need to be reviewed and understood for the task.

5. Who is the appropriate person from which to seek advice about the effective coordination of work with others?

6. When should tools, equipment and testing devices that are needed to verify compliance be checked for correct operation and safety?

7. List at least 6 of the requirements that preparatory work may need to be checked to ensure compliance with.

8. What OHS risk control measures and procedures can be followed to reduce the risks associated with manual handling while carrying out the work?

9. What is required for the determining the need to test and measure live and for the conducting of the testing?

10. Briefly discuss the requirements for the checking of circuits, machines and/or plant as being isolated.

11. What does wiring need to be checked for?

12. How can the calculation of the expected fault loop impedance for a given circuit arrangement can be determined?

13. It is essential that the range of switchgear and control gear that is required for the installation is checked for rating and functional requirements and verified against what requirements?

14. Briefly outline the correct sizing of earthing conductors.

15. What will it be necessary to check for when checking the marking on switchboard for clarity and accuracy?

16. Mandatory tests will need to be conducted to ensure what information?

17. What testing will need to be conducted on fault-loop impedance and residual current devices?

18. Outline the safe manual handling safety and assessment tasks that should be completed throughout conducting manual handling tasks during work completion.

19. What types of clearing tasks may be completed top clean and make the worksite safe in accordance with established procedures? List at least 4.

20. What information will need to be obtained and reported about any non-compliance defects?

21. What is it necessary to ensure when making recommendations for rectifying defects according to established procedures?

22. When completing mandatory documentation in accordance with established procedures, the results of what 4 types of tests will need to be taken on industry approved documentation?

23. What information will the above documentation require for AS 3000 requirements?

Attachment:- Electrical installations.rar