Electrical Installations: Circuit Control Assessments
19 Questions
5 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Identify two reasons for dividing electrical installations into circuits. (Select one or more)

  • Facilitate safe operation, inspection, testing and maintenance (correct)
  • Provide effective circuit protection discrimination
  • Avoid danger and minimise inconvenience in the event of a fault (correct)
  • Simplify installation of wiring systems and equipment
  • Select FOUR aspects that require consideration when arranging an electrical installation into an appropriate number of separate circuits. (Select one or more)

  • The ability to service, alter or add to the installation with minimal disruption (correct)
  • The load and operating characteristics of the equipment compared to the rating of the circuit components (correct)
  • Whether equipment is required to operate as a group (correct)
  • Being able to locate faults and how a circuit failure may affect loss of supply (correct)
  • The potential temperature on the day of electrical installation as it could affect the equipment
  • The maximum demand of the sub main supplying a domestic electrical installation may be estimated by:

  • Measuring the load drawn from supply
  • Using appropriate diversity factors for connected load from AS 3000 Table C1 (correct)
  • Determining the sum of the current settings of the circuit breakers protecting the associated final subcircuits
  • Contacting the supply authority
  • Socket outlets fitted in industrial electrical installations have differing diversity from socket outlets fitted in domestic installations due to dissimilarities in:

    <p>Daily demand</p> Signup and view all the answers

    A commercial installation has an air conditioner and heater installed. The equipment with the highest current draw can be taken as the maximum demand due to:

    <p>Seasonal demand</p> Signup and view all the answers

    Refer to the following circuit diagram: Use the information in the diagram and table to choose the combinations of X, Y, and Z that is correct. Complete the following schedule of final sub circuits by selecting the answer that contains the missing information.

    <p>X = Lighting, Y = 2.5mm2, Z = 16A</p> Signup and view all the answers

    SELV and PELV systems can be used to provide protection if:

    <p>Circuit voltage does not exceed 50V ac or 120V dc</p> Signup and view all the answers

    According to AS3000, SELV circuits shall not be connected to: (Select Four)

    <p>Other circuits</p> Signup and view all the answers

    PELV circuits have one conductor connected to:

    <p>Earth</p> Signup and view all the answers

    The following diagram is an example of a/an:

    <p>Isolated supply with socket outlet</p> Signup and view all the answers

    Identify two reasons for dividing electrical installations into circuits. (Select one or more)

    <p>Facilitate safe operation, inspection, testing and maintenance</p> Signup and view all the answers

    Select FOUR aspects that require consideration when arranging an electrical installation into an appropriate number of separate circuits. (Select one or more)

    <p>Being able to locate faults and how a circuit failure may affect loss of supply</p> Signup and view all the answers

    The maximum demand of the sub main supplying a domestic electrical installation may be estimated by: (Select one)

    <p>Using appropriate diversity factors for connected load from AS 3000 Table C1</p> Signup and view all the answers

    Socket outlets fitted in industrial electrical installations have differing diversity to socket outlets fitted in domestic installations due to dissimilarities in: (Select one)

    <p>Daily demand</p> Signup and view all the answers

    A commercial installation has an air conditioner and heater installed. The equipment with the highest current draw can be taken as the maximum demand due to: (Select one)

    <p>Seasonal demand</p> Signup and view all the answers

    SELV and PELV systems can be used to provide protection if: (Select one)

    <p>Circuit voltage does not exceed 50V ac or 120V dc</p> Signup and view all the answers

    According to AS3000, SELV circuits shall not be connected to: (Select four)

    <p>Earth</p> Signup and view all the answers

    PELV circuits have one conductor connected to: (Select one)

    <p>Earth</p> Signup and view all the answers

    The following diagram is an example of a/an: (Select one)

    <p>Isolated supply with socket outlet</p> Signup and view all the answers

    Study Notes

    Performance Overview

    • Achieved a perfect score of 100% in the Circuit and Control Arrangements assessment.
    • Completed the assessment in 1 minute and 48 seconds.

    Circuit Division Reasons

    • Simplifying the installation of wiring systems and equipment.
    • Facilitating safe operation, inspection, testing, and maintenance.
    • Providing effective circuit protection discrimination.
    • Avoiding danger and minimizing inconvenience during faults.

    Considerations for Circuit Arrangement

    • Load and operating characteristics should match circuit component ratings.
    • Ability to service or alter the installation with minimal disruption.
    • Locating faults and understanding how a circuit failure impacts supply loss.
    • Special consideration of equipment that needs to operate as a group.

    Estimating Maximum Demand

    • Maximum demand can be estimated using appropriate diversity factors from AS 3000 Table C1.

    Diversity in Socket Outlets

    • Industrial socket outlets exhibit different diversity factors compared to domestic outlets, primarily due to daily demand variations.

    Maximum Demand in Commercial Installations

    • Maximum demand in installations like air conditioners and heaters is determined by the equipment with the highest current draw.

    Circuit Diagram Completion

    • In circuit diagrams, key elements include circuit breaker ratings, circuit descriptions, and cable sizes.
    • Example configuration: Circuit 1 is lighting with a 6A breaker using a 1.5mm² cable.

    SELV and PELV Protection

    • SELV (Separated Extra Low Voltage) and PELV (Protected Extra Low Voltage) systems are protected if circuit voltage does not exceed 50V AC or 120V DC.

    Connection Restrictions for SELV

    • SELV circuits are prohibited from connection to earthing conductors, other circuits, and any extraneous conductive parts, ensuring safety.

    PELV Circuit Conductors

    • PELV circuits have one conductor typically connected to earth, which provides additional safety.

    Example Circuit Type

    • Specific circuit types can include isolated supplies with socket outlets, delineating the features and safety measures inherent in electrical installations.

    Performance Overview

    • Achieved a perfect score of 100% in the Circuit and Control Arrangements assessment.
    • Completed the assessment in 1 minute and 48 seconds.

    Circuit Division Reasons

    • Simplifying the installation of wiring systems and equipment.
    • Facilitating safe operation, inspection, testing, and maintenance.
    • Providing effective circuit protection discrimination.
    • Avoiding danger and minimizing inconvenience during faults.

    Considerations for Circuit Arrangement

    • Load and operating characteristics should match circuit component ratings.
    • Ability to service or alter the installation with minimal disruption.
    • Locating faults and understanding how a circuit failure impacts supply loss.
    • Special consideration of equipment that needs to operate as a group.

    Estimating Maximum Demand

    • Maximum demand can be estimated using appropriate diversity factors from AS 3000 Table C1.

    Diversity in Socket Outlets

    • Industrial socket outlets exhibit different diversity factors compared to domestic outlets, primarily due to daily demand variations.

    Maximum Demand in Commercial Installations

    • Maximum demand in installations like air conditioners and heaters is determined by the equipment with the highest current draw.

    Circuit Diagram Completion

    • In circuit diagrams, key elements include circuit breaker ratings, circuit descriptions, and cable sizes.
    • Example configuration: Circuit 1 is lighting with a 6A breaker using a 1.5mm² cable.

    SELV and PELV Protection

    • SELV (Separated Extra Low Voltage) and PELV (Protected Extra Low Voltage) systems are protected if circuit voltage does not exceed 50V AC or 120V DC.

    Connection Restrictions for SELV

    • SELV circuits are prohibited from connection to earthing conductors, other circuits, and any extraneous conductive parts, ensuring safety.

    PELV Circuit Conductors

    • PELV circuits have one conductor typically connected to earth, which provides additional safety.

    Example Circuit Type

    • Specific circuit types can include isolated supplies with socket outlets, delineating the features and safety measures inherent in electrical installations.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on circuit arrangements and control mechanisms in electrical installations with this assessment. This quiz is designed to help reinforce your understanding of electrical systems and protection measures. Complete it within the allocated time to gauge your proficiency.

    More Like This

    Circuit Chapter Summaries
    12 questions
    Series vs Parallel Circuit Formulas
    6 questions
    Circuit
    5 questions

    Circuit

    CorrectTantalum avatar
    CorrectTantalum
    Use Quizgecko on...
    Browser
    Browser