Electrical Installation
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Questions and Answers

What color combination should the location box be painted with?

  • Blue and green stripes
  • Gray and orange stripes
  • Black and yellow stripes (correct)
  • Red and white stripes

    • What is the purpose of joining the screen and armour of copper cables with suitable wires?

  • To increase the diameter of the copper cables
  • To enhance the aesthetic appearance of the cables
  • To ensure proper earthing and avoid electric shock due to induction (correct)
  • To reduce the cost of cable installation

    • Why is it essential to achieve a low value earth for the copper cable screen and armour?

  • To ensure effective grounding and safety (correct)
  • To make the installation easier
  • To improve weather resistance
  • To expand the lifespan of the cables

    • What should be done first to avoid electric shock during installation?

    <p>Join the copper cable screen and armour using suitable wires</p> Signup and view all the answers

    Which of the following tasks is NOT mentioned as part of the installation process?

    <p>Evolving a protective sleeve for the cables</p> Signup and view all the answers

    What is the primary purpose of painting the location box with black and yellow stripes?

    <p>To indicate a hazardous area</p> Signup and view all the answers

    What should be done first to ensure safety during the installation of copper cables?

    <p>Joint the screen and armour with suitable wires</p> Signup and view all the answers

    How should the copper cable screen and armour be connected to ensure proper functioning?

    <p>With suitable wires that allow for specified screening</p> Signup and view all the answers

    Why is it necessary to earth the copper cable screen and armour with a low value earth?

    <p>To minimize the risk of electric shock</p> Signup and view all the answers

    Which aspect is crucial for ensuring the integrity of the safety measures during installation?

    <p>Earthing at stations to achieve the screening factor</p> Signup and view all the answers

    What is the primary reason for using suitable wires when joining the screen and armour of copper cables?

    <p>To achieve the specified screening factor and prevent electric shock.</p> Signup and view all the answers

    Which of the following describes a requirement for the location box, apart from its color?

    <p>It needs to be affixed securely at that location.</p> Signup and view all the answers

    What role does earthing play for the copper cable screen and armour?

    <p>It helps in ensuring safety by avoiding potential electric shocks.</p> Signup and view all the answers

    What is a critical factor in establishing the earthing for the copper cable screen and armour?

    <p>The value of the earth resistance should be low.</p> Signup and view all the answers

    Which aspect must be prioritized to avoid electric shock during the installation of copper cables?

    <p>Ensuring suitable wires are used for joining components.</p> Signup and view all the answers

    Study Notes

    Location Box Requirements

    • The EC Socket should be mounted on the location box.
    • The location box should be painted with black and yellow stripes for visibility.

    Copper Cable Screen and Armour

    • The screen and armour of copper cables should be jointed using suitable wires.
    • This ensures proper screening and earthing at stations, meeting specified screening factor.
    • This process should be done before any other steps to prevent electric shock from induction.

    Copper Cable Earthing

    • The copper cable screen and armour should be earthed using a low value earth.

    Location Box Requirements

    • The EC socket should be fixed to the location box.
    • The location box should be painted with black and yellow stripes.

    Copper Cable Joint Requirements

    • The screen and armour of copper cables should be jointed with suitable wires.
    • This ensures the specified screening factor, crucial for earthing at stations.
    • This step should be performed first to prevent electric shock due to induction.

    Copper Cable Earthing Requirements

    • The copper cable screen and armour should be earthed with a low-value earth.

    Location Box Safety

    • Location boxes should have EC Sockets installed for convenience and safety.
    • Location boxes should be painted with black and yellow stripes to increase visibility and act as a warning.

    Copper Cable Safety

    • Copper cable screens and armour should be jointed with suitable wires to ensure proper earthing at stations.
    • This jointing process is essential for achieving the specified screening factor, which minimizes electrical induction and potential shocks.
    • Jointing the copper cables before any other electrical work helps prevent electrical shocks due to induction.

    Earthing Practices

    • The copper cable screen and armour should be grounded with a low-value earth connection to minimize electrical hazards.

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