Electrical Wiring Design Considerations
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Questions and Answers

What is a key step in the electrical design process that involves computing panel loads and feeder sizes?

  • Circuiting all lighting devices and power equipment to appropriate panels
  • Checking the preceding work (correct)
  • Coordinating the electrical work with architectural plans
  • Preparing the riser diagram

    • In a two-story building, how are lighting panels typically installed?

  • Recessed into corridor walls (correct)
  • Grouped in an electric closet
  • Installed in the garage, utility room, or basement
  • Placed as close to the load center as possible

    • What is usually integrated into a single unit in private residence electrical design?

  • Emergency equipment and protective equipment
  • Electric closets and riser diagrams
  • Lighting panels and feeder conduit
  • Main disconnect and main switch breaker (correct)

    • What is the purpose of having a minimum of 42 inches of clear working space in front of electrical panels?

    <p>To facilitate easy access for maintenance</p> Signup and view all the answers

    In what scenario would an electric closet be advisable for accommodating electrical panels?

    <p>In a six-story building or higher</p> Signup and view all the answers

    Where are lighting panels typically located in a commercial space with a building that is six stories high or more?

    <p>Grouped in an electric closet</p> Signup and view all the answers

    What is a key consideration for electrical wiring design in terms of flexibility?

    <p>Accommodating all possible electric loads</p> Signup and view all the answers

    How is reliability in electrical wiring design determined?

    <p>By the utility's service and the building's electrical system</p> Signup and view all the answers

    What should a designer be constantly alert to in terms of safety during electrical wiring design?

    <p>Electric hazards caused by misuse or equipment failure</p> Signup and view all the answers

    How does the first cost of an electrical wiring system relate to owning cost?

    <p>Lower first cost leads to higher owning cost</p> Signup and view all the answers

    What is a misconception regarding space allocation in electrical wiring design?

    <p>All electrical equipment is easily concealed</p> Signup and view all the answers

    How are the operating costs of an electrical wiring system primarily influenced?

    <p>By energy consumption</p> Signup and view all the answers

    What is the recommended limit for the number of receptacles on a 15-amp circuit?

    <p>6 receptacles</p> Signup and view all the answers

    Where should a duplex appliance outlet be installed in a kitchen?

    <p>Every 36 inches of counter space</p> Signup and view all the answers

    Why is it recommended to provide disconnecting means for electric ranges, cooktops, and ovens?

    <p>To ensure safety and accessibility</p> Signup and view all the answers

    What item can help lessen vandalism and discourage prowlers in addition to illuminating the house at night?

    <p>Perimeter lighting</p> Signup and view all the answers

    In what area of a bedroom should duplex outlets be supplied?

    <p>At each side of the bed location</p> Signup and view all the answers

    What information is typically included in a panel schedule when circuiting loads?

    <p>Wattage of load, current rating, and circuit number</p> Signup and view all the answers

    What is the purpose of an electric closet in a building's electrical system?

    <p>To group electrical equipment for convenience</p> Signup and view all the answers

    Why is it important for electric closets to have vertically stacking doors?

    <p>To fit architectural and electrical demands</p> Signup and view all the answers

    What is the primary function of an overcurrent device in an electrical circuit?

    <p>To interrupt the circuit when current exceeds rating</p> Signup and view all the answers

    Why should electric closets have sufficient wall space?

    <p>To mount panels, switches, and transformers</p> Signup and view all the answers

    What is a likely consequence of not having floor slots or sleeves in electric closets?

    <p>Difficulty in future installations of conduits</p> Signup and view all the answers

    Why is it advantageous to vary the shape of the space in an electric closet?

    <p>To fit architectural and electrical demands</p> Signup and view all the answers

    How are spare circuits typically figured in terms of load?

    <p>At approximately the same load as the active circuits</p> Signup and view all the answers

    When calculating panel load, what percentage of the office building area is assumed to be corridors and storage?

    <p>15%</p> Signup and view all the answers

    How many panels are required for the office building mentioned in the example?

    <p>Three panels</p> Signup and view all the answers

    What is the purpose of preparing a riser diagram in electrical work?

    <p>To show the vertical relationships of devices and components</p> Signup and view all the answers

    In practice, why are additional circuits provided apart from those needed for lighting and receptacles?

    <p>For spare circuits and receptacles</p> Signup and view all the answers

    In the context of electrical work, what is shown on a riser diagram?

    <p>Vertical relationships of important components</p> Signup and view all the answers

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