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Title:

Electrical Planning

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Complete electrical plans ensure that electrical equipment ... Wiring plans for various rooms and areas in a house are shown in Fig. 31-27 a-j. Electrical Plan ... – PowerPoint PPT presentation

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Title: Electrical Planning


1
Electrical Planning 6
2
Electrical Working Drawings
3
Electrical Working Drawings
  • Complete electrical plans ensure that electrical
    equipment and wiring are installed exactly as
    planned
  • If electrical plans are incomplete and sketchy,
    the installation depends upon the judgment of the
    electricians

4
Electrical Working Drawings
  • Designers should not rely upon electricians to
    design the electrical system, only to install it
  • Conversely, designers do not plan the position of
    every wire,
  • only the position and relationship of all
    fixtures, devices, switches, and controls

5
Electrical Working Drawings
  • This is done with the use of electrical symbols

6
Electrical Symbols
  • Hundreds of electrical symbols are used on floor
    plans
  • to describe what and where electrical elements
    will be installed
  • About sixty symbols apply to residential or light
    construction

7
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8
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9
Electrical Symbols
  • Although the wiring diagrams detail how a fixture
    is wired to a switch,
  • these diagrams are abbreviated on architectural
    plans

10
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11
Electrical Symbols
  • Some floor plans are so filled with dimensions,
    labels, and notes
  • that there is little space for electrical
    symbols
  • For this reason,
  • only the wall outlines are traced as an outline
    for preparing electrical plans

12
Electrical Symbols
  • On computer-generated floor plans,
  • this may involve deleting all but
  • the basic wall outline layer

13
To draw an electrical plan
14
To draw an electrical plan
  • 1
  • Draw all electrical symbols on an abbreviated
    floor plan
  • This will prevent interfering with other lines,
    letters, and numbers on a complete floor plan
  • Electrical symbols are added to the plan in their
    appropriate location
  • If an exact location is required, this should be
    dimensioned or shown on a separate elevation or
    detail

15
To draw an electrical plan
  • 2
  • After all symbols are located on a plan,
  • connect the switches to fixtures
  • or devices by drawing a dashed and curved line
  • from each switch to the outlet, fixture, or
    device
  • that the switch controls

16
To draw an electrical plan
  • 2 Contd
  • This line does not represent the actual wiring,
    only the control link

17
Room Wiring Drawings
18
Room Wiring Drawings
  • Typical architect5ural wiring diagrams identify
    the various electrical fixtures and devices and
    trace the control of each fixture to a switch
  • Wiring plans for various rooms and areas in a
    house are shown in Fig. 31-27 a-j

19
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20
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21
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22
Room Wiring Drawings
  • Because many kitchen appliances are
    heat-producing and therefore require high
    wattages, kitchen outlets are divided among
    several circuits
  • Otherwise, two or more appliances could overload
    a circuit when used at maximum load

23
Room Wiring Drawings
  • Utility rooms also require heavy-duty outlets for
    motor-driven and heat-producing appliances
  • Bedrooms, bathrooms, and closets require
    comparatively low wattage levels

24
Room Wiring Drawings
  • Stairs and halls present special problems in
    electrical planning
  • Three-way switches must be carefully located
  • to provide control at many locations
  • and thus eliminate unnecessary backtracking

25
Room Wiring Drawings
  • In drawing electrical plans on a CAD system,
    symbols can be called up from a symbol library
    and copied into the correct position
  • Electrical symbols are often added by using the
    layering function
  • This enables the symbols to be plotted in a
    different color or omitted totally from the floor
    plan
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