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Electrical Planning #6 Electrical Working Drawings 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

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electrical planning 6

Electrical Planning #6

Electrical Plan

electrical working drawings3
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

Electrical Plan

electrical working drawings4
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

Electrical Plan

electrical working drawings5
Electrical Working Drawings
  • This is done with the use of electrical symbols

Electrical Plan

electrical symbols
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

Electrical Plan

electrical symbols9
Electrical Symbols
  • Although the wiring diagrams detail how a fixture is wired to a switch,
    • these diagrams are abbreviated on architectural plans

Electrical Plan

electrical symbols11
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

Electrical Plan

electrical symbols12
Electrical Symbols
  • On computer-generated floor plans,
    • this may involve deleting all but
    • the basic wall outline layer

Electrical Plan

to draw an electrical plan14
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

Electrical Plan

to draw an electrical plan15
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

Electrical Plan

to draw an electrical plan16
To draw an electrical plan:
  • #2 Cont’d
    • This line does not represent the actual wiring, only the control link

Electrical Plan

room wiring drawings

Room Wiring Drawings

Electrical Plan

room wiring drawings18
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

Electrical Plan

room wiring drawings22
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

Electrical Plan

room wiring drawings23
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

Electrical Plan

room wiring drawings24
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

Electrical Plan

room wiring drawings25
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

Electrical Plan

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