Electrical and electronic drawing--Intro and Index


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The mid-1980s edition of this guide has undergone extensive revision since the 1980 edition -- this was in response to major changes in the fields of electrical and electronic drawing. For example, many of the new drawings were prepared using computers or systems associated with them. Thus, a new Section 2, Computer-Aided Design [not included in this Guide], has been written to help the student more easily read these drawings and understand the differences between computer-aided and manually created drawings.

Most students do not have easy access to CAD systems that will produce complete electrical drawings. Therefore, Section 1, General Drawing Techniques, has been retained and strengthened so that a student who has not had previous drafting experience can quickly learn to make technical drawings that are not highly complex. In other words, he or she should be able to work most of the problems in the guide after receiving proper instruction.

New subject material includes surface-mounted devices (Section 5), the learning curve (Section 8), solar power (Section 10), robotics (in several sections), and printed-circuit board drawing (Section 6). However, much of the material from the previous edition that is still appropriate has been retained. It should also be noted that much of the material on instrumentation and controls in this guide will not be found in any other guide of its kind. In addition, no other text contains as complete a listing of standard symbols and tables as those appearing in Appendixes B and D.

These important standards have been established by agencies such as ANSI (American National Standards Institute), a private agency founded by industry many years ago, and the IEEE (Institute for Electrical and Electronics Engineers, Inc.), a professional engineering society. Other standards have been formed as needed by JIC (Joint Industrial Council), NMTBA (National Machine Tool Builders’ Association), NEMA (National Electrical Manufacturers Association), and agencies of the U.S. government. The reader may obtain lists of the available standards by writing the organizations listed below.

ASME American Society of Mechanical Engineers, 345 East 47th Street, New York, NY 10017

American National Standards Institute, 1430 Broadway, New York, NY 10018 EIA Electronic Industries Association, 2001 Eye Street, N.W., Washington, DC 20006

IEEE Institute of Electrical and Electronics Engineers, Inc., 345 East 47th Street, New York, NY 10017

JIC Joint Industrial Council, 7901 Westpark Drive, McLean, VA 23101

NEMA National Electrical Manufacturers Association, 2101 L Street, N.W., Suite 300, Washington, DC 20037

NMTBA National Machine Tool Builders’ Association, 7901 Westpark Drive, McLean, VA 23101

Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402

Section 1 -- General Drawing Techniques

Section 2 -- Computer-Aided Design

Section 3 -- Device Symbols

Section 4 -- Wiring, Cabling, and Chassis Drawings

Section 5 -- Printed-Circuit Boards

Section 6 -- Flow Diagrams and Logic Diagrams

Section 7 -- The Schematic Diagram

Section 8 -- Microelectronics

Section 9 -- Industrial Controls

Section 10 -- Drawings for the Electric Power Field

Section 11 -- Electrical Drawing for Architectural Plans

Section 12 -- Graphical Representation of Data

Appendix A:

  • Glossary of Electronics and Electrical Terms
  • Electrical Part (Device) Reference Designations
  • Control-Device Designations
  • Abbreviations for Drawings and Technical Publications
  • The Frequency Spectrum

Appendix B:

  • Symbols for Electrical and Electronics Devices
  • Symbols for Electrical and Electronics Devices for JIC-Oriented Drawings
  • The Relationship of Basic Logic Symbology between Various Standards
  • Electrical Symbols for Architectural Drawings
  • Signaling-System Outlets

Appendix C:

  • Component Identification
  • Resistor Identification
  • Capacitor Identification
  • Inductor Identification
  • Width of Copper-Foil Conductors for Printed Circuits
  • Color Code for Chassis Wiring
  • Circuit-Identification Color Code for Industrial Control Wiring
  • Transformer Color Codes

Appendix D:

  • Approximate Radii for Aluminum Alloys for 90 degree Cold Bend
  • Thickness of Wire and Metal-Sheet Gages (in Inches)
  • Metric Conversion Table
  • Minimum Radius of Conduit (in Inches)
  • Decimal Equivalents of Fractions
  • Small Drills—Metric
  • Twist-Drill Sizes
  • Standard Unified Thread Series
  • Metric Screw Threads
  • Wire Numbers and Sizes

Appendix E:

  • Product and Manufacturers’ Directories, Catalogs, and Other Sources of Design Information
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