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Additional resources for 315-1975 (R1993) IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters) Bound with 315A-1986 (R1993) Supplement to IEEE Std 315-1986

Example text

11 Resistive termination Commonly used in coaxial and waveguide diagrams. 12A: Use only if essential to indicate special characteristic. 2A — Capacitors may be represented by either of two methods. For convenience in referring to the capacitor symbols in this section, they are classified as follows: Style 1 symbols are drawn with two parallel lines (IEC preferred). Style 2 symbols are drawn with one straight and one curved line. 1, this indicates that either style may be used, as modified for that particular application.

1, this indicates that either style may be used, as modified for that particular application. 2C — The distance between the plates shall be between one-fifth and one-third of the length of a plate. 1A — For style 1, if it is necessary to identify the capacitor electrodes, the modified element shall represent the outside or lower potential electrode. 1B — For style 2, if it is necessary to identify the capacitor electrodes, the curved element shall represent: a) The outside electrode in fixed paper-dielectric and ceramic-dielectric capacitors; b) The moving element in adjustable and variable capacitors; c) The low-potential element in feed-through capacitors.

2 — Symbols for single-line (one-line) diagrams appear at the left, symbols for complete diagrams at the right, and symbols suitable for both purposes are centered in each column. 1. 38 Copyright © 1975 IEEE All Rights Reserved ELECTRICAL AND ELECTRONICS DIAGRAMS IEEE Std 315-1975 3. 1 Guided path, general A single line represents the entire group of conductors or the transmission path needed to guide the power or signal. For coaxial and waveguide work, the recognition symbol is used at the beginning and end of each kind of transmission path and at intermediate points as needed for clarity.

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