This standard covers letter symbols used to represent physical quantities in the field of electrical science and electrical engineering. These symbols are independent of the units employed or special values assigned. Also included are selected symbols for mathematics and for physical constants.

定价： 83元 / 折扣价： 71 元

This standard specifies the design of symbols denoting the incidence of radio-frequency (RF) electromagnetic energy in the frequency range from 3 kHz to 300 GHz. The standard also specifies the use of these symbols in signs and labels intended to warn workers and the public of the presence of potentially hazardous levels of RF energy and other hazards that may arise from RF energy, such as RF induced currents, shocks, or burns. Guidance on the application and placement of these signs in… read more operational settings is not within the scope of this document. Users are referred to IEEE Std C95.7-2014 [B9] for additional guidance relative to placement of signage. read less

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This standard provides a list of graphic symbols for the designation of electrical, electronic, and pole line devices for layout drawings of cable television (CATV) systems. This standard does not use reference designation and class designation letters.

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Description of warning symbols for radio frequency radiation and radio frequency induced and contact currents in the frequency range of 3 kHz to 300 GHz.

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定价： 53元 / 折扣价： 46 元

This standard provides a basis for Showing the general physical location and arrangement of the sections of the required wiring system Identifying the physical requirements for various types of materials needed to provide the electrical installation in buildings In some instances, the symbols may indicate the function or electrical characteristics of the system; however, that is not their primary purpose. Such functions or characteristics are shown by the use of the graphic symbols for… read more electrical diagrams, as specified in American National Standard Y32.2-1970, Graphic Symbols for Electrical and Electronics Diagrams (IEEE Std 315-1971). The required installation is shown on the drawing by the use of the various applicable outlet and equipment symbols, together with interconnecting circuit or feeder run lines, supplemented with necessary notations. In general, basic symbols have been included in the symbol schedule. In some instances, the use of numbers or letters of the alphabet drawn in, or at the side of, the basic symbol to identify a specific application of the symbol for a particular type or use of outlet may be required. In some instances, the physical or electrical size of the item identified by the symbol will be noted to one side of it. read less

定价： 113元 / 折扣价： 97 元

The standard covers letter symbols for units of measurement. The symbols given are intended for all applications, including use in text and equations, in graphs and diagrams, and on panels, labels, and nameplates.

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This standard covers letter symbols for units of measurement. The symbols given are intended for all applications, including use in text and equations, in graphs and diagrams, and on panels, labels, and nameplates.

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