Originally posted by mudwump
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Shows only one symbol that is somewhat ambiguous in that it does not differentiate by symbol for Earth, Chassis, System or Application, yet seems to be the generalized representation.
Circuit Symbols of Electronic Components
This site shows all three common symbols, of which some Spice circuit design editors use the first symbol and do not offer the others.
Electronics/Symbols - Wikibooks, collection of open-content textbooks
The second and third symbols are common for the older engineer although it also leads to confusion in non-professionals as to what is indicated.
In the context of “Chassis Ground” it once meant connecting to the “Metal” of the “Chassis” which was the overall “Ground” Reference for the circuit.
I generally I try to use symbols, which will be understood by the majority of the reader, and this is often in conflict with correct engineering practice.
In the Wireless/One-Wire Replication being talked about at (this) point, the symbol used represents the PSU or Battery “Return”, “0 Volts” or “Ground (Circuit Ground Return)” it does not in any way reference an “Earth” Ground. In the document covering the specifications for replication, “Earth” Ground is not mentioned or implied, neither is this case with the “Specific” video that shows the working circuit.
No! “Earth” ground is used in this replication.
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