I am having trouble understanding this electrical diagram. Please help

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SUMMARY

The discussion centers on understanding an electrical diagram for a 4-Point resistivity measurement adapter, specifically addressing confusion over symbols representing shielded wires or coaxial cables. The user, Tony, seeks clarification on the loops and vertical lines depicted in the schematic found in the AeroElectric article. A helpful resource is provided, detailing the symbols used in electrical diagrams, which aids in interpreting the schematic accurately. Additionally, it is noted that the parts list specifies the use of 22 gauge shielded wire for the project.

PREREQUISITES
  • Basic understanding of electrical schematics
  • Familiarity with shielded wire and coaxial cable terminology
  • Knowledge of 4-Point resistivity measurement techniques
  • Ability to interpret electrical symbols
NEXT STEPS
  • Review the AeroElectric article on the 4-Point resistivity measurement adapter
  • Study the provided PDF on electrical symbols from the ARRL
  • Research the properties and applications of 22 gauge shielded wire
  • Explore best practices for wiring and connecting coaxial cables in measurement setups
USEFUL FOR

Electronics enthusiasts, electrical engineers, and hobbyists building measurement devices who need guidance on interpreting electrical diagrams and using shielded wiring effectively.

tonyjnel
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Hi! This is my first post.

I am trying to build a 4-Point resistivity measurement adapter according to instructions that can be found here:

"www.aeroelectric.com/articles/LowOhmsAdapter_3.pdf"

On the fifth page (the second page of the schematic) there is a symbol that I do not recognize (I have never really worked with electrical diagrams before). Around each of the wires coming down from the alligator clips, there are two loops with a vertical line and a dot on the left of the loop. This happens at a 4-pin socket and plug and I am wondering what exactly I am supposed to do there. Also, I don't know what to do about those loops at the alligator clip either.

Thanks for your help,
Tony
 
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Oh. Note that your parts list indicates that it's 22 gauge shielded wire.
 

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