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  1. Jun 2023
    1. These two terminals are connected together, forming a common return pathfor load current, as shown in Fig. 2.32. The connection between the negative and thepositive terminals of the supplies results in a common or floating return. The floatingcommon may be connected to the earth ground terminal of a supply, if a particularcircuit requests this. Generally, it will neither help nor hinder circuit performance.

      This shows the proper way to hookup two DC power supplies and how to incorporate them along with grounding them