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4-20ma Cabling - 3Wire

Les Spiteri
I have read many times about how it is beneficial to wire 4-20ma loops using twisted pair, however what if the wiring is 3 wire (i.e. +,- and signal)?
  • Does this mean that you simply use screened three core?

  • Does this mean you use two twisted pair and if so what one is the single?

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    Graham,

    Thanks for the explanation - I am now somewhat less confused, and your explanation makes perfect sense and seems to answer Les's question.
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    Graham,

    Thanks for the explanation - I am now somewhat less confused, and your explanation makes perfect sense and seems to answer Les's question.
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