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What is the recommended wire size for extending the current transformer (CT) wire length?
Customer is requesting to extend the length of the CT with minimal accuracy discrepancy.
Typically 12 Gauge is used for lengths between 0 to 25 feet, 10 Gauge for 25 to 50 feet, and 8 Gauge for over 50 feet.
Extending the cable adds resistance (burden) to the current circuit, so the idea is to minimize the amount of resistance in the wiring so that the accuracy is affected at a minimum.
Follow the steps and chart below for a more accurate selection in wire gauge.
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