20 : 10 : 39 : 45 . Measurements used for the secondary neutral voltage drop test. For the secondary neutral voltage drop test, the three voltages, the cow contact voltage, the primary neutral to reference voltage, and the secondary neutral to reference voltage, are measured with the proxy load off and then on. Calculated expected voltage drops are compared with measured voltage drops. If the measured and calculated voltage drops differ significantly, further investigation shall be undertaken to determine the source of additional voltage drop within the circuit. Neutral current shall be measured and recorded with the proxy load on.

Source: 42 SDR 174 , effective June 21, 2016 .

General Authority: SDCL 49-47-2.

Law Implemented: SDCL 49-47-2 , 49-47-3 .