20 : 10 : 39 : 57 . Determination of any contributions to stray current or voltage for single phase dairies. The utility contribution to cow contact voltage or cow contact current is determined by the following formulas:

1. (1) Utility contribution to cow contact voltage = ((Vp48 - VP Half) / (Vp Full - Vp Half)) x (Vcc Full - Vcc Half) + Vcc HALF; or

2. (2) Utility contribution to cow contact current = ((Vp48 - Vp HALF) / (Vp FULL - Vp HALF)) x (Icc FULL - Icc Half) + Icc HALF.

   The values determined are compared to the preventive action level.

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

General Authority: SDCL 49-47-2.

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