20 : 10 : 39 : 34 . The 48 hour test. The 48 hour test determines if stray current or stray voltage exceeds the preventive action level at selected locations over a 48 hour period. The 48 hour test demonstrates whether the primary or secondary sides of the system have a specific impact on the recorded current or voltage at a specific time of day. The results of the 48 hour test may be highly indicative of the presence of stray current or stray voltage.

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

General Authority: SDCL 49 - 47 - 2.

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