20 : 10 : 39 : 43 . Conducting the secondary neutral voltage drop test. The secondary neutral voltage drop test is performed for all service entrances. A proxy load of known characteristics is required for the secondary neutral voltage drop test. The proxy load must create a known and stable current and subsequent voltage drop for each neutral serving a main panel, sub-panel, or end-of-service area. Service entrances not being tested shall be turned off.

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

General Authority: SDCL 49-47-2.

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