The standard frequency for alternating current distribution systems shall be either 60 cycles per second or 25 cycles per second.

Authority: Public Utilities Article, §§2-121, 5-101, and 5-303, Annotated Code of Maryland

Effective date: May 22, 1942 (Order No. 38330)

Chapter revised effective May 18, 1960 (Order No. 54348)

Chapter revised effective June 1, 1965 (Order No. 55819)

Regulation .03C amended effective June 6, 2005 (32:11 Md. R. 983)

Regulation .05 amended effective April 15, 2002 (29:7 Md. R. 622)

Regulation .05B amended effective May 28, 2012 (39:10 Md. R. 661)

Regulation .06 adopted effective April 15, 2002 (29:7 Md. R. 622)

Regulation .06 repealed effective May 28, 2012 (39:10 Md. R. 661)

Regulation .07 adopted effective April 15, 2002 (29:7 Md. R. 622)

Regulation .07 repealed effective May 28, 2012 (39:10 Md. R. 661)