A utility shall provide alternating current distribution systems which shall have a design and operating frequency of 60 cycles per second under normal system conditions which shall vary only within a narrow range according to operations criteria established by the ISO-NE.
N.H. Admin. Code § Puc 304.01
#2011, eff 5-4-82; ss by #2912, eff 11-26-84; ss by #4999, eff 11-26-90; ss by #6381, INTERIM, eff 11-27-97, EXPIRED: 3-27-97
New. #6605, eff 10-21-97; ss by #8448, eff 10-18-05