Alabama Administrative Code
Title 770 - ALABAMA PUBLIC SERVICE COMMISSION
Chapter 770-X-3 - SPECIAL ELECTRIC RULES
Section 770-X-3-.10 - Voltage Limits
Current through Register Vol. 42, No. 5, February 29, 2024
(1) Standard Nominal Voltages - Each utility shall adopt, and file with the Commission, standard nominal voltages for each of the several areas into which its distribution system or systems may be divided.
(3) Secondary Voltages - For all retail service except power service, the variations of voltage shall be no more than six percent (6%) above or below the standard voltage at any time. For retail power service, the variation of voltage shall be no more than ten percent (10%) above or below the standard voltage at any time. Retail power service shall be those industrial customers that have largely motor load. Some examples are saw mills, rock crushers and grist mills (not an all inclusive list).
(3) Phase Voltages - Where three-phase service is provided, the utility shall exercise reasonable care to assure that the phase voltages are in balance.
(4) Primary Voltages
(5) Exceptions to Voltage Requirements - Voltage outside the limits specified will not be considered a violation when the variations:
Author: Alabama Public Service Commission
Statutory Authority: Code of Ala. 1975, §§ 37-1-32, 37-1-38, 37-1-52, 37-1-57.