Alabama Administrative Code
Title 770 - ALABAMA PUBLIC SERVICE COMMISSION
Chapter 770-X-3 - SPECIAL ELECTRIC RULES
Section 770-X-3-.10 - Voltage Limits

Universal Citation: AL Admin Code R 770-X-3-.10

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

(a) For service rendered principally for industrial or power purposes, the voltage variation shall not exceed six percent (6%) above or six percent (6%) below the standard nominal voltages as filed in the utility's rules.

(b) For service rendered to public utilities and others for resale, the nominal voltage shall be as mutually agreed upon by the parties concerned. The allowable variations shall not exceed six percent (6%) above or six percent (6%) below the agreed upon nominal voltage without the express approval of the Commission.

(c) The limitations in (1) and (2) do not apply to special contracts in which the customer specifically agrees to accept service with unregulated voltage.

(5) Exceptions to Voltage Requirements - Voltage outside the limits specified will not be considered a violation when the variations:

(a) Arise from the action of the elements;

(b) Are infrequent fluctuations not exceeding 5 minutes duration;

(c) Arise from service interruptions;

(d) Arise from temporary separation of parts of the system from the main system;

(e) Are from causes beyond the control of the utility.

Author: Alabama Public Service Commission

Statutory Authority: Code of Ala. 1975, §§ 37-1-32, 37-1-38, 37-1-52, 37-1-57.

Disclaimer: These regulations may not be the most recent version. Alabama may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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