Ala. Admin. Code r. 770-X-3-.10

Current through Register Vol. 43, No. 1, October 31, 2024

Section 770-X-3-.10 - Voltage Limits

(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.

Ala. Admin. Code r. 770-X-3-.10

Effective January 1968. Amended October 1988. Amended November 2003. Filed with LRS February 5, 2013. Filed for Codification in the Alabama Administrative Code by the Alabama Public Service Commission on February 5, 2013, pursuant to Code of Ala. 1975, § 41-22-7.

Author: Alabama Public Service Commission

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