§ 57.14. Service voltage.
(a) Standard voltage. A public utility shall adopt a standard nominal service voltage for the entire territory served by the public utility, and shall file with the Commission data on such standard service voltage or voltages as part of its officially filed tariff. The suitability and adequacy of the standard nominal service voltage or voltages adopted may be determined at any time by the Commission.
(b) Allowable voltage variation (primarily lighting). For service rendered primarily for lighting purposes, the allowable variation in voltage measured at the service terminals of the customer may not exceed, for a longer period than 1 minute in each instance, 5% above or below the standard nominal service voltage and a total variation from minimum to maximum of 8% during normal system operation.
(c) Allowable voltage variation (primarily power). For service rendered primarily for power purposes, the allowable variation in voltage measured at the service terminals of the customer may not exceed, for a longer period than 1 minute in each instance, 10% above or below the standard nominal service voltage during normal system operation.
(d) Variation in excess of allowable limits.
(1) A public utility may, if approved by the Commission, furnish service under conditions of greater voltage variations if there is a filing of the following with the Commission:
(i) A copy of existing contracts containing a provision for the supply of service with such greater variations of voltage.
(ii) A copy of contracts made which contemplate the supply of service under conditions of greater voltage variations and which in each case contain a clause stating the probable variations in voltage which will occur in the service rendered under such contract, and further that such greater variations in voltage will not result in unreasonable discrimination in favor of or against any customer.
(2) Variations of voltage in excess of those specified, caused by the operations of the facilities of the customer in violation of his contract or the filed tariff rules of the public utility, or from causes beyond the control of the public utility, will not be considered as violations of this section.
(e) Records. A public utility shall keep in continuous operation at least one graphic recording voltmeter on each primary network system or on at least one circuit from each substation supplying more than 1,000 customers. These meters shall be installed either at the substation or near the load center of such area or circuits. The hourly readings of indicating voltmeters recorded at points of supply, such as generating stations and main transmission or distribution substations where attendants are regularly on duty, shall constitute a satisfactory voltage record. A public utility shall also install additional graphic recording voltmeters at such places and for such periods of time as the Commission may require.
Authority The provisions of this § 57.14 issued under the Public Utility Code, 66 Pa.C.S. § § 331, 501, 504 and 1501.
Source The provisions of this § 57.14 adopted February 25, 1946; amended through May 29, 1973; amended January 7, 1983, effective January 8, 1983, 13 Pa.B. 131. January 7, 1983, effective January 8, 1983, 13 Pa.B. 131. Immediately preceding text appears at serial pages (78438), (78439) and (20939).
No part of the information on this site may be reproduced for profit or sold for profit.
This material has been drawn directly from the official Pennsylvania Code full text database. Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version.
