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20.50.07.00.htm 20.50.07.00. Title 20 PUBLIC SERVICE COMMISSION Subtitle 50 SERVICE SUPPLIED BY ELECTRIC COMPANIES Chapter 07 Quality of Service Authority: Public Utilities Article, §2-121, 5-101, and 5-303, Annotated Code of Maryland
20.50.07.01.htm 20.50.07.01. 01 Standard Frequency.. The standard frequency for alternating current distribution systems shall be either 60 cycles per second or 25 cycles per second.
20.50.07.02.htm 20.50.07.02. 02 Voltage Limits.. A. Secondary Voltages. The voltage at the utility's service terminals, as installed for each customer, shall be maintained within the Limits specified in the table below. If a utility adopts any standard voltage not included in the table, it shall advise the Commission in order that the Commission may establish appropriate voltage limits. When 3-phase service is provided, the utility shall exercise reasonable care to assure that the phase voltage291/504. 630.
20.50.07.03.htm 20.50.07.03. 03 Voltmeters.. A. Requirements. Each utility shall have the following voltmeters for the purposes indicated:. 1) Secondary Standard. Each utility shall have at least one secondary standard indicating voltmeter to be used in checking the accuracy of working standard voltmeters.2) Working Standards. Each utility shall have at least two working standard indicating voltmeters to be used in checking the voltage on the utility's electric system and in checking the accuracy of re
20.50.07.04.htm 20.50.07.04. 04 Voltage Surveys and Records.. A. Voltage Surveys. Each utility shall make voltage measurements, using recording voltmeters, in order to determine if voltages are in compliance with the requirements contained in Regulation .02.B. Point of Measurement. Voltage measurements shall be made at the utility's service terminals. For single phase service, the measurement shall be made between the grounded conductor and the ungrounded conductors. For 3 phase service, the measurement
20.50.07.05.htm 20.50.07.05. 05 Interruption of Service.. A. Endeavor to Avoid Interruptions. Each utility shall make reasonable efforts to avoid interruptions of service, but when interruptions occur, service shall be re-established within the shortest time practicable, consistent with safety.B. Report to Commission.. 1) Each utility shall promptly report to the Commission's Engineering Division and Office of External Relations:a) The onset of a major outage event;. b) A sustained interrupti
20.50.07.9999.htm 20.50.07.9999. Administrative History Effective date: May 22, 1942 (Order No. 38330) ―. Chapter revised effective May 18, 1960 (Order No. 54348) ―. Chapter revised effective June 1, 1965 (Order No. 55819). Regulation .03C amended effective June 6, 2005 (32:11 Md. R. 983). Regulation .05 amended effective April 15, 2002 (29:7 Md. R. 622). Regulation .05B amended effective May 28, 2012 (39:10 Md. R. 661). Regulation .06 adopted effective April 15, 2002 (29:7 Md. R. 622).
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