Md. Code Regs. 20.50.02.02 - Acceptable Standards
Unless otherwise specified by the Commission, the utility shall use the applicable provisions in the latest revised version of the incorporated by reference publications listed below as standards of accepted good engineering practice in this subtitle:
A. National Electrical Safety Code, ANSI C2 - 2017;
B. National Electrical Code, ANSI/NFPA 70 - 2020;
C. American National Standard for Electric Meters - Code for Electricity Metering, ANSI C12.1 - 2014;
D. American Standard Requirements, Terminology and Test Code for Instrument Transformers, ANSI/IEEE C57.13 - 2016;
E. Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018;
F. Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018 Amendment 1 (IEEE Std. 1547a-2020);
G. Errata to Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018;
H. IEEE 1547.1-2020, Standard Conformance Test Procedures for Equipment Interconnecting Distributed Energy Resources with Electric Power Systems and Associated Interfaces;
I. UL Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL Standard 1741, Edition 3, Edition Date: September 28, 2021;
J. NEMA Standards Publication TP 1 - 2002;
K. Guide for Electric Power Distribution Reliability Indices, IEEE Standard 1366 - 2003, 4.5 Major event day classifications; and
L. Institute of Electrical and Electronic Engineers Standard 1695 - 2016 - IEEE Guide to Understanding, Diagnosing, and Mitigating Stray and Contact Voltage.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
Unless otherwise specified by the
A. National Electrical Safety Code, ANSI C2 - 2017;
B. National Electrical Code, ANSI/NFPA 70 - 2020;
C. American National Standard for Electric Meters - Code for Electricity Metering , ANSI C12.1 - 2014;
D. American Standard Requirements, Terminology and Test Code for Instrument Transformers, ANSI/IEEE C57.13 - 2016;
E. Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018;
F. Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018 Amendment 1 (IEEE Std. 1547a-2020);
G. Errata to Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE 1547-2018;
H. IEEE 1547.1-2020, Standard Conformance Test Procedures for Equipment Interconnecting Distributed Energy Resources with Electric Power Systems and Associated Interfaces;
I. UL Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL Standard 1741, Edition 3, Edition Date: September 28, 2021;
J. NEMA Standards Publication TP 1 - 2002;
K. Guide for Electric Power Distribution Reliability Indices, IEEE Standard 1366 - 2003, 4.5 Major event day classifications; and
L. Institute of Electrical and Electronic Engineers Standard 1695 - 2016 - IEEE Guide to Understanding, Diagnosing, and Mitigating Stray and Contact Voltage.