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Database: 189760 (1 Nov 2025)
DL/T 503-2009 English PDF
DL/T 503: Evolution and historical versions
Standard ID
Contents [version]
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Standard Title (Description)
Status
PDF
DL/T 503-2009
English
359
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Classification and coding regulations for electric power engineering projects
Obsolete
DL/T 503-2009
DL 503-1992
English
199
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Design codes for electrical power engineering
Obsolete
DL 503-1992
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Basic data
Standard ID
DL/T 503-2009 (DL/T503-2009)
Description (Translated English)
Classification and coding regulations for electric power engineering projects
Sector / Industry
Electricity & Power Industry Standard (Recommended)
Classification of Chinese Standard
A24
Classification of International Standard
27.010
Word Count Estimation
9,940
Date of Issue
2009-07-22
Date of Implementation
2009-12-01
Older Standard (superseded by this standard)
DL/T 503-1992
Regulation (derived from)
Industry standard filing Notice 2009 No. 9 (No. 117 overall)
Issuing agency(ies)
National Energy Administration
Summary
This standard specifies the electrical project classification and coding methods, and the corresponding provisions of the code. This standard applies to electrical engineering project management, and information processing and exchange.
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