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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Geometrical tolerancing indication of non-rigid parts
WITHDRAWN published on 27.6.1997
Selected format:Projectable image area on 16mm motion-Picture prints—Dimensions and location
WITHDRAWN published on 28.6.1997
Selected format:Electrical installations of buildings Part 1:Scope, object and fundamental principles
WITHDRAWN published on 28.6.1997
Selected format:Electrical installations of buildings—Part 4:Protection for safety—Chapter 45:Protection against undervoltage
WITHDRAWN published on 24.10.2001
Selected format:Low-voltage electrical installations—Part 4-44: Protection for safety—Protection against voltage disturbances and electromagnetic disturbances
WITHDRAWN published on 14.1.2011
Selected format:Electrical installations of buildings—Part 4:Protection for safety—Chapter 44:Protection against overvoltages—Section 442-Protection of low-voltage installations against temporary overvoltages and faults between high-voltage systems and earth
WITHDRAWN published on 21.11.2001
Selected format:Electrical installations of buildings—Part 4:Protection for safety—Chapter 44:Protection against overvoltages—Section 443:Protection against overvoltages of atmospheric origin or due to switching
WITHDRAWN published on 21.11.2001
Selected format:Electrical installations of buildings—Part 7:Requirements for special installations or locations—Section701:Locations containing a bath tub or shower basin
WITHDRAWN published on 28.2.2002
Selected format:Low-voltage electrical installations—Part 7-701:Requirements for special installations or locations—Locations containing a bath or shower
WITHDRAWN published on 29.6.2012
Selected format:Electrical installations of buildings—Part 7:Requirements for special installations or locations—Section 703:Locations containing sauna heaters
WITHDRAWN published on 28.2.2002
Selected format:Latest update: 2025-11-13 (Number of items: 2 243 644)
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