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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
Electrical installations of buildings—Part 5:Selection and erection of electrical equipment—Section 523:Current-carrying capacities in wiring systems
WITHDRAWN published on 28.2.2002
Selected format:Electrical installations of buildings—Part 4:Protection for safety—Chapter 44:Protection against overvoltages—Section 444:Protection against electromagnetic interferences(EMI) in installations of buildings
WITHDRAWN published on 5.8.2002
Selected format:Eletrical installations of buildings--Part 5: Selection and evection of electrical equipment--Section 548: Earthing arrangements and equipotential bonding for information technology installations
WITHDRAWN published on 5.8.2002
Selected format:Electrical installations of buildings—Part 5:Selection and erection of electrical equipment Chapter 51:Common rules
WITHDRAWN published on 5.8.2002
Selected format:Electrical installations of buildings—Part 7:Requirements for special installations or locations—Section 702:Swimming pools and other basins
WITHDRAWN published on 5.8.2002
Selected format:Electrical installations of buildings—Part 4:Protection for safety Chapter 42:Protection against thermal effects
WITHDRAWN published on 28.6.1997
Selected format:Electrical installations of buildings—Part 4-42:Protection for safety—Protection against thermal effects
WITHDRAWN published on 29.7.2005
Selected format:Electrical installations of buildings—Part 5:Selection and erection of electrical equipment Chapter 55:Other equipment Section 551:Low-voltage generating sets
WITHDRAWN published on 21.2.2003
Selected format:Electrical installations of buildings—Part 4-41:Protection for safety-Protection against electric shock
WITHDRAWN published on 14.5.2004
Selected format:Low-voltage electrical installations—Part 4-41:Protection for safety—Protection against electric shock
WITHDRAWN published on 30.12.2011
Selected format:Latest update: 2025-11-13 (Number of items: 2 243 644)
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