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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
External insulation pollution classes of high-voltage electric power equipments
WITHDRAWN published on 17.7.1993
Selected format:Measurement of partial discharges for instrument transformers
WITHDRAWN published on 1.1.1985
Selected format:Rectangular copper or aluminium and its alloy conductors for electrical purposes—Part 1:General
WITHDRAWN published on 20.11.1985
Selected format:Rectangular copper or aluminium and its alloy wires for electrical purposes—Part 1:General
WITHDRAWN published on 19.3.2009
Selected format:Rectangular copper or aluminium and its alloy conductors for electrical purposes—Part 2:Copper rectangular conductor
WITHDRAWN published on 20.11.1985
Selected format:Rectangular copper or aluminium and its alloy wires for electrical purposes—Part 2:Rectangular copper wire
WITHDRAWN published on 19.3.2009
Selected format:Rectangular copper or aluminium and its alloy conductors for electrical purposes—Part 3:Aluminium rectangular conductor
WITHDRAWN published on 20.11.1985
Selected format:Rectangular copper or aluminium and its alloy conductors for electrical purposes—Part 4:Copper strip
WITHDRAWN published on 20.11.1985
Selected format:Rectangular copper or aluminium and its alloy wires for electrical purposes—Part 4:Strip copper conductor
WITHDRAWN published on 19.3.2009
Selected format:Copper or aluminium and its alloy bus bars for electrical purposes—Part 1:General
WITHDRAWN published on 20.11.1985
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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