GB/T 7251.1 Low-voltage switchgear and controlgear assemblies - Part 1: General principles*, 2023-08-06 Update
IEC 60695-11-10:2013 Fire hazard testing.Part 11-10: Test flames.50 W horizontal and vertical flame test methods
ISO 6506-1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 7251.5-2017 history
2017GB/T 7251.5-2017 Low-voltage switchgear and controlgear assemblies—Part 5: Assemblies for power distribution in public networks
2008GB 7251.5-2008 Low-voltage switchgear and controlgear assemblies.Part 5:Particular requirements for assemblies for power distribution in public networks
1998GB 7251.5-1998 Low-voltage switchgear and controlgear assemblies Part 5: Particular requirements for assemblies intended to be installed outdoors in public places--Cable distribution cabinets (CDCs)for power distribution in networks