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See Chinese contents: GB 16840.2-1997 GB 16840.2-1997: [GB/T 16840.2-1997] Technical determination method for electrical fire cause. Part 2: Recidual magnetic method
This Standard specifies definitions, principles, apparatus, method procedures, judgments, and written procedures to be performed during inspection and appraisal. This Standard is applicable to determine the occurrence of short-circuit and lightning based on data of residual magnetism under the condition that melted mark induced by short-circuit and lightning cannot be found at the fire site of the fire point when investigating the cause of electrical fires; and further analyze relationship with the cause of the fire.
