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See Chinese contents: GA/T 537-2005 GA/T 537-2005: Flame-retardant, fire-proof, fire resistance specifications of testing method of bus bar trunking system (busways)
This standard specifies the test device, test conditions, test piece requirements, test procedures, determination conditions, and test reports for the flame retardant, fire-proof, and fire-resistant properties of the busbar trunking system (busways). This standard applies to busbar trunking system (busways) which has a nominal AC voltage of not more than 1000 V and a frequency of 50 Hz or 60 Hz.
