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5、) f) . , KS C IEC 6033121(90) 90 . C IEC 60331 23: 2003 4 1: L1,L2,L3: (L2, L3 ) 2: (2A) 3: L3 ( L2 L1) E: ( ) 4: 5: 6: ( ) 7: 8: 1 C IEC 60331 23: 2003 5 A () A.1 IEC 60269 3 1 1a . 2A , 2 Y Y 2A . A.1 23: 135513 7017 (02)60094567 (02)600948878 http:/ KS C IEC 60331-23: 2003KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Tests for electric cables under fire conditionsCircuit integrity Part 23:Procedures and requirementsElectric data cables ICS 13.220.40; 29.020; 29.060.20 Korean Agency for Technology and Standards http:/www.kats.go.kr