This standard states basic construction, test, and marking requirements for fixture wires. Fixture wires are single conductor and are of the following types:
600 volt Types: PTF, PTFF, PAF, PAFF, KF-2, KFF-2, PF, PFF, PGF, PGFF, SF-2, SFF-2, ZF, ZFF, ZHF, TF, TFF, TFN, TFFN, RFH-2, FFH-2, RFHH-2, and RFHH-3
300 volt Types: KF-1 , KFF-1 , SF-1 , SFF-1 , XF, and XFF
