UL 66

Please note: All interim revisions for this edition available at time of your purchase will be included.

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, 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

These types are for use as specified in Article 402 and other applicable parts of the National Electrical Code (NEC), ANSI / NFPA 70-1999. These types are as described individually in index Tables 4.1 - 4.8 of this standard.