1 Scope

1.1 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, FFHH-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. These types are as described individually in index – of this standard.

Summary of Topics:

This revision of ANSI/UL 66 dated November 4, 2020 includes the following:

– Addition of FFHH-2 Throughout the Standard; 1.1, Table 4.7, Table 4.8, Table 6.1, Table 6.2, 10.1.1, 10.1.4, 10.3.1.1, Table 10.2 – Table 10.6, Table 13.1, 18.1, Section 20A, and Table 25.1; Updated References to UL 2556; 3.1, 6.7.1, 6.7.2, 7.1, 8.1.3, 8.2.1.2, 8.2.2.4, 8.3.2, 9.1, 10.3.2.1, 11.1, 12.1, 12.3, 13.1, 14.1, 14.2, 16.1, 17.1, 19.1, and 20.1; Revised Oil Test Temperatures in Table 26.1

– Oven Definition, Revised 8.2.1.2, 10.3.2.1, Table 14.1 and 20.2