UL 66:2005 pdf download – Fixture Wire.
15 Cold Bend Test
15.1 The finished wire shall be capable of being wound onto a mandrel at low temperature without
cracking of the inside or outside surface at the insulation. The test is to be conducted as described in 15.2
— 15.7.
15.2 Round metal mandrels are to be used in this test. The diameter of mandrel for each diameter (measured> of finished wire, with the nylon jacket In place In the case of Types TFN and TFFN, is to be as specified in Table 15,1. For each winding. the mandrel used is to be securely mounted in a position that facilitates the winding.
15.3 The mandrels and lengths of the finished wire are to be conditioned for 4 h in circulating air that is precooled to and maintained at the following temperature:
a) WIRE MARKED ‘SOC OR ‘MINUS 50C”: -50.0 ±2.0°C (-58.0 ±3.6°F).
b) TYPE PF, PFF, PGF, OR PGFF: —35.0 ±2.0°C (—31.0 ±3.6°F).
C) ALL OTHER TYPES: —20.0 ±2.0°C (—4.0 ±3.6°F).
15.4 At the end of the fourth hour, the cold specimens are to be wound individually, and in quick succession, onto the specified mandrel for the following number of turns:
a) SIX COMPLETE TURNS around mandrels 0.250 — 1.250 inch or 6.5—31.8 mm in diameter.
b) ONE COMPLETE TURN around larger mandrels.
15.5 Adjacent turns are to touch one another. The winding is to be at a uniform rate that results in 18 ±3 seconds for six turns. The wincng is to be completed in the cold chamber where space and mounting means are available in the chamber. Where this is not practical, one specimen at a time plus its mandrel are to be removed from the cold chamber and the winding is to be completed outside the chamber. Whether Ills done in or out of the chamber, the winding is to be completed within 30 s of the time that the cold chamber is opened for that specimen. Insulating gloves are to be worn by the person performing the test. Where the same diameter of mandrel is used for a succession of specimens tested outside the cold chamber, either a separate mandrel is to be cold conditioned for each specimen or the mandrel used Is to be returned to the cold chamber for at least 15 mm between tests of successive specimens.
17 Flame Tests for VW-1 Wire
17.1 Finished fixture wire that is marked VW- as described in marking 27.1 shall be capable of complying with the VW-1 (Vertical-Specimen) Flame Test. Section 1080 of UL 1581, and shall also be capable of complying with the Horizontal-Specimen / FT2 Flame Test. Section 1100 of UL 1581. Finished wire that is marked VW-1” and has a nylon jacket or other overall covering that is not required is to be VW-1 and honzontal flame tested both with and without the nylon or other covering.
18 Vertical Flame Test
18.1 Finished fixture wire Types RFHH-2, RFHH-3, KF-1, KF-2, KFF-1, KFF-2. XF, XFF, TF, TFF. TFN, TFFN. PTF. PTFF, PAF. PAFF, PF. PFF, PGF. PGFF, ZF. ZFF, ZHF, SF-i, SF-2, SFF-i. and SFF-2 shall be capable of complying with the Vertical Flame Test. Section 1060 of UL 1581. Types RFH-2 and FFH•2 are not required to comply with any flame test.
18.1 revised June 7, 2005
19 Flexing Test of Nylon Jacket on Types TFN and TFFN
19.1 Finished fixture wire Types TFN and TFFN shall be capable of having the nylon jacket not crack when specimens of the finished wire are aged and wound onto a mandrel as described in Cracking of Nylon Covenng on Coaxial-Cable Members of Elevator Cables or of Nylon Jacket on Types TFN, TFFN, and SPT-1 and of Insulated Conductors in Service Cords. Test, Section 1540 of UL 1581.
20 Durability Test of Ink Printing
20.1 Where the wire markings required in this standard are ink printed on the insulation, jacket, or covering, the printing shall be capable of complying with the test described in Durability of Indelible-Ink Printing, Section 1690 of UL 1581.
21 Polarity Identification
21.1 Where a wire intended as a grounded circuit conductor has a transparent or translucent nylon jacket or extruded covering over the insulation, or has no covering over the insulation, the wire shall be identified by one of the following color means throughout the entire length of the finished wire. The means used is to show through the nylon jacket or extruded covering, Ridges, grooves, and ink or indent or raised printing of words, numbers, and symbols shall not be used for polarity identification.