UL 1659 PTFE Wire

This category groups the available UL Style 1659 PTFE wire products. The products below cover a primary general product page, several internal-equipment application pages, one specific AWG page and a number of market-specific purchasing pages — all within the same Style scope of 26 AWG to 4/0 AWG, rated 250°C and 600 Vac with extruded PTFE/TFE insulation.

Conductor material, plating, detailed stranding, finished dimensions, optional ratings, optional coverings, marking, packaging and required documents are not fixed at Style level and must be confirmed during quotation for the applicable ordered construction. For general supply, the entry point is UL 1659 PTFE wire for 250°C 600V internal wiring.

UL 1659 Wire Specifications

UL AWM Style	1659
Construction	Single conductor with extruded insulation
UL Subject / Section	758, Section 1
Temperature rating	250°C
Voltage rating	600 Vac
Conductor range	26 AWG – 4/0 AWG, solid or stranded round
Insulation material	PTFE / TFE
Optional covering	Mica tape wrap
Optional braid	Treated glass braid
Optional ratings	Oil Resistant 80°C; Gasoline Resistant
Flame rating	Horizontal Flame per the UL Style file; VW-1 vertical flame testing available by confirmed construction and agreed order requirement
Marking	General, per UL Subject 758 marking requirements
Use per UL Style file	Internal wiring

Insulation Thickness by AWG Range

AWG range	Minimum average	Minimum at any point
26–10 AWG	20 mils	18 mils
8–2 AWG	30 mils	27 mils
1–4/0 AWG	45 mils	40 mils

The thickness applies to the AWG group, not to the Style as a whole. When comparing products across this category, check which group your AWG falls into before assuming a wall thickness.

Available UL 1659 Constructions

The Style scope covers 26 AWG through 4/0 AWG in solid or stranded round construction. Both conductor forms are within scope across the full range.

The Style file does not define a conductor material, plating, strand count or conductor resistance. These are confirmed for the ordered construction, along with insulation colour, finished outside diameter, wire marking and packaging format.

Four optional elements are listed in the Style file: a mica tape wrap, a treated glass braid, an Oil Resistant 80°C rating and a Gasoline Resistant rating. Each must be specified separately at enquiry — none is applied by default, and specifying one does not carry any of the others. The optional construction, the actual marking applied and any supporting documentation must be confirmed for the ordered product.

Choose a UL 1659 PTFE Wire Product

The product cards below cover several different purchasing situations within the same Style scope:

One primary generic product page for standard UL 1659 supply
Internal-equipment application pages covering particular equipment wiring contexts
One specific 8 AWG product page
Market-specific purchasing pages for Germany, Mexico, Saudi Arabia, UAE and Vietnam/Indonesia, covering regional supply and documentation arrangements

They differ in how the construction is specified and in the commercial context attached to a particular order, not in the underlying Style rating.

Internal Wiring Use

The UL Style 1659 file states the use as internal wiring. That is the boundary within which products in this category are supplied and should be specified.

Whether a specific product is suitable for a given installation depends on the actual ordered construction and the equipment conditions — the equipment type, the internal routing arrangement, the temperature at the wire location, the mechanical conditions along the routed path, and any optional rating required. These must be confirmed rather than inferred from the Style rating. Products in this category are not supplied or positioned for building wiring, field wiring, external equipment cable, direct heating-element leads, direct flame exposure or open furnace routing.

Optional Oil and Gasoline Resistance

Oil Resistant 80°C and Gasoline Resistant are optional ratings listed in the Style file. They are not characteristics of every UL 1659 product shown in this category, and they are separate from the optional mica tape wrap and treated glass braid constructions.

Where either rating is required, the ordered construction, the applicable optional rating, the actual product marking and any required supporting documentation must all be confirmed during quotation. Do not assume a rating applies to a product unless it has been confirmed for that specific order.

UL Marking and Order Documentation

The ordered construction, the applicable certified scope, the optional rating where specified, the actual UL marking applied and the supporting documents must all be confirmed before production. Only products bearing the applicable UL Mark should be represented as covered products.

Where UL, RoHS, REACH, oil-resistance, gasoline-resistance or other documents are required, specify them during enquiry so availability can be confirmed for the ordered construction. Minimum order quantity, sample availability, reel length, packaging, delivery schedule, shipment consolidation and marking are confirmed in the quotation rather than fixed in advance.

Related Fluoropolymer Wire Products

Two other fluoropolymer Styles are available: UL 1332 FEP Wire (200°C / 300 Vac, extruded FEP, 30–10 AWG) and UL 10362 PFA Wire (250°C / 600 Vac, extruded PFA, 30 AWG–4/0 AWG). Selection between them follows the insulation material, ratings and conductor range required by the equipment design.

The wider ranges are available under Fluoropolymer Wire and AWM Wire.