UL 3266 125°C 300V XLPE 32 AWG–10 AWG Wire for Internal Wiring

UL 3266 125°C 300V XLPE Wire for Internal Wiring

This page covers UL AWM Style 3266, a single conductor with extruded XLPE insulation rated 125°C and 300 Vac with a Horizontal Flame designation. It is written for equipment and appliance OEM engineering and procurement teams working from a drawing, BOM or wire specification.

The conductor range is 32 AWG–10 AWG, solid or stranded, the insulation requirement is 15 mils minimum average and 13 mils minimum at any point across that whole range, Marking is General, and the official Use is “Internal Wiring.”

Two points are worth settling before an enquiry. The Use is internal wiring with no equipment category attached, so it is neither an appliance-only Style nor a motor lead Style. And the wall requirement does not change with conductor size, which is less common than it looks and simplifies one part of the specification while leaving others open.

Confirmed UL Style 3266 Construction and Ratings

Nine points to clarify about the table above:

1. The temperature rating is 125°C, stated without a duty qualifier.
2. The normal voltage rating is 300 Vac. The record gives no DC rating.
3. 600 Volts Peak – For Electronic Use Only is an optional tag indication, not the working-voltage rating, and both qualifiers stay attached whenever it is cited.
4. The insulation requirement is 15 mil minimum average and 13 mil minimum at any point: two independent minimums, not a range and not a nominal wall.
5. That requirement applies uniformly across 32 AWG–10 AWG. The record publishes no size-dependent wall table for this Style.
6. The conductor range is 32 AWG–10 AWG, and sizes outside it are outside the Style.
7. Conductor material, plating, strand count, strand diameter and lay length are not defined by the Style.
8. Finished OD, OD tolerance, conductor resistance, metric cross-section and ampacity are not defined by the Style.
9. The Style range is not a stock list, and availability of a given size and construction is confirmed per enquiry.

A Uniform 15/13 mil Wall Across the Range

The insulation is extruded XLPE, and the wall must satisfy two conditions together: an average thickness of at least 15 mils, and a thickness of at least 13 mils at every point around the conductor. Both are floor values, and the second is not a tolerance on the first.

Because the requirement does not step with conductor size, the same two minimums govern a 32 AWG construction and a 10 AWG one. That removes one common source of error, but it also means the wall is proportionally very different at the two ends of the range: on a fine conductor it is a large share of the finished diameter, and on a heavier one it is comparatively slim.

Minimum wall values do not produce a finished outer diameter in either case. Actual OD depends on the conductor material and form, the actual conductor diameter, the XLPE extrusion and manufacturing tolerance, so adding a generic AWG conductor diameter to the minimum wall does not give a valid product dimension. Where connector entry, grommet fit or routing clearance is controlled, state a maximum finished OD and OD tolerance in the RFQ.

The material is extruded XLPE, also written as cross-linked polyethylene. This page does not restate it as PVC, silicone or a fluoropolymer, and does not attribute chemical, oil, solvent or moisture resistance to it, since the record contains no such rating.

Ratings and the Optional Peak Tag

The temperature rating is 125°C. This page does not describe it as continuous or continuous-duty, does not claim any higher figure, and derives no service life, thermal cycling count or thermal margin from it.

The normal voltage rating is 300 Vac, and Style 3266 is not described here as a 600 V wire. Tags may indicate “600 Volts Peak – For Electronic Use Only”: that is a peak indication for electronic use rather than a working voltage, it does not widen the official Use, and writing the Style as 300–600 V or 600 Vac misstates the record. The record also gives no DC rating, so none is stated or derived.

The flame designation is Horizontal Flame. VW-1, FT1, vertical flame, self-extinguishing and fire-resistant descriptions are not part of this record.

Conductor Range and Construction

The Style covers 32 AWG through 10 AWG, solid or stranded, spanning fine internal leads to moderately heavy conductors. Listings showing a wider span describe sizes the Style does not cover.

The following are RFQ fields rather than Style values:

• solid or stranded form
• conductor material
• plating or surface finish
• strand count, strand diameter and lay construction, where controlled
• maximum conductor resistance, where controlled
• metric cross-section, where a drawing specifies mm² rather than AWG

No stranding class, flexibility grade or flex life is applied here. Conductor size assigns no circuit function or current capacity either: the record gives no ampacity, and none is inferred from conductor size, the 125°C rating or the 300 Vac rating. Current-carrying capacity is evaluated through the buyer’s equipment design and the applicable approval process.

Official Use: Internal Wiring

The official Use is “Internal Wiring.” The record attaches no equipment category to it, so this page neither narrows it to appliances nor widens it into building or field wiring, branch-circuit or facility wiring, conduit or tray installations, external equipment wiring, portable cord, or interconnection between separate enclosures.

The Use also does not name motor leads. Where a design requires a wire designated for motor lead service, that is a different AWM Style with its own record, and a Style 3266 construction is not presented here as a substitute for it or as equivalent to it.

Enquiries commonly arrive from contexts such as equipment interiors with elevated ambient temperatures, control and sensor assemblies, or internal harnesses. Those are buyer enquiry contexts that can be reviewed against the drawing, and they do not change the Use. Compliance of a finished product is established at the equipment level and is not conferred by the Style designation of one internal wire, nor does UL Recognition of a component wire establish acceptance under any other national or regional scheme.

How to Specify UL 3266

A Style designation is a construction requirement, not a complete purchase specification. A complete enquiry adds:

• the UL AWM Style 3266 requirement
• the AWG within 32 AWG–10 AWG
• solid or stranded construction
• conductor material and plating, where controlled by the drawing
• strand construction and maximum conductor resistance, where controlled
• insulation colour and any identification requirement
• the marking requirement, including whether the optional peak tag indication applies
• maximum OD and OD tolerance, where controlled
• the internal wiring location
• the drawing, BOM or equipment specification
• documentation requirements, quantity and packaging or reel preference
• the destination and the requested Incoterm

No price, currency, pricing formula or price validity period is published on this page. A quotation is prepared against a defined construction and commercial scope and issued as a separate quotation document.

What Style 3266 Does and Does Not Define

Style 3266 defines:

• 125°C temperature rating and 300 Vac normal voltage rating
• Horizontal Flame
• conductor range 32 AWG–10 AWG, solid or stranded
• extruded XLPE insulation, 15 mil minimum average / 13 mil minimum at any point, uniform across the range
• Marking: General
• Use: Internal Wiring.
• optional tag: 600 Volts Peak – For Electronic Use Only

Style 3266 does not universally define:

• conductor material, plating, strand count, strand diameter or lay length
• finished OD, OD tolerance, bend radius, flex cycles or flex class
• conductor resistance, ampacity, current rating or metric cross-section
• a DC voltage rating
• motor lead service or any equipment category
• chemical, oil, solvent or moisture resistance
• acceptance under any national or regional scheme other than the UL Recognition itself
• colour, reel length, MOQ, stock, lead time, production capacity or shipping term

Common Procurement Errors

• Writing “125°C continuous”, or claiming a higher temperature rating.
• Describing Style 3266 as a 600 V wire, or writing 300–600 V.
• Using 600 Volts Peak as the working voltage, or dropping “For Electronic Use Only”.
• Stating a DC rating.
• Treating 15 mil as a nominal wall, or omitting the 13 mil minimum-at-any-point requirement.
• Assuming the wall steps with conductor size, or borrowing a size-dependent wall table from another Style.
• Deriving a finished OD from the minimum wall values.
• Extending the conductor range beyond 32 AWG–10 AWG.
• Assuming the conductor is tinned copper, or claiming a stranding class or flexibility grade.
• Deriving ampacity from conductor size or the ratings.
• Presenting the Style as motor lead wire, or as a substitute for a Style whose Use names motor leads.
• Describing the insulation as PVC, silicone or a fluoropolymer, or claiming oil and chemical resistance.
• Treating UL Recognition of a component wire as acceptance under another country’s scheme.

RFQ Information to Confirm

Style and ratings

• UL AWM Style 3266 requirement
• 125°C temperature rating requirement
• 300 Vac voltage rating requirement
• AWG within 32 AWG–10 AWG

Conductor and dimensions

• Solid or stranded construction
• Conductor material and plating requirement, if controlled by the drawing
• Strand construction, if controlled
• Maximum conductor resistance or controlled mm² cross-section, if applicable
• Maximum OD and OD tolerance, if controlled

Identification and application references

• Insulation colour and identification requirement
• Marking requirement, including whether the optional peak tag indication applies
• Internal wiring location
• The circuit requirement for engineering review, rather than a self-derived ampacity
• Drawing, BOM or equipment specification

Commercial

• Quantity and packaging or reel preference
• Destination and requested Incoterm
• Requested UL marking and compliance documents, including any RoHS / REACH documentation requirement

UL Marking and Documentation

CableApex is an international sales and export company and does not hold a UL File for Style 3266. Supplied wire is UL-recognized component wire where supplied under a qualified manufacturing scope, with UL marking according to the confirmed ordered construction. The Style record lists Marking as General.

Applicable RoHS / REACH documentation can be confirmed according to the ordered construction. CSA, FT1, VW-1, CE and dual UL/CSA designations are not claimed here, and no conclusion is drawn about acceptance under other national or regional schemes.

Commercial, origin, compliance and transport documents are identified during quotation and confirmed according to the order. They are not supplied as a fixed package with every shipment.

Related Categories

• UL 3266 XLPE Wire
• XLPE Wire
• AWM Wire