UL 3266 XLPE Wire
UL 3266 XLPE Wire — 125°C / 300V Crosslinked Polyethylene Hook-Up Wire
UL Style 3266 is the 125°C crosslinked polyethylene hook-up wire within UL Subject 758 — delivering a meaningful thermal upgrade over PVC-insulated alternatives at the same compact 15-mil insulation wall profile. Rated 125°C and 300 Vac with extruded XLPE insulation certified under UL Subject 758 Section 3, Style 3266 covers internal wiring applications in appliances, motor leads, and electronic equipment where standard PVC wire at 80–105°C operates with insufficient thermal margin under continuous load conditions.
The crosslinked polymer structure of XLPE converts standard polyethylene from a thermoplastic that softens above 90°C into a thermoset material that maintains dimensional and dielectric integrity at 125°C continuous — enabling the same physical wire form factor as Style 1007 and 1569 PVC wire at identical AWG while raising the thermal ceiling by 20–45°C. This direct form-factor compatibility allows thermal upgrade from PVC to XLPE in existing appliance harness designs without modification to grommet sizing, conduit fill, or terminal connector hardware.
Technical Specifications — UL Style 3266
| UL Style | 3266 |
| UL Subject | 758, Section 3 |
| Temperature Rating | 125°C |
| Voltage Rating | 300 Vac (optional: 600 Volts Peak for Electronic Use) |
| AWG Range | 32 AWG – 10 AWG, solid or stranded |
| Insulation Material | Extruded XLPE (crosslinked polyethylene) |
| Insulation Thickness | 15 mils min average / 13 mils min at any point |
| Flame Rating | Horizontal flame |
| Typical Use | Internal wiring of appliances and electronic equipment |
| UL File | E333030 |
UL 3266 vs UL 3271 vs UL 3321 — XLPE Wire Comparison
Style 3266 is the entry point of the UL Subject 758 XLPE wire family. Understanding how it compares to the higher-specification styles helps procurement engineers select the correct wire for each application without over-specifying:
| Parameter | UL 3266 | UL 3271 | UL 3321 |
|---|---|---|---|
| Temperature | 125°C | 125°C | 150°C |
| Voltage | 300 Vac | 600 Vac / 750 Vdc | 600 Vac / 750 Vdc |
| Insulation Wall (fine gauge) | 15 mils min avg | 30 mils min avg | 30 mils min avg |
| AWG Range | 32–10 AWG | 30 AWG–2000 kcmil | 30 AWG–4/0 AWG |
| Semi-conductive layer | No | Optional | No |
| IEC Insulation Class | Class B equivalent | Class B/E equivalent | Class F equivalent |
| Best For | Low-voltage appliance internal wiring, compact harnesses, PVC thermal upgrade | Three-phase motor leads, 600V appliance power circuits, VFD output wiring | Class F motor leads, heavy industrial equipment, high-ambient enclosures |
Typical Applications
- Automotive component motor leads — winding lead wires in small DC and AC motors for seat adjustment, window lift, and HVAC blower assemblies where motor winding temperatures under continuous operation exceed the safe range of 105°C PVC wire.
- Industrial pump motor terminal wiring — stator winding leads and terminal connection wires in centrifugal and submersible pump motors where sustained high-load operating temperatures require 125°C-rated wire at terminal connection points.
- Electronic equipment internal wiring — static internal wiring paths in industrial computers, power conversion equipment, and motor drives installed in high-ambient enclosures where internal temperatures under full load reach 100–115°C.
- Appliance harness thermal upgrade — direct replacement for UL 1007 and UL 1569 PVC wire in existing appliance harness designs where thermal analysis identifies insufficient margin — no routing redesign required due to identical 15-mil insulation wall form factor.
Available Product Pages — UL 3266 by Market and AWG
Select a product page below for market-specific specifications, pricing guidance, and export documentation details:
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