UL 3266 XLPE Wire — 125°C / 300V, Horizontal Flame — Motor Lead Wire México
Style 3266 is the 125°C crosslinked polyethylene wire within UL Subject 758 — a compact thin-wall construction that delivers a significant thermal upgrade over PVC-insulated hook-up wire without increasing overall wire diameter. At 15 mils minimum average XLPE wall across the 32–10 AWG certified range, Style 3266 matches the physical dimensions of Style 1007 and 1569 PVC wire while raising the continuous temperature rating from 80–105°C to 125°C. This combination of compact form factor and elevated thermal capability makes it the preferred internal wiring specification for motor leads, pump winding connections, and high-ambient enclosure wiring where PVC constructions approach their thermal limits under sustained operating loads.
For Mexican motor manufacturers, pump equipment importers, and automotive component OEMs, Style 3266 provides UL-recognized 125°C performance in a wire format compatible with standard harness assembly tooling and conduit fill calculations designed for 15-mil wall wire — no redesign of routing paths or connector hardware required when upgrading from PVC to XLPE in the same AWG.
Technical Specifications — UL Style 3266
| Parameter | Value |
|---|---|
| UL Style | 3266 |
| UL Subject | 758, Section 3 |
| Temperature Rating | 125°C |
| Voltage Rating | 300 Vac |
| Flame Rating | Horizontal flame |
| AWG Range | 32 AWG – 10 AWG, solid or stranded |
| Conductor | Solid or stranded copper |
| Insulation Material | Extruded XLPE (crosslinked polyethylene) |
| Insulation Thickness | 15 mils min average / 13 mils min at any point |
| Typical Use | Internal wiring (cableado interno — alambre para motor) |
| Optional Marking | 600 Volts Peak — For Electronic Use Only |
| Available Colors | Black, white, red, yellow, green, blue, brown, orange (custom on request) |
| Standard Spool Length | 100 m / 200 m / 305 m |
| MOQ | Contact for quote — consultar cotización |
Motor Lead Applications — Alambre para Motor en México
Style 3266’s 125°C XLPE construction serves a distinct set of internal wiring applications where standard PVC wire thermal ratings are insufficient under continuous motor operating conditions:
- Automotive component motor leads — winding lead wires in small DC and AC motors used in automotive seat adjustment mechanisms, window lift actuators, HVAC blower motors, and cooling fan assemblies manufactured by Tier 1 and Tier 2 automotive suppliers in San Luis Potosí and Ciudad Juárez, where motor winding temperatures under continuous operation reach 110–120°C and exceed the safe operating range of 105°C-rated PVC wire.
- Industrial pump motor internal wiring — stator winding leads and terminal connection wires in centrifugal and submersible pump motors used in water treatment, irrigation, and industrial process fluid handling systems across Hermosillo and Sonora’s agricultural and mining sectors, where motor enclosure temperatures under sustained high-load pumping cycles require 125°C-rated wire at the terminal connection points.
- Compressor and refrigeration motor leads — internal winding leads in fractional and integral horsepower hermetic compressor motors in commercial refrigeration equipment where motor winding temperature under peak load cycles approaches the 125°C thermal boundary, and where the compact 15-mil XLPE wall allows routing through the same motor terminal connection geometry designed for standard hook-up wire.
- Electronic equipment internal wiring at elevated ambient — static internal wiring paths in industrial computers, power conversion equipment, and electronic motor drives installed in high-ambient enclosures across México’s semiconductor and electronics manufacturing facilities in Ciudad Juárez and Tijuana, where enclosure internal temperatures under full computational load reach 100–115°C and require 125°C-rated wire for reliable long-term operation.
Engineering Notes — XLPE vs. PVC at 125°C: The Crosslinking Difference
What crosslinking does to polyethylene: Standard polyethylene (PE) thermoplastic softens and flows above approximately 90°C — making it unsuitable for sustained high-temperature wire insulation without modification. Crosslinking (the “XL” in XLPE) creates covalent chemical bonds between adjacent polymer chains, converting the thermoplastic PE into a thermoset material that maintains its dimensional and dielectric integrity at 125°C continuous without softening or deforming. This fundamental material transformation — not a simple compound additive — is what enables the 125°C rating of Style 3266 in a 15-mil wall construction that would fail thermally in standard PE or PVC at the same wall thickness.
Same 15-mil wall as Style 1007 and 1569 — direct form-factor compatibility: The 15-mil minimum average insulation wall of Style 3266 is identical to Style 1007 (80°C / 300V PVC) and Style 1569 (105°C / 300V PVC) in the 32–10 AWG range. This means outer diameter, conduit fill characteristics, grommet compatibility, and connector housing fit are effectively equivalent between these styles at identical AWG — enabling a direct thermal upgrade from PVC to XLPE without any mechanical redesign of the harness routing or termination hardware. For Mexican motor manufacturers standardizing on 15-mil wall wire across multiple temperature classes, this form-factor consistency simplifies BOM management significantly.
300V rating — confirming adequacy for motor lead use: Style 3266 is rated 300 Vac. For motor leads in single-phase 220V and three-phase 380V motors common in Mexican industrial applications, the 300V rating provides the following margins: for 220V AC motors, peak voltage reaches approximately 311V — marginal against the 300V rating and warrants careful engineering review. For 380V three-phase systems, peak line voltage reaches approximately 537V — exceeding the 300V rating. For 380V three-phase motor applications, Style 3271 (125°C / 600V XLPE) is the correct specification. Style 3266 is appropriate for 120V and lower-voltage motor lead applications where the 300V rating provides adequate safety margin.
Electronic use marking for rectified DC circuits: The optional 600 Volts Peak marking makes Style 3266 suitable for internal wiring in rectified DC power supply circuits operating at peaks above 300V but below 600V peak — expanding its applicability to electronic motor drive internal wiring and switch-mode power supply secondary circuits in industrial equipment manufactured or imported into México.
Related UL Styles for Comparison
UL 3266 125°C motor lead buyers commonly cross-reference: UL 3271 (125°C / 600V XLPE, same temperature class with higher voltage rating for 380V three-phase motor lead applications), UL 3321 (150°C / 600V XLPE, higher temperature motor lead for more demanding thermal environments), UL 1007 (80°C / 300V PVC, same 15-mil wall form factor at lower temperature rating), and UL 3666 (105°C / 600V XLPE, intermediate temperature at higher voltage class).
Request a Quote — Solicitar Cotización
Submit your AWG, color, spool format, and annual volume estimate below. Our bilingual team responds with a formal cotización within 24 business hours. Wire samples available for motor qualification testing upon request.
