UL 3266 XLPE Wire

UL 3266 is a cross-linked polyethylene (XLPE) insulated wire rated 125°C and 600V AC under UL AWM Style 3266, produced under UL Follow-Up Service File No. E333030. UL 3266 is the mid-range XLPE grade — rated 35°C above UL 3271 (90°C) — and is the standard specification for motor lead connections on Class F (155°C winding temperature) and Class H (180°C winding temperature) motors where the elevated winding temperature classification requires higher-rated conductor insulation at the motor terminal connection point than standard 90°C XLPE can provide.

The 125°C rating of UL 3266 is also the specification of choice for motor leads, panel internal wiring, and equipment connections in high-ambient-temperature industrial environments — particularly in hot climates where motor terminal box ambient temperatures of 60–90°C under full load leave insufficient thermal margin with 90°C rated wire. For the highest-temperature XLPE grade, see UL 3321 (150°C). For standard ambient motor leads, see UL 3271 (90°C). Available in 30 AWG to 2000 kcmil, RoHS and REACH compliant.