UL 3321 XLPE Insulated Hook-up Wire (150°C / 600V)

UL AWM Style 3321 — XLPE Wire for Protected Appliance Internal Wiring

UL AWM Style 3321 is a single-conductor extruded XLPE wire for the protected internal wiring of appliances, covered under UL Subject 758, Section 3. The Style covers 30 AWG through 4/0 AWG at 150°C maximum, 600 Vac, and 750 Vdc. An optional treated or untreated braid covering is available within the Style scope. CableApex supplies UL AWM Style 3321 from factory production. UL AWM Style 3321 documentation is available for confirmed constructions on request. Marking and documentation depend on the qualified ordered construction.

UL AWM Style 3321 — Key Specifications

Typical Construction Data — Selected AWG Sizes

UL AWM Style 3321 covers 30 AWG through 4/0 AWG. The table below shows selected typical factory-supplied constructions within the 30–9 AWG insulation class (30 mils minimum average wall). Conductor stranding, outer diameter, and resistance figures are typical production values. Insulation wall thickness increases for conductor sizes from 8 AWG downward through 4/0 AWG — confirm wall class requirements for larger AWG sizes at the enquiry stage. Final conductor stranding, dimensions, optional braid, markings, packaging, and documentation depend on the confirmed order specification.

Applications — Protected Internal Wiring of Appliances

UL AWM Style 3321 is designated for the internal wiring of appliances. Cross-linked polyethylene insulation provides a higher temperature rating than common 105°C PVC constructions and offers thermal dimensional stability suitable for protected internal wiring in enclosed equipment assemblies operating in elevated-temperature environments. At 150°C maximum, 600 Vac / 750 Vdc, and across the 30 AWG–4/0 AWG conductor range, UL AWM Style 3321 constructions are typically evaluated for internal wiring inside enclosed appliance assemblies where the ordered XLPE construction meets the equipment thermal and voltage requirements. Application categories include:

• Protected internal appliance wiring inside enclosed equipment assemblies where a 150°C-rated XLPE construction is required by the equipment thermal design
• OEM internal lead wire connections inside enclosed appliance assemblies where the temperature class exceeds what 105°C PVC AWM constructions can support
• Internal wiring of enclosed electrical equipment where 600 Vac / 750 Vdc rated XLPE AWM wire and a wide conductor range (30 AWG–4/0 AWG) are specified
• Appliance internal wiring where the optional braid covering construction is required for additional surface reinforcement within the enclosed assembly

UL AWM Style 3321 is not designated for field wiring, building installation wiring, external cabling, or any use outside protected internal equipment wiring. Current-carrying capacity and thermal derating must be confirmed at the equipment design level and are not determined by the AWM Style file.

XLPE vs PVC for 150°C Internal Wiring — Selection Notes

The cross-linking process in XLPE creates a thermoset structure that retains dimensional stability at elevated temperatures where thermoplastic PVC compounds may soften. At the 150°C temperature class, XLPE is the appropriate insulation system within the PVC and XLPE AWM wire families available from this production scope. For internal wiring where the equipment thermal design permits a 105°C temperature class, UL AWM Style 1015 (105°C / 600 Vac or 750 Vdc, extruded PVC, 30 AWG–2000 kcmil) is available as a lower-temperature PVC alternative. For internal wiring where 125°C XLPE at 600 Vac or 750 Vdc is sufficient, UL AWM Style 3271 (125°C / 600 Vac or 750 Vdc, extruded XLPE, 30 AWG–2000 kcmil) should be evaluated. For 300 Vac internal wiring at 125°C XLPE, UL AWM Style 3266 (125°C / 300 Vac, extruded XLPE, 32–10 AWG) provides a thinner-wall alternative.

Direct Factory Supply — UL AWM Style 3321

• Direct factory communication: UL AWM Style 3321 XLPE wire is produced at the Yangzhou facility and supplied through CableApex for B2B export orders. XLPE extrusion capability and optional braid processing are available within the applicable Style scope.
• Custom colour and spool length: XLPE jacket colour and spool length produced to buyer specification. Standard colours: red, black, white, yellow, blue, green, brown, grey. Custom colours and spool lengths on request. MOQ 100m per colour.
• Optional braid: Treated or untreated braid covering is available as an optional construction within the UL Style 3321 scope. Confirm braid requirement at the enquiry stage.
• Flame test capability: Horizontal flame is the UL Style 3321 file requirement. Vertical flame testing can be provided according to the confirmed construction and order requirement — confirm at enquiry stage.
• Export documentation: Commercial Invoice, Packing List, Certificate of Origin (CCPIT), Bill of Lading provided as standard. UL AWM Style 3321 documentation available for confirmed construction on request. RoHS and REACH documentation available on request where applicable. HS Code: 8544.49.

Related UL AWM Styles — XLPE and High-Temperature Internal Wiring

Buyers evaluating UL AWM Style 3321 may also consider: UL AWM 3271 (125°C / 600 Vac or 750 Vdc, extruded XLPE, 30 AWG–2000 kcmil — lower-temperature XLPE alternative covering a wider conductor range for motor lead and appliance internal wiring); UL AWM 3266 (125°C / 300 Vac, extruded XLPE, 32–10 AWG, 15 mils min avg wall — lower-temperature lower-voltage XLPE alternative for fine-wire 300V internal wiring); and UL AWM 1015 (80–105°C / 600 Vac or 750 Vdc, extruded PVC, 30 AWG–2000 kcmil — lower-temperature class PVC alternative where 105°C is sufficient).

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