UL 3271 Motor Lead Wire
UL AWM Style 3271 is an XLPE-insulated single-conductor wire construction, rated 125°C, 600 Vac and 750 Vdc, with a confirmed Use of motor leads or internal wiring of appliances. This page is built for buyers who have already identified that a motor-lead or motor-component BOM requires UL AWM Style 3271, and who now need to define the exact conductor size, insulation-wall requirement, and construction details to request an accurate quotation. UL Style 3271 covers a conductor range of 30 AWG through 2000 kcmil — this page explains how the Style’s requirements apply across that range, rather than presenting one single AWG as the product.
The Confirmed UL 3271 Construction
| Parameter | UL 3271 |
|---|---|
| UL AWM Style | 3271 |
| Description | Single conductor with extruded insulation |
| Conductor Range | 30 AWG – 2000 kcmil, solid or stranded |
| Temperature Rating | 125°C |
| Voltage Rating | 600 Vac / 750 Vdc |
| Flame | Horizontal flame |
| Insulation | Extruded XLPE, thickness tiered by conductor size — see table below |
| Optional Layer | Extruded or non-extruded semi-conductive polymeric layer over conductor |
| Marking | General; tags may optionally indicate 2500 V peak — for electronic use only |
| UL-Defined Use | Motor leads or internal wiring of appliances |
XLPE Insulation Wall by Conductor Size
UL Style 3271’s minimum XLPE insulation thickness is not a single figure across the Style — it increases in defined brackets as conductor size increases. Specifying the correct wall thickness for your required conductor size is one of the most consequential steps in a UL 3271 RFQ:
| Conductor Size Group | Min. Average Thickness | Min. Thickness at Any Point |
|---|---|---|
| 30–9 AWG | 30 mils | 27 mils |
| 8–2 AWG | 45 mils | 40 mils |
| 1 AWG – 4/0 AWG | 55 mils | 50 mils |
| 213–500 kcmil | 65 mils | 58 mils |
A buyer requesting a 250 kcmil UL 3271 motor lead is specifying a different insulation-wall requirement than a buyer requesting 8 AWG or 1 AWG — these are not interchangeable constructions, and a quotation for one conductor size cannot be assumed to apply to another. This page does not convert these figures into an invented finished outside diameter; conductor geometry, including finished OD, is order-specific and depends on the actual conductor size and construction ordered.
Motor Leads or Appliance Internal Wiring — The Confirmed Use Boundary
UL Style 3271’s confirmed Use is motor leads or internal wiring of appliances. This page does not extend UL 3271 into general industrial internal wiring, control-cabinet wiring, or panel-side lead work as a separate application category beyond the confirmed motor-lead and appliance-internal-wiring use. Where a motor lead genuinely connects motor terminals within an industrial motor assembly, that falls within the confirmed use; “industrial motors” describes a commercial context in which this Style is specified, not a separate UL certification claim.
Conductor Size Does Not Establish Motor Current, HP, or kW
This page does not publish generic ampacity figures, motor horsepower ratings, or kilowatt ratings tied to specific AWG or kcmil sizes, and does not infer motor current capacity from conductor size or the 600 Vac / 750 Vdc voltage ratings — these are separate parameters determined by motor design. Current-carrying suitability, motor HP, motor kW, and motor insulation class depend on the actual motor design, conductor construction, ambient conditions, and installation, and must be evaluated by the buyer’s engineering process rather than assumed from this page.
Optional Semi-Conductive Layer
UL Style 3271 permits an optional extruded or non-extruded semi-conductive polymeric layer over the conductor. This is an order-specific, optional feature across all conductor sizes within the Style — not a default component of every UL 3271 motor lead. If your motor design requires this layer, state it explicitly in your RFQ.
VFD and PWM Applications: Confirm Separately
UL 3271’s 600 Vac and 750 Vdc figures are the Style’s rated voltage limits — they do not by themselves establish VFD suitability or PWM voltage-spike performance for a variable-frequency-drive-fed motor. If your project involves a VFD-driven motor, confirm your actual circuit voltage, PWM characteristics, and any shielding requirement separately; this page does not make VFD-specific or PWM-specific performance claims beyond the confirmed Style rating.
Conductor Form, Material, Termination and Connectors: RFQ Fields
UL Style 3271 permits solid or stranded conductor construction; conductor material and plating are not established by the Style data across any conductor size. This page does not describe UL 3271 as a fixed bare-copper or tinned-copper product — if your BOM or drawing specifies a conductor material, plating, terminal, connector, or termination process for the motor lead, include that in your RFQ so the corresponding construction can be confirmed.
What UL 3271 Does Not Automatically Define
The Style data does not automatically define: conductor material, conductor plating, strand count, strand diameter, lay length, conductor resistance, ampacity, current rating, motor horsepower, motor kW, motor insulation class, finished OD, bend radius, flexibility class, flex-cycle rating, VFD suitability, PWM suitability, terminal compatibility, connector compatibility, colour, reel length, MOQ, stock availability, or lead time. These remain RFQ, BOM, or ordered-construction parameters where relevant.
Building a Complete UL 3271 Motor Lead RFQ
To request an accurate quotation, please provide:
- UL AWM Style 3271
- Conductor size
- Solid or stranded
- Conductor material, if controlled
- Conductor plating, if controlled
- 125°C requirement
- 600 Vac requirement
- 750 Vdc requirement
- Motor-lead use
- Required XLPE wall according to conductor-size group
- Optional semi-conductive layer required or not required
- Insulation colour
- Nominal or maximum finished OD, if controlled
- Terminal or connector information
- Cut length and tolerance, if applicable
- Quantity
- Reel or packaging requirement
- Destination
- Documentation requirements
Applicable RoHS / REACH documentation can be confirmed according to the ordered construction.
See our UL 3271 XLPE Wire category, our XLPE Wire range, or our AWM Wire category for related constructions.
