UL 3271 250 kcmil XLPE Motor Lead Wire
UL AWM Style 3271 250 kcmil XLPE wire, rated 125°C, 600 Vac and 750 Vdc, is a large-conductor configuration within Style 3271’s broader 30 AWG–2000 kcmil range, used as a motor lead or for internal wiring of appliances. This page is built around the 250 kcmil SKU specifically — its confirmed insulation-wall requirement and RFQ specification fields. 250 kcmil represents this page’s SKU; it is not presented as universally required for any particular motor size, horsepower, current, or power rating. Actual conductor sizing must follow the buyer’s approved engineering design, BOM, and end-product requirements.
The 65/58 Mil Insulation Bracket: What Distinguishes 250 kcmil
UL Style 3271’s XLPE insulation-wall requirement is tiered by conductor size, and 250 kcmil falls within the Style’s 213 kcmil–500 kcmil bracket: 65 mils minimum average thickness and 58 mils minimum thickness at any point. This is a distinct bracket from the smaller-conductor pages in our UL 3271 range — our UL 3271 8 AWG and UL 3271 10 AWG Motor Lead Wire pages use a 45/40 mil requirement (8–2 AWG bracket), and our UL 3271 1 AWG Motor Lead Wire page uses a 55/50 mil requirement (1 AWG–4/0 AWG bracket). Buyers moving between conductor sizes within Style 3271 should confirm which insulation bracket applies to their specific size rather than assuming one wall thickness carries across the entire Style. This page does not convert the 65/58 mil figure into an invented finished outside diameter; conductor geometry, including finished OD, is order-specific.
The Confirmed UL 3271 250 kcmil Construction
| Parameter | UL 3271 |
|---|---|
| UL AWM Style | 3271 |
| Description | Single conductor with extruded insulation |
| Featured Conductor Size | 250 kcmil |
| Style 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, 65 mils min. average / 58 mils min. at any point (213–500 kcmil group) |
| 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 |
Motor Leads or Appliance Internal Wiring — Not Transformer Leads or Harness Services
UL Style 3271’s confirmed Use is motor leads or internal wiring of appliances. This page does not describe UL 3271 as a transformer-lead product, and does not position CableApex as providing harness-assembly or harness-production services on this page — this is a wire-construction product page, not a harness-service listing. Where a 250 kcmil lead genuinely functions as a motor lead within the buyer’s equipment, that falls within the confirmed Use; broader industrial wiring or transformer applications should be evaluated against the applicable requirement for that specific use, not assumed to be automatically covered by this Style.
250 kcmil Does Not Establish Motor Size, Current, or Power Rating
This page does not publish a generic ampacity figure, motor horsepower rating, or kilowatt rating simply because the product is 250 kcmil, and does not infer motor size or current capacity from the 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 accordingly rather than assumed from conductor size alone.
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 — not a default component of every UL 3271 250 kcmil wire. 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, PWM voltage-spike performance, or shielding requirements 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.
Conductor Form, Material, Termination and Lugs: RFQ Fields
UL Style 3271 permits solid or stranded conductor construction; conductor material and plating are not established by the Style data. This page does not describe UL 3271 250 kcmil as a fixed bare-copper or tinned-copper product — if your BOM or drawing specifies a conductor material, plating, terminal lug, connector, or termination process for the motor lead, include that in your RFQ so the corresponding construction can be confirmed.
Common RFQ Gaps for UL 3271 250 kcmil Motor Leads
Certain specification fields are frequently left out of an initial enquiry and typically require a follow-up before an accurate quotation can be issued. These are common information gaps, not observations about any particular buyer: UL 3271 and 250 kcmil are specified but conductor form is omitted; a buyer assumes the 55/50 mil wall used for 1–4/0 AWG instead of the correct 65/58 mil wall for 250 kcmil; conductor material is not specified; plating requirement is omitted; maximum OD is omitted; the semi-conductive layer requirement is unclear; terminal or lug information is missing; current capability is assumed only from 250 kcmil; VFD suitability is assumed because the product is called a motor lead; a cut length is supplied without a tolerance; or packaging requirement is missing. Resolving these details reduces quotation and construction mismatch.
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 HP, motor kW, motor insulation class, finished OD, bend radius, flex-cycle rating, VFD suitability, PWM performance, shielding, terminal compatibility, connector compatibility, standard colour, reel length, cut-length tolerance, MOQ, stock, lead time, or production capacity. These remain drawing, RFQ, or ordered-construction parameters where relevant.
RFQ Checklist for UL 3271 250 kcmil XLPE Motor Lead Wire
To request an accurate quotation, please provide:
- UL AWM Style 3271
- 250 kcmil
- Solid or stranded
- Conductor material, if controlled
- Conductor plating, if controlled
- 125°C requirement
- 600 Vac requirement
- 750 Vdc requirement
- Motor-lead application
- 65/58 mil XLPE insulation requirement (confirmed for 250 kcmil)
- Semi-conductive layer required or not required
- Insulation colour
- Nominal or maximum finished OD, if controlled
- Terminal / lug type
- Connector information
- Termination method
- Cut length, if applicable
- Cut-length tolerance
- Quantity
- Reel or packaging requirement
- Destination
- Documentation requirements
Applicable RoHS / REACH documentation can be confirmed according to the ordered construction.
See the UL 3271 XLPE Wire category, our XLPE Wire range, or our AWM Wire category for other conductor sizes within this Style.
