UL 3071 200°C 600V Silicone Wire with 30 mil Insulation
UL AWM Style 3071 is a single conductor with extruded insulation, rated 200°C and 600 Vac, with a Horizontal flame rating. The Style covers conductor sizes from 18 AWG to 13 AWG in solid or stranded construction, insulated with extruded SR (silicone rubber) at 30 mils minimum average thickness and 27 mils minimum thickness at any point, with a covering specified as the same as for Type SF-2 (Fixture Wire UL 66). The official Use is Internal Wiring of Appliances.
This page addresses the insulation-wall side of Style 3071: buyers who are matching a drawing or bill of materials against the 30 mil minimum average SR requirement, and who need the wall requirement stated separately from the conductor, covering and marking items that are settled per order. Everything below is limited to what the Style record itself establishes; SKU-level values such as strand construction, finished outer diameter and conductor material are confirmed against the ordered construction rather than read off the Style.
Confirmed UL Style 3071 Construction and Ratings
| Parameter | Confirmed Style 3071 value |
|---|---|
| UL AWM Style | 3071 |
| Description | Single Conductor with Extruded Insulation |
| Temperature rating | 200°C |
| Voltage rating | 600 Vac |
| Flame rating | Horizontal flame |
| Conductor range | 18 AWG – 13 AWG |
| Conductor construction | Solid or stranded |
| Insulation | Extruded SR |
| Insulation thickness | 30 mils minimum average / 27 mils minimum at any point |
| Covering | Same as for Type SF-2 (Fixture Wire UL 66) |
| Marking | General |
| Use | Internal Wiring of Appliances |
| RoHS / REACH | Applicable RoHS / REACH documentation can be confirmed according to the ordered construction. |
Four points need clarification before this table is used as a purchasing specification. First, the insulation values are minimum requirements, not nominal or target dimensions, and they do not describe a finished wire diameter. Second, the conductor field states a size range and solid or stranded form only; it does not state conductor material, plating or strand construction. Third, the covering entry is a cross-reference to Type SF-2 fixture wire under UL 66 and is reproduced here exactly as the Style states it. Fourth, the Marking field reads General, which is a Style-level entry rather than a printed marking string for any particular order.
30 mil Minimum Average SR Insulation
The insulation requirement for Style 3071 is expressed as two independent values that must both be satisfied: 30 mils minimum average thickness, and 27 mils minimum thickness at any point. These are not the two ends of a tolerance band and they are not a nominal wall with a permitted deviation.
The minimum average value applies to the wall taken as an average across the measured cross-section. The minimum-at-any-point value applies to the single thinnest measurement found anywhere on that cross-section. A construction whose average wall meets 30 mils can still fail the requirement if any one point falls below 27 mils, and a construction that never drops below 27 mils at any point can still fail if the average does not reach 30 mils. Both conditions are checked; neither one substitutes for the other.
Two consequences follow for procurement documents. A drawing note that specifies only an average wall leaves the point requirement unstated, and a drawing note that specifies only a minimum wall leaves the average unstated. Where a buyer’s drawing controls the insulation wall, it should carry both values, and any wall requirement above the Style minimum is a buyer requirement that has to be stated in the RFQ rather than assumed from the Style.
The wall requirement also does not produce a finished outer diameter. Finished OD depends on the conductor actually used, on the covering, and on the specific ordered construction, so it is confirmed per order and not calculated by adding a minimum wall to a generic conductor diameter. For the same reason this page publishes no AWG-to-OD table, no conductor resistance table and no current-carrying values; none of those are established by the Style record.
18 AWG to 13 AWG Conductor Range
Style 3071 covers 18 AWG through 13 AWG, in solid or stranded construction. That is the complete extent of what the Style fixes about the conductor. It does not name a conductor material, it does not specify plating, and it does not define strand count, individual strand diameter, lay length, conductor diameter or conductor resistance.
In practice most of these are controlled by the buyer’s drawing rather than by the Style. Where the drawing calls out a conductor material or plating, a specific strand construction, a flexibility class, or a conductor diameter or resistance limit, those requirements belong in the RFQ and are confirmed against the ordered construction. Where the drawing is silent, the construction must be agreed before production rather than inferred from the Style number.
The range itself is narrower than several other AWM Styles, and a size outside 18–13 AWG is outside Style 3071 regardless of how closely the rest of the construction matches. A requirement for a size beyond that range is a different specification question and needs separate review rather than an assumption that the Style can be extended.
Type SF-2 Covering Reference
The Style record states the covering as: same as for Type SF-2 (Fixture Wire UL 66). That is a cross-reference to a separate requirement set, and this page reproduces it without translating it into a particular braid or coating construction. The applicable covering construction for a given order is confirmed against the qualified construction and the referenced requirement, not assumed from the Style entry alone.
No performance is attributed to the covering here. The Style record does not assign the covering any abrasion, mechanical protection, chemical resistance, moisture resistance, shielding or flexibility function, and it does not raise the temperature or voltage rating of the wire. Where a buyer needs the covering to satisfy a specific mechanical or environmental requirement, that requirement is evaluated separately and confirmed in writing.
200°C and 600 Vac Ratings
The confirmed ratings are 200°C and 600 Vac, together with a Horizontal flame rating. These are the rating values carried by the Style, stated without duty qualifiers; the Style record does not express them as continuous, continuous-duty or long-term service values, and no service life, thermal cycling count or thermal margin can be derived from them.
The flame rating is Horizontal flame. VW-1, FT1, vertical flame ratings and self-extinguishing or flameproof characterisations are not part of this Style record and are not claimed. Similarly, the 600 Vac rating is a normal working voltage rating for this Style; the Style record for 3071 carries no peak-voltage tag statement, so none is stated here.
Equipment-level temperature and voltage conditions remain an equipment question. A component Style rating does not by itself establish that the wire is acceptable in a particular hot zone, near a particular heat source, or in a particular circuit; that determination belongs to the equipment evaluation.
Internal Wiring of Appliances
The official Use for Style 3071 is Internal Wiring of Appliances. The page keeps that boundary intact, and it is the sentence that should be carried into any drawing note or component declaration referencing this Style.
The Use statement is not broadened here into motor leads, heating-element leads, oven or furnace leads, kiln wiring, ignition wiring, building wire, field wiring, branch circuits, tray cable, conduit wiring, portable cord, external wiring, automotive, aerospace, solar or EV wiring. None of those are established by the Style record, and a component Style never confers equipment-level compliance in any of them. Where an application sits outside internal appliance wiring, the correct route is a separate technical review rather than a broader reading of the same Style.
What Style 3071 Does and Does Not Define
Defined by the Style: the description (single conductor with extruded insulation), 200°C, 600 Vac, Horizontal flame, the 18–13 AWG conductor range, solid or stranded form, extruded SR insulation with 30 mils minimum average and 27 mils minimum at any point, the Type SF-2 covering reference, Marking as General, and the Use statement.
Not defined by the Style: conductor material and plating, strand count and strand diameter, lay length, conductor diameter and resistance, finished outer diameter and its tolerance, ampacity or current rating, bend radius, flex life, insulation colour, printed marking content, packaging, spool or reel length, order quantity, lead time, stock position and commercial terms. Each of these is an ordered-construction item.
Common Procurement Errors
Four errors recur on Style 3071 enquiries. Treating 30 mils as a nominal or exact wall, when it is a minimum average with a separate 27 mil point minimum. Calculating a finished outer diameter by adding the minimum wall to a generic conductor diameter, which produces a number the Style does not support. Assuming a conductor material or plating because silicone-insulated wire is often supplied one way, when the Style names none. And reading the Type SF-2 covering reference as a specific braid construction with assumed mechanical properties, rather than as the cross-reference the record states.
How to Specify UL 3071 in an RFQ
A quotable enquiry for this Style states: UL Style 3071; required AWG within 18–13 AWG; solid or stranded construction; conductor material and plating where controlled by drawing; insulation colour; marking requirements; the drawing or BOM against which the wire is being specified; documentation requirements; quantity; packaging; destination; and Incoterm.
Where the buyer’s drawing controls strand construction, conductor diameter or resistance, finished outer diameter or an insulation wall above the Style minimum, those values should be supplied with the enquiry so the construction can be confirmed rather than assumed. The Style data alone does not define strand count, finished OD, conductor resistance, ampacity, current rating, MOQ, lead time, price or stock availability. Pricing and commercial terms depend on the confirmed conductor size, conductor construction, insulation colour, marking, documentation, packaging, quantity, destination and Incoterm, and final terms are confirmed after RFQ review.
UL Marking and Documentation
Supplied wire is UL-recognized component wire where supplied under a qualified manufacturing scope, with UL marking according to the confirmed ordered construction. The Style record lists Marking as General, and applicable product marking should be confirmed according to the ordered construction.
Applicable RoHS / REACH documentation can be confirmed according to the ordered construction. CE, UKCA, CSA, FT1, VW-1, CPR, VDE, DIN, EN, IEC and dual UL/CSA designations are not claimed here unless separately supported for the ordered construction.
Commercial, origin, compliance and transport documents are identified during quotation and confirmed according to the order.
