UL 3573 200°C 10000V Ignition Wire for Gas Burner Systems

UL 3573 200°C 10000V Ignition Wire for Gas Burner Systems

This page covers UL AWM Style 3573, an insulated wire rated 200°C and 10000 Vac under the AWM Style system, built with an inner SR silicone insulation, a fiberglass braid or serve, and an outer insulation over that braid. It is written for appliance and burner OEM engineering and procurement teams whose drawing, BOM or ignition system specification calls for Style 3573.

The conductor range is 22 AWG–12 AWG, solid or stranded round, the flame designation is Horizontal Flame, and Marking is General. The official Use is specific to ignition service: “Electronic Ignition or similar application in Gas Ranges or Gas or Fuel Oil Burner Systems where protected from damage during handling, installation and servicing of the appliance.”

Two features of this Style deserve attention before any enquiry is prepared: the layered construction is defined in a particular way, and the high voltage rating belongs to the wire rather than to any ignition system it might serve.

Confirmed UL Style 3573 Construction and Ratings

Nine points to clarify about the table above:

1. The voltage rating is 10000 Vac. It is an AC rating for the wire, and the record gives no DC rating.
2. The inner SR silicone insulation carries two independent requirements: a 30 mil minimum average and a 27 mil minimum at any point.
3. The outer insulation over the braid carries only a minimum at any point, stated as 10 mils. The record publishes no minimum average value for that layer, and none is supplied here.
4. The braid entry permits a fiberglass braid or a serve. Which is used belongs to the qualified construction, so a braid is not assumed for every order.
5. The conductor is specified as round, solid or stranded, across 22 AWG–12 AWG. Sizes outside that range are outside the Style.
6. Conductor material, plating, strand count, strand diameter and lay length are not defined by the Style.
7. The flame designation is Horizontal Flame. No VW-1 or other vertical flame designation appears in the record.
8. Finished OD, OD tolerance, conductor resistance, bend radius and ampacity are not defined by the Style.
9. The Style range is not a stock list, and availability of a given construction is confirmed per enquiry.

The Layered Construction

Style 3573 is built up in three defined stages over the conductor. First, an inner SR silicone insulation meeting 30 mils minimum average and 27 mils minimum at any point. Second, a fiberglass braid or serve. Third, an outer insulation over that braid, with a minimum of 10 mils at any point.

The asymmetry in how those layers are specified matters in procurement. The inner insulation is controlled by both an average and a point minimum, while the outer layer is controlled only at its thinnest point. Quoting a minimum average for the outer layer would add a requirement the record does not contain, and treating the 10 mil figure as a nominal or typical outer wall would misread it in the other direction.

The braid entry is likewise a choice rather than a fixed feature: a fiberglass braid or a serve. Where a buyer’s drawing requires one specifically, that should be stated so the qualified construction can be confirmed. The record assigns the braid or serve no performance function, so no mechanical protection, abrasion resistance or dielectric contribution is claimed for it here. None of the three layers is described on this page with a thickness, material or property beyond what the record states, and the outer insulation material in particular is not named.

The 10000 Vac Rating

The Style voltage rating is 10000 Vac. It describes the wire, not an ignition system, a transformer output or an appliance circuit, so this page does not state that Style 3573 covers any particular ignition voltage, spark energy or transformer secondary rating. Those are equipment design matters determined against the appliance’s own specification.

The rating is also not restated as a DC value, and no peak, pulse or impulse figure is derived from it. The 200°C temperature rating is stated without a duty qualifier, so this page does not describe it as continuous, and derives no service life, thermal cycling count or thermal margin from it. The flame designation is Horizontal Flame; VW-1, FT1, vertical flame and fire-resistant descriptions are not part of this record.

Conductor Range and Construction

The Style covers 22 AWG through 12 AWG, solid or stranded round. Listings that show a wider span describe sizes the Style does not cover, and an enquiry built on such a listing will not match a qualified Style 3573 construction.

The Style does not define conductor material or finish, so copper, tinned copper, bare copper, nickel-plated copper and silver-plated copper are constructions a buyer may specify rather than properties this page can assert. Strand count, strand diameter, lay construction and any maximum conductor resistance are RFQ fields, and no stranding class or flexibility grade is applied here.

Conductor size assigns no circuit function or current capacity. The record gives no ampacity, and none is inferred from conductor size, the temperature rating or the voltage rating. Current-carrying capacity is evaluated through the buyer’s equipment design and the applicable approval process.

Official Use and the Protection Condition

The official Use is “Electronic Ignition or similar application in Gas Ranges or Gas or Fuel Oil Burner Systems where protected from damage during handling, installation and servicing of the appliance.”

Three elements shape how the Style is specified. The application category is electronic ignition or similar application, within gas ranges or gas or fuel oil burner systems. The condition is that the wire is protected from damage during handling, installation and servicing of the appliance, which is satisfied by the appliance design and assembly practice rather than by the wire’s own braid or outer layer. And the Use is bounded: this page does not extend it to general high voltage wiring, ignition coil or automotive ignition leads, X-ray, laser, electrostatic, plasma or high voltage power supply wiring, industrial furnace wiring, building wiring or field cable.

Buyers sometimes enquire from adjacent contexts, and an enquiry can always be reviewed against the drawing, but those contexts do not become approved uses. Compliance of a finished appliance or burner system is established at the equipment level and is not conferred by the Style designation of one internal wire.

How to Specify UL 3573

A Style designation is a construction requirement, not a complete purchase specification. A complete enquiry adds:

• the UL AWM Style 3573 requirement
• the AWG within 22 AWG–12 AWG
• solid or stranded round conductor
• conductor material and plating, where controlled by the drawing
• strand construction and maximum conductor resistance, where controlled
• whether a fiberglass braid or a serve is required
• insulation colour and any identification requirement
• the marking requirement
• maximum OD and OD tolerance, where controlled
• the ignition wiring location within the appliance or burner system, and how the wire is protected during handling, installation and servicing
• the drawing, BOM or equipment specification
• documentation requirements, quantity and packaging preference
• the destination and the requested Incoterm

No price, currency, pricing formula or price validity period is published on this page. A quotation is prepared against a defined construction and commercial scope and issued as a separate quotation document.

What Style 3573 Does and Does Not Define

Style 3573 defines:

• 200°C temperature rating and 10000 Vac voltage rating
• Horizontal Flame
• conductor range 22 AWG–12 AWG, solid or stranded round
• inner SR silicone insulation, 30 mil minimum average / 27 mil minimum at any point
• a fiberglass braid or serve
• outer insulation over the braid, 10 mil minimum at any point
• Marking: General
• the ignition Use and its protection condition

Style 3573 does not universally define:

• conductor material, plating, strand count, strand diameter or lay length
• a minimum average thickness for the outer insulation
• the outer insulation material
• a performance function for the braid or serve
• finished OD, OD tolerance, bend radius, flex cycles or flex class
• conductor resistance, ampacity or current rating
• a DC, peak or impulse voltage rating
• ignition system, transformer output or spark energy characteristics
• automotive ignition, high voltage power supply, X-ray, laser or industrial furnace suitability
• colour, reel length, MOQ, stock, lead time, production capacity or shipping term

Common Procurement Errors

• Writing “200°C continuous”, or adding a duty qualifier to the temperature rating.
• Restating 10000 Vac as a DC, peak or impulse value.
• Treating the wire rating as an ignition system, transformer or spark energy specification.
• Quoting a minimum average thickness for the outer insulation.
• Treating the 10 mil outer figure as a nominal or typical wall.
• Assuming a fiberglass braid when the construction may use a serve, or vice versa.
• Attributing mechanical protection or abrasion resistance to the braid or outer layer.
• Extending the conductor range beyond 22 AWG–12 AWG.
• Assuming the conductor is tinned copper, or that all Style 3573 is stranded.
• Deriving a finished OD from the minimum thickness values.
• Deriving ampacity from conductor size or the ratings.
• Presenting the wire for automotive ignition, high voltage power supply or industrial furnace wiring as an approved use.
• Relying on the construction instead of protecting the wire during handling, installation and servicing.
• Treating component Style recognition as appliance or burner system compliance.

RFQ Information to Confirm

Style and ratings

• UL AWM Style 3573 requirement
• 200°C temperature rating requirement
• 10000 Vac voltage rating requirement
• AWG within 22 AWG–12 AWG

Conductor and construction

• Solid or stranded round conductor
• Conductor material and plating requirement, if controlled by the drawing
• Strand construction, if controlled
• Maximum conductor resistance, if controlled
• Fiberglass braid or serve requirement
• Maximum OD and OD tolerance, if controlled

Identification and application references

• Insulation colour and identification requirement
• Marking requirement
• Ignition wiring location and the protection method during handling, installation and servicing
• The circuit requirement for engineering review, rather than a self-derived ampacity
• Drawing, BOM or equipment specification

Commercial

• Quantity and packaging preference
• Destination and requested Incoterm
• Requested UL marking and compliance documents, including any RoHS / REACH documentation requirement

UL Marking and Documentation

CableApex is an international sales and export company and does not hold a UL File for Style 3573. 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.

Applicable RoHS / REACH documentation can be confirmed according to the ordered construction. CSA, FT1, VW-1, CE and dual UL/CSA designations are not claimed here.

Commercial, origin, compliance and transport documents are identified during quotation and confirmed according to the order. They are not supplied as a fixed package with every shipment.

Related Categories

• UL 3573 Ignition Wire
• Silicone Wire
• AWM Wire