UL 5335 Mica Wire — 450°C / 600V, Nickel Shield Option — High-Temperature Power Wiring México
Style 5335 represents the peak specification within the UL Subject 758 mica wire family — 450°C continuous temperature rating combined with 600V insulation class, in a conductor range spanning 22 AWG through 4/0 AWG. No other single-conductor AWM style within Subject 758 simultaneously delivers both the 450°C thermal ceiling and the 600V dielectric rating. For Mexican heavy industry equipment importers and industrial electrical contractors serving the steel, aluminum, and high-temperature process sectors, Style 5335 is not a specialty option — it is the definitive wire specification when the internal wiring environment demands the absolute maximum from both the thermal and voltage performance of the wire insulation system.
The optional multi-conductor assembly configuration and the comprehensive shield material selection — nickel, nickel-coated copper, nickel-chromium-iron, or stainless steel 304 — extend Style 5335’s applicability to shielded instrumentation and power cable assemblies in environments where electromagnetic interference, chemical attack, and extreme temperature coexist simultaneously. CableApex exports this flagship mica wire specification to Mexican industrial buyers with full UL documentation and technical support for application specification.
Technical Specifications — UL Style 5335
| Parameter | Value |
|---|---|
| UL Style | 5335 |
| UL Subject | 758, Section 5 |
| Temperature Rating | 450°C |
| Voltage Rating | 600 Vac |
| Flame Rating | Horizontal flame |
| AWG Range | 22 AWG – 4/0 AWG (solid or stranded 22–8 AWG; stranded only above 8 AWG) |
| Conductor | Solid or stranded copper |
| Insulation System | Mica with glass braid |
| Insulation — 22–12 AWG | Mica 23 mils min avg + Glass braid 5 mils min avg |
| Insulation — 11–4 AWG | Mica 27 mils min avg + Glass braid 10 mils min avg |
| Insulation — 3–4/0 AWG | Mica 32 mils min avg + Glass braid 15 mils min avg |
| Optional Assembly | Multi-conductor cabled, max OD 1.500 inches; mica glass binder and/or fiberglass fillers; overall treated glass braid |
| Optional Shield | 36–30 AWG Type “A” Nickel / 27% min nickel-coated copper / nickel-chromium-iron / stainless steel 304 |
| Typical Use | Internal wiring where protected from mechanical abuse (cableado interno de alta potencia y temperatura extrema) |
| Available Colors | Natural mica/glass (standard); custom on request |
| Standard Spool Length | 50 m / 100 m |
| MOQ | Contact for quote — consultar cotización |
Flagship High-Temperature Applications — Precio Competitivo para Industria Pesada en México
Style 5335’s 450°C / 600V dual-peak specification serves the most thermally and electrically demanding internal wiring applications in México’s heavy industrial sectors:
- Electric arc furnace auxiliary system wiring — internal wiring for electrode regulation system controls, furnace transformer secondary bus monitoring circuits, and slag door actuator power leads in electric arc furnaces operated by steel minimill and specialty steel producers across Colima’s Pacific coast industrial port zone and Michoacán’s steel processing corridor, where furnace operating temperatures at the internal wiring routing positions reach 350–450°C and the high-current power circuit voltages require 600V insulation integrity simultaneously — the precise combination that only Style 5335 provides within the UL AWM family.
- Aluminum electrolytic cell internal wiring — anode stub connection monitoring leads, bath temperature sensor circuits, and cell control system internal wiring in aluminum electrolytic reduction cells operated in primary aluminum smelting facilities, where the combination of 960°C bath temperature creating 400–450°C wire surface temperatures at the measurement circuit routing positions and the 600V cell bus voltage requirements defines the dual 450°C / 600V specification boundary that Style 5335 is engineered to address.
- High-temperature industrial kiln drive and control wiring — main power leads for kiln rotation drive motors and high-temperature zone control circuits in large rotary kilns used for lime burning, magnesium oxide production, and mineral calcination across Sinaloa and Michoacán’s mining and minerals processing industries, where kiln shell proximity creates sustained 300–450°C wire surface temperatures at internal power circuit routing positions requiring the full 450°C / 600V specification of Style 5335.
- Induction melting furnace power circuit wiring — internal power leads and coil connection wiring in medium-frequency induction melting furnaces used for ferrous and non-ferrous metal casting operations across México’s foundry sector in Jalisco and Guanajuato, where the induction coil thermal environment creates 400°C+ wire surface temperatures at the coil terminal connection points while the 600V medium-frequency power supply output requires 600V-rated insulation on all internal power circuit wiring in the coil connection zone.
Engineering Notes — Peak Specification and Shield Material Selection
Why 450°C + 600V is uniquely demanding: Within UL Subject 758, multiple mica wire styles reach 450°C (5107, 5128, 5334, 5335, 5359, 5360, 5476) and multiple styles reach 600V (5107, 5335, 5359, 5476). However, the intersection of 450°C AND 600V in a single-conductor construction is covered by a smaller subset. Style 5335 explicitly certifies this combination across a wide AWG range from 22 AWG to 4/0 AWG, making it the most broadly applicable 450°C / 600V mica wire specification. When designing high-temperature industrial equipment internal wiring where both parameters simultaneously apply — common in electric arc furnaces, aluminum smelters, and induction melting systems — Style 5335 eliminates the specification compromise required when using lower-rated styles.
Insulation wall scaling to 4/0 AWG: Style 5335 extends the AWG range to 4/0 AWG — the heaviest conductor size available in this mica wire group. At 3–4/0 AWG, the mica layer builds to 32 mils minimum average and the glass braid to 15 mils minimum average. The overall wire outer diameter at 4/0 AWG with the full insulation build is substantial — confirm terminal lug bore sizing, conduit fill capacity, and bending radius constraints in the specific equipment enclosure layout before specifying 4/0 AWG Style 5335 in a new design. In heavy industrial furnace installations where 4/0 AWG current capacity is needed at 450°C, the physical size of the insulated wire assembly is a critical installation planning factor.
Nickel and nickel-alloy shield options — when and why: Style 5335 offers the most comprehensive shield material selection in the mica wire family — nickel, nickel-coated copper, nickel-chromium-iron (Nichrome-type), and stainless steel 304. Each material has specific advantages at extreme temperature: pure nickel retains mechanical properties and oxidation resistance above 450°C better than copper alloys; nickel-coated copper provides a cost-effective alternative where nickel surface properties are needed without full nickel conductor cost; nickel-chromium-iron alloys (Inconel-type) provide the highest oxidation resistance in harsh industrial atmospheres at elevated temperature; stainless steel 304 provides adequate corrosion resistance at lower cost for applications where Inconel-grade performance is not required. Select the shield material based on the specific chemical and thermal environment of your application — not all shield materials perform equivalently at 450°C.
Multi-conductor assembly for power cable applications: The multi-conductor assembly option — up to 1.500 inch maximum OD — enables Style 5335 conductors to be assembled into high-temperature power cable constructions for applications requiring multiple power circuit conductors in a single routed assembly. In electric arc furnace and induction melting applications where multiple power leads must be routed from the power supply to the furnace electrode or coil assembly through a single high-temperature routing path, a multi-conductor assembly reduces the number of individual cable runs and simplifies the routing through high-temperature structural penetration points.
Related UL Styles for Comparison
UL 5335 buyers commonly cross-reference: UL 5334 (450°C / 300V composite mica glass, lower voltage class for instrumentation and control circuits in the same temperature environment), UL 5476 (450°C / 600V mica tape, alternative 450°C 600V construction with revised insulation thickness requirements), UL 5107 (200–450°C / 600V mica tape, broader temperature range alternative covering both 200°C and 450°C rated builds), and UL 5359 (200–450°C / 600V mica tape multi-conductor, for multi-conductor high-temperature cable assembly applications).
Request a Quote — Solicitar Cotización
Submit your AWG, shield material specification, optional assembly configuration, spool format, and annual volume estimate below. Our bilingual team responds with a formal cotización within 24 business hours. Wire samples and application engineering support available upon request.
