UL 5359 — The UL-Designated Multi-Conductor Mica Cable Style
Among the mica-insulated UL Recognized Styles produced by CableApex under File E333030, UL 5359 is distinct: it is the UL Style specifically designated for multi-conductor cable assemblies at the 200°C or 450°C / 600V class. While UL 5107, UL 5128, and UL 5335 each include “optional multi-conductor assembly” as a construction variation within their single-conductor listings, UL 5359’s listing is fundamentally multi-conductor: the Style describes bundled cable assemblies as the primary construction.
For German engineers searching UL 5359 450C Mica multi conductor wire Germany, this designation matters in the end-product UL Listing process. Equipment using UL 5359 as the multi-conductor cable references a Style whose listing language directly supports multi-conductor cable use — eliminating any UL evaluator question about whether single-conductor Styles’ “optional assembly” provision is being applied correctly.
UL 5359 Cable Construction
The UL 5359 listing specifies the following construction elements:
Individual conductors: 30 AWG to 4/0 AWG, mica with glass braid construction. Each conductor is independently mica-insulated and glass-braided per UL Subject 758 requirements.
Cable assembly: Two or more insulated conductors cabled together, with maximum overall diameter of 1.500 inches (38.1 mm). The cabling process holds individual conductors in fixed position relative to each other for the cable’s service life.
Binder and fillers: Mica glass binder is applied between individual conductors during cabling, with fiberglass fillers used as needed to maintain cable shape and conductor positioning.
Optional overall covering: Treated glass braid covering may be applied over the cable assembly, providing additional mechanical protection and presenting a unified outer surface for chassis routing.
Typical UL 5359 Multi-Conductor Configurations
2-3 conductor cables for thermocouple measurements — Type K, Type N, or Type J thermocouples in high-temperature equipment require 2-conductor measurement leads (millivolt signal level, but high-temperature exposure). UL 5359 2-conductor cable serves this with the 600V isolation envelope easily covering signal levels.
4-7 conductor cables for RTD and multi-channel instrumentation — 4-wire RTD measurements, multi-channel temperature monitoring in industrial furnaces, and similar applications use UL 5359 4-7 conductor cables. The bundled construction simplifies installation and ensures consistent thermal exposure across all measurement conductors.
3-conductor power cables for 480V three-phase circuits — High-power industrial heat equipment internal wiring requires 3-phase + ground configurations. UL 5359 3+1 conductor cables consolidate the four conductors needed for safe 480V three-phase distribution into a single cable assembly suitable for routing through high-temperature equipment zones.
10-30 conductor cables for multi-channel instrumentation — Large industrial heat equipment with extensive monitoring requirements (steel mill heat treatment lines, large industrial furnaces, glass production equipment with multiple temperature zones) use UL 5359 cables with 10+ individually insulated conductors bundled into a single cable.
UL 5359 Specifications
| Parameter | Value (per UL Subject 758) |
|---|---|
| UL Style | AWM 5359 |
| UL File Number | E333030 (Follow-Up Service) |
| UL Designation | Multi-conductor cable assembly |
| Individual Conductor AWG Range | 30 AWG – 4/0 AWG |
| Voltage Rating | 600V AC |
| Temperature Rating | 200°C or 450°C continuous |
| Individual Conductor Insulation | Mica with treated glass braid |
| Cable Assembly | 2 or more insulated conductors cabled together, max 1.500 inch (38.1 mm) overall diameter, with mica glass binder and/or fiberglass fillers |
| Optional Overall Covering | Treated glass braid (silicone varnish or TFE finish) |
| Flame Rating | Horizontal Flame per UL Subject 758 |
| Designated Use | Internal wiring of high-temperature equipment where not subjected to repeated flexing |
| Compliance | UL Subject 758 (AWM), RoHS, REACH |
| Marking | CableApex · UL AWM 5359 · Conductor Count + AWG · 600V · 200°C/450°C · E333030 |
Engineering Notes from CableApex
- “UL 5359 vs other Styles’ optional multi-conductor — which is better?” Functionally similar, but UL 5359 is the UL-designated Style for multi-conductor cable construction. For new equipment designs entering UL evaluation, specifying UL 5359 directly avoids any UL evaluator review of whether a single-conductor Style’s “optional assembly” is being applied correctly. For existing equipment designs with mature UL Listings that already specify a single-conductor Style’s optional multi-conductor variant, continuing with the existing specification is typically easier than re-evaluating to UL 5359. Both approaches produce valid UL Recognition.
- “How many conductors fit within the 1.500 inch (38.1 mm) max O.D.?” Depends on individual conductor AWG. For 18 AWG conductors (~3.5-4mm OD each), roughly 30-40 conductors fit. For 12 AWG (~5mm OD each), roughly 15-20 conductors fit. For heavier 4 AWG conductors (~9mm OD each), roughly 6-8 conductors maximum. For configurations needing more conductors than fit in a single cable, multiple parallel UL 5359 cable assemblies serve the application.
- “Cost economics of UL 5359 cable assembly vs individual conductors?” A 10-conductor UL 5359 cable typically costs around 9.5-10.5x the price of a single individual conductor at equivalent AWG (not 10x exactly, because cabling setup is shared across all conductors). The mica glass binder and optional overall braid add approximately 15-25% over the sum of individual conductor costs. For projects requiring multiple high-temperature circuits routed through the same path, the multi-conductor cable typically delivers lower installed cost than running individual conductors despite higher per-cable price.
MOQ, Packaging & Shipping
MOQ varies by conductor count, AWG, temperature class, optional covering, and production schedule. Multi-conductor cable production has higher setup cost than single conductor production. Standard packaging: spools or reels per customer specification, with larger spools required for cable assemblies. Export documentation: Commercial Invoice, Packing List, Certificate of Origin (CCPIT), Bill of Lading, UL Recognition reference letter (File No. E333030), RoHS Declaration, REACH SVHC Declaration, MSDS. HS Code: 8544.49. CIF Hamburg or Rotterdam, transit time 25–30 days from Shanghai or Ningbo origin port.
Related UL Mica Styles for Multi-Conductor Applications
UL 5359 buyers commonly cross-reference: UL 5476 (450°C / 600V mica + glass braid, 30-4/0 AWG — alternative multi-conductor mica construction), UL 5128 (450°C / 300V mica tape + glass braid, 24-4 AWG with optional multi-conductor assembly — lower voltage alternative), UL 5107 (200°C or 450°C / 600V mica + glass braid, 26-550 kcmil with optional multi-conductor — single conductor with multi-conductor option), and UL 5335 (450°C / 600V mica + glass braid, 22-4/0 AWG with optional multi-conductor).
