UL 1332 FEP Insulated Wire — 200°C / 300V Fluoropolymer AWM
Extruded FEP Insulation for High-Temperature and Chemically Aggressive Internal Wiring
UL Style 1332 is a single-conductor appliance wiring material (AWM) insulated with extruded FEP (Fluorinated Ethylene Propylene), rated for 200°C continuous operation at 300V AC. Recognized under UL Subject 758, the style covers conductor sizes from 30 AWG to 10 AWG in solid or stranded configurations. An optional outer layer of extruded FEP or treated glass braid extends the listing to include oil resistance at 80°C and optional gasoline-resistant marking. CableApex supplies UL 1332 wire as a UL Recognized Component — file on record — meeting the full dimensional and performance requirements of UL 758 AWM.
UL 1332 Specification Summary
- Style Number: UL 1332
- Temperature Rating: 200°C continuous
- Voltage Rating: 300V AC
- Flame Rating: Horizontal flame
- Optional Ratings: Oil resistant at 80°C; gasoline resistant
- Conductor Range: 30 AWG – 10 AWG, solid or stranded round
- Insulation Material: Extruded FEP (Fluorinated Ethylene Propylene)
- Min. Insulation Wall: 13 mils average / 12 mils at any point (≈ 0.33 mm / 0.30 mm)
- Optional Covering: Extruded FEP ≥ 2 mils, or glass braid ≥ 7 mils
- UL Status: UL Recognized Component — file on record
- Intended Use: Internal wiring of appliances; optional 600V peak for electronic use
Conductor & Dimension Reference
| Gauge (AWG) | Cross-Section (mm²) | Stranding | Ins. Wall (mm) | Nom. OD (mm) | Max. Resistance (Ω/km) |
|---|---|---|---|---|---|
| 28 AWG | 0.08 | 7/0.12 | 0.33 | 1.00 | 239.0 |
| 24 AWG | 0.20 | 7/0.20 | 0.33 | 1.25 | 94.2 |
| 20 AWG | 0.50 | 19/0.20 | 0.33 | 1.65 | 36.7 |
| 16 AWG | 1.31 | 19/0.30 | 0.33 | 2.15 | 14.6 |
Typical Application Environments
The combination of 200°C thermal stability and near-universal chemical inertness gives UL 1332 FEP wire a decisive performance advantage across several demanding installation types:
- Industrial ovens and furnaces: Lead wiring that remains inside the heated chamber must hold its dielectric strength at sustained 200°C. FEP does not degrade, crack, or soften within this range, unlike PVC or standard XLPE grades.
- Chemical processing equipment: FEP resists concentrated mineral acids, alkalis, aromatic solvents, oxidising agents, and hydrocarbon fuels simultaneously — a combination no thermoplastic alternative can fully replicate.
- Gas appliance ignition systems: With the optional gasoline-resistant marking, UL 1332 is listed for use in proximity to fuel and vapour environments in certified gas range and burner wiring.
- Medical and laboratory instruments: The non-porous, non-absorbing FEP surface withstands autoclave sterilisation cycles, disinfectant wipe-downs, and repeated solvent cleaning without surface embrittlement or swelling.
- Semiconductor and vacuum equipment: FEP’s extremely low outgassing rate and zero plasticiser content make it compatible with cleanroom and vacuum-chamber environments where even trace contamination is unacceptable.
UL 1332 vs Related Fluoropolymer and Silicone Styles
Buyers shortlisting wire for 200°C service routinely evaluate FEP, PTFE, PFA, and silicone options side by side. The table below covers the four UL AWM styles most frequently compared against UL 1332:
| UL Style | Insulation | Temp | Voltage | Key Characteristic vs UL 1332 |
|---|---|---|---|---|
| 1332 (this page) | FEP | 200°C | 300V | Broadest chemical resistance; non-porous surface; optional oil / gasoline rating |
| 1659 | PTFE | 250°C | 600V | +50°C headroom; double the voltage rating; superior abrasion resistance |
| 10362 | PFA | 250°C | 600V | Combines FEP-level flexibility with PTFE-level temperature and voltage tolerance |
| 3135 | Silicone | 200°C | 600V | Higher voltage rating; greater flexibility at low temperatures; lower unit cost |
All UL 1332 wire supplied by CableApex is produced under active UL Follow-Up Service as a UL Recognized Component — file on record. Each production reel carries the UL Recognized Component mark in accordance with UL Subject 758 marking requirements. Full recognition documentation is available on request for purchasing, compliance, or import customs purposes.
Order Information
Minimum order quantity is 100 metres per colour per gauge. Quotations are returned within 12 hours of enquiry. Please indicate AWG size, quantity, colour, and preferred delivery port in the form below.
