UL 1592 FEP Wire 24 AWG · 200°C · 300V

UL 1592 FEP Wire 24 AWG — 200°C at 300 Vac in a Fine-Gauge Internal Wiring Construction

UL 1592 in 24 AWG is a single-conductor wire with extruded FEP insulation, rated 200°C maximum at 300 Vac with a horizontal flame rating, recognised for internal wiring. The insulation is specified at 16 mils minimum average thickness, 13 mils minimum at any point, applied uniformly across the style’s 32 AWG to 16 AWG range. At 24 AWG this style delivers a full 200°C temperature class in a conductor size and finished diameter appropriate to signal and sensor duty, rather than one dictated by a 600 V insulation requirement the circuit does not have. CableApex supplies UL 1592 24 AWG as a UL Recognized Component — file on record.

Conductor Options at 24 AWG: Tinned Copper Is Outside the Range

UL 1592 permits solid or stranded conductor across its full 32 AWG to 16 AWG span, but it places a specific limit on tinned copper: tinned copper conductor is recognised only in sizes 26 AWG through 16 AWG, and the tinned copper strands must be a minimum of 15 mils in diameter. A 24 AWG conductor is finer than 26 AWG, which places it outside that permitted window — tinned copper is therefore not available at this gauge under this style.

That is worth catching early, because tinned copper is a common default in fine-gauge specifications and the substitution is not one that can be made quietly at the production stage. Where the design requires tinned copper at 24 AWG, UL 1591 at 150°C recognises tin plated conductor across its whole 32 to 16 AWG range without a size restriction, and is generally the workable alternative if the application will tolerate the lower temperature class. Where the 200°C rating is genuinely needed at 24 AWG, the conductor must be specified as plain or otherwise treated copper rather than tinned, and the termination process planned accordingly.

Tinned Copper Availability by Gauge

UL 1592 24 AWG Specifications

200°C Without the 600 V Diameter

Most fluoropolymer styles that reach 200°C also carry a 600 Vac rating, and the insulation wall follows the voltage class rather than the conductor. UL 1330, for example, specifies 20 mils at this gauge to support 600 Vac. UL 1592 stays at 300 Vac and specifies 16 mils, which on a 24 AWG conductor produces a meaningfully slimmer finished wire. In a harness where a dozen sensor leads share a channel, that difference accumulates across the bundle. Where the circuit genuinely operates within a 300 V class, the thinner wall is a specification matched to the requirement rather than a reduction in margin.

Applications

Within its permitted use — internal wiring — UL 1592 24 AWG suits sensor and thermocouple extension leads, fine signal conductors and low-current control wiring routed through zones reaching 200°C where the circuit operates at 300 Vac or below. Because the permitted use is stated as internal wiring rather than being restricted to appliances, the style covers a broader range of equipment types than several of its FEP neighbours. Where tinned copper is required at this gauge, UL 1591 at 150°C is the alternative to consider. For applications outside internal wiring, confirm application suitability before specifying.

Key Features

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CableApex supplies UL 1592 24 AWG from 100 m per color and responds to B2B inquiries within 12 hours. Specify conductor construction (solid or stranded), conductor material, and colors through the form below. If tinned copper is required, state the gauge so the applicable style can be confirmed before the order is placed.

Related FEP styles: UL 1591 FEP Wire (150°C / 300 Vac, plated conductors) · UL 1330 FEP Wire (200°C / 600 Vac) · UL 1592 FEP Wire category

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