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Coiled 25-foot spool of 14-gauge nickel-plated copper high-temperature wire with mica insulation

SUPCO

SUPCO 25 ft 14GA Hi-Temp Wire RP2514NG

SKU CH-1GVE-K7BR1

High-temperature 14-gauge nickel-plated copper wire rated 842°F for ovens, dryers and furnaces

  • Product typeConductor Wire
  • Withstands 842 °F for oven and furnace wiring
  • Nickel-plated copper conductor resists corrosion at 450 °C
  • 14 AWG gauge carries 45 A for heavy-duty circuits
  • 25 ft length suits appliance and HVAC runs
  • Mica insulation rated 300 V for safe high-heat installs

High-temperature appliance wire

The SUPCO RP2514NG is a 25 foot 14 gauge single conductor wire built for ovens dryers furnaces and other high heat equipment. Nickel plated copper conductors and mica insulation handle continuous temperatures up to 842 degrees Fahrenheit or 450 degrees Celsius. It is rated for 300 volts and up to 45 amps making it suitable for demanding residential and commercial heating circuits.

Sustained heat performance

The wire maintains its electrical integrity at the full 842 degree rating without the insulation degrading or becoming brittle over time. Nickel plating on the copper resists oxidation that would otherwise increase resistance during long heating cycles. Mica insulation does not melt or off gas even when the surrounding appliance runs at maximum temperature for extended periods.

Installation practicalities

Power must be disconnected before any work begins and only high temperature rated terminals and connectors should be used with this wire. Sharp bends and contact with metal edges can damage the mica insulation so routing should follow gentle curves and use protective grommets where the wire passes through chassis holes. The 14 gauge conductor is stiff enough to hold shape but still requires care to avoid nicking the insulation during stripping.

How it compares

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Price $35.99
Pricier than about 85% of the 2,144 comparable items (median $20.99).

Specifications

Product
Product typeConductor Wire

Questions about this item

Will the mica insulation and nickel-plated copper stay safe at the full 842°F rating when the wire runs continuously in a furnace?

Yes, the mica high-temperature insulation is rated for 842°F (450°C) and the nickel-plated copper conductor handles up to 45 A at 300 V without degrading under constant heat.

What terminals or connectors rated for 842°F do I already need to terminate this 14 AWG high-temp wire?

You need high-temperature ring or spade terminals and crimp connectors that are also rated for at least 842°F (450°C) to match the wire’s mica insulation and 300 V rating.

Can I splice this 14 AWG 842°F wire directly to the original 14 GA leads on my older oven without changing the breaker?

Yes, the 14 AWG nickel-plated copper carries the same 45 A / 10 kW capacity as the factory leads, so the existing 300 V circuit and breaker remain unchanged.

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