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Coiled 12-gauge high-temp wire with glass braid jacket

SUPCO

SUPCO 5 Foot Single Conductor Wire 12GA 450C Hi-Temp RP0512NG

SKU CH-DK0Z-63CKH

Five-foot 12-gauge single conductor wire rated for 450 °C and 300 V, with nickel-plated copper, mica insulation and glass braid for ovens, furnaces and industrial heat

  • TypeConductor Wire
  • Rated for 842 °F continuous heat with 450 °C insulation
  • 12 AWG nickel-plated copper carries 56 A at 104 °F ambient
  • 300 V rating supports 13 kW at 240 V or 6.5 kW at 120 V
  • Mica core plus glass braid jacket resists abrasion and sharp bends
  • Five-foot single-conductor length suits oven, furnace and industrial repairs

High-temperature appliance wire

This 5-foot single conductor wire is built for ovens, ranges, furnaces and industrial equipment that operate up to 450°C. The 12 AWG nickel-plated copper conductor carries up to 56A at 40°C and is rated for 300V. UL and CSA approval confirms it meets recognised safety standards for high-heat installations.

Heat-resistant construction

Mica-based insulation and a glass braid outer jacket protect the conductor from sustained temperatures of 842°F without degrading. The materials remain stable during normal heating cycles in cooking and heating appliances. No active cooling is required because the wire itself is rated for the environment.

Ready for retrofit repairs

The 5-foot length suits custom appliance repairs and heater element connections where factory leads have failed. Installers must use high-temperature rated terminals and avoid sharp bends against metal edges. Power must be disconnected before any work begins.

Highlights

  • Rated for 842 °F continuous heat with 450 °C insulation
  • 12 AWG nickel-plated copper carries 56 A at 104 °F ambient
  • 300 V rating supports 13 kW at 240 V or 6.5 kW at 120 V
  • Mica core plus glass braid jacket resists abrasion and sharp bends
  • Five-foot single-conductor length suits oven, furnace and industrial repairs

Specifications

TypeConductor Wire

Questions about this item

How do I install this 12 AWG single conductor wire, and what is the most common mistake?

Disconnect power first. Use 300 V rated high-temperature terminals and connectors. The step often missed is avoiding sharp bends or abrasion against metal edges, which can damage the mica insulation and glass braid jacket.

What maintenance or replacement will this RP0512NG wire need over time?

Inspect the glass braid cover periodically for fraying or brittleness caused by prolonged exposure near the 450 °C limit. Replace the wire if the mica core insulation shows cracking or if the nickel-plated copper conductor becomes corroded or damaged.

At what point does the 56 A ampacity limit become the restricting factor under sustained load?

The 56 A rating applies at 40 °C ambient. Under sustained use, if the surrounding temperature rises above 40 °C, the safe current-carrying capacity drops below 56 A before the 450 °C conductor temperature limit is reached, making ampacity the first limit.

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