Description
Product Overview
Speller’s Large Ceramic Wire Connector is engineered for extreme heat environments where traditional plastic connectors fail. Made from high‑grade porcelain ceramic, each connector features a sharp tapered thread that twists securely onto the wire, providing a metal‑free, melt‑resistant joint. Rated for 1000°F (540°C) and compliant with cULus standards, these connectors are ideal for applications above 200°F. The pack includes 20 large‑size connectors suitable for 18‑8AWG wire, offering a reliable, reusable solution for industrial and scientific projects.

Usage
These connectors excel in high‑heat scenarios such as furnace wiring, automotive exhaust systems, HVAC coil splicing, and industrial equipment maintenance. Their ceramic construction ensures no degradation when exposed to flame or hot surfaces, making them perfect for electricians, HVAC technicians, and DIY enthusiasts working on projects that exceed the limits of plastic terminals. Use them to join wires in engines, ovens, or any setting where temperature stability is critical.
Why Choose Us
Speller combines decades of expertise in electrical components with rigorous quality testing to deliver connectors that stand up to the toughest conditions. Each connector undergoes UL verification and is manufactured with precision casting to guarantee uniform thread geometry and consistent performance. Our commitment to durability means fewer replacements, lower downtime, and confidence in safety‑critical installations.
Key Features
- Ultra‑high temperature rating up to 1000°F for reliable performance in extreme heat.
- Ceramic construction eliminates metal coil, preventing melt and corrosion.
- Sharp tapered twist thread provides a secure, tool‑free connection.
- Large size fits 18‑8AWG wire, matching standard red large connectors.
- Backed by Speller’s customer support and warranty for peace of mind.
FAQ
Can these connectors be used with wires larger than 8AWG?
They are optimized for 18‑8AWG (approximately 1.0 mm²) wire. Larger gauges may not achieve a proper twist fit and could compromise the connection.
Are the connectors reusable?
Yes, the ceramic material and twist design allow multiple installations, provided the threads are not damaged.
Do I need any special tools to install them?
No special tools are required; simply twist the connector onto the stripped wire end until it is snug.
Are these connectors UL listed?
They meet cULus specifications, ensuring compliance with North American safety standards.
What is the warranty period?
Speller offers a one‑year limited warranty covering manufacturing defects.




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