Cadweld 250 Welding Material Cartridge Weld System

Product Description

The CADWELD 250 is an exothermic welding material cartridge used to create permanent, molecularly bonded electrical connections. Exothermic welding produces a connection with conductivity equal to or greater than the conductors being joined, making it a standard method for grounding and bonding applications. The 250 cartridge contains the weld metal charge required for a single weld shot and is designed for use within the Cadweld system of molds and accessories. Electrical contractors and grounding specialists are the primary installers of this product.

This welding material cartridge is suited for grounding electrode system (GES) installations, lightning protection bonding, and utility grounding work in both residential and commercial applications. It is used wherever a permanent, corrosion-resistant electrical bond is required between conductors or between a conductor and a grounding electrode such as a ground rod, structural steel, or water pipe. The F20 designation referenced in the product data indicates a specific weld metal formulation within the Cadweld system.

Key Features

• Exothermic weld process creates a permanent molecular bond between conductors
• F20 weld metal formulation for specified conductor and electrode combinations
• Single-shot cartridge format for consistent, repeatable weld output
• No external power source required - reaction is self-contained
• Produces a connection that resists corrosion and mechanical loosening over time

Compatibility

Designed for use within the Cadweld exothermic welding system, including compatible Cadweld graphite or semi-permanent molds rated for the F20 weld metal formulation and the 250 weld metal charge size.

Installation Notes

Exothermic welding must be performed by a qualified electrician or grounding specialist following applicable NEC requirements for grounding and bonding. All conductors and mold surfaces must be clean and completely dry before initiating the weld reaction. Keep the weld area clear of flammable materials and use appropriate personal protective equipment including face shield and gloves. Never alter or repackage the weld cartridge, and follow the mold manufacturer's handling instructions for the specific mold type being used.