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Introduction Exothermic welding is most commonly used for permanently joining copper conductors. It is the only acceptable means of bonding copper to galvanized cable. It can also be used on stainless steel, cast iron, steel, brass, bronze, and more. If joining two dissimilar metals, exothermic welding is a good option. You'll find Exothermic welding under the names of Such as SEFCO The SEFCOWELD Process SEFCOWELD exothermic welding is a cost efficient method of making large or small numbers of high quality electrical connections. It is a simple, self-contained system that uses the high temperature reaction of powdered copper oxide and aluminium, with in a mould, to form permanent electrical connections. Typical applications include: - Earthing for power plants and substations - Telecommunications - Transmission and power distribution lines - Grounding Lightning - Cathodic protection - Rail connections The SEFCOWELD System: - Requires no external power or heat source - Creates high quality electrical connections - Is completely portable - Can be used safely with - Used in traditional exothermic welding. The SEFCOWELD Connection SEFCOWELD connections have several adventages: - Tolerant to repeated fault currents - Highly conductive - Excellent corrosion resistance - It has a superior electrical conductivity than the conductors themselves. - It does not corrode oxide or degrade with time and is resistant to galvanic coupling. - It is able to withstand repeated electrical discharges. - It never increases its resistance. - It has higher mechanical and squeezing resistance than the conductors themselves. - It offers a permanent welding and a low resistance connection, essential for achieving longwearing and trustworthy results in earthings