Blasting wire is an electrical wire used to transmit current to an explosive detonator, initiating a controlled explosion.
Blasting wire provides the electrical path needed to safely activate explosive charges in mining, demolition, quarrying, and construction. It connects a blasting machine or power source to the detonator, delivering the impulse required for ignition. Designed for short-term conductivity, blasting wire is typically lightweight, inexpensive, and intended for single-use applications. Insulation is usually minimal, made from plastic or polymer materials sufficient to protect the conductor during setup. Conductors may be copper or steel, balancing performance and cost. Despite its simple construction, blasting wire plays a critical role in ensuring precise, safe detonation timing.
Blasting wire use is regulated in the United States by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and the Mine Safety and Health Administration (MSHA).
Blasting wire has been used since the 19th century with the development of electric detonators. Its design has remained simple and cost-effective, emphasizing reliability and safety in temporary blasting operations.