The performance of transmission lines and cables subjected to electromagnetic radiation from a nuclear explosion (NEMP)

The use of armoured cables for telecommunication and data transmission systems is practically essential to avoid electromagnetic interference. The authors have made a mathematical study of the probable effect of a high altitude nuclear explosion. Using a simplified model, the voltages and currents induced into single and multiple-sheathed, overhead and buried cables subjected to an intense magnetic pulse (50kV/m) from high altitude, are determined by computer. It is found that, contrary to expectations the current intensity in the second case is seven times greater than for the overhead conductor. (F.N.S.)