Profile: Spark-On Engineers produces lapp group products, which includes cables, cable glands, accessories and connectors. Our TC overload relays are provided with a differential tripping system, which ensures tripping under single phasing & unbalanced voltage conditions. Our copper screen braided, number coded control offers protection from power cables by eliminating propagation of electromagnetic flux. Our twisted pair data transmission cables are twisted in pairs, which significantly reduce crosstalk and interference between the cores within the cable.