MOISTURE DETECTION WIRE, A MOISTURE DETECTION SYSTEM, AND A METHOD OF DETECTING MOISTURE

摘要

A water detector wire 1.002 for use in a power cable or building, the cable having a wire 1.004 with a water soluble insulating jacket 1.006 made of two or more components, wherein a first component has a first solubility in water, and the second component has a second solubility in water, the second solubility being less than the first solubility. The second component can be substantially insoluble. On exposure to water, the soluble insulation 1.006 dissolves at the location of the water exposing the wire 1.004. This can be detected when the wire is close to a return path such as a return wire 4.038 or a cable screen 13.232. The location of a fault can then be detected by measuring the linear resistance of the wire. Two such wires 3.006, 3.007 can be used together.