Watsonlinc™ — Innovation in Flux

Cable clamp ammeters have long been used to read current in single wires and unbalanced currents in twin cables and the like. When reading around a twin cable, a twin and earth house wiring cable for example, the reading progressively diminishes the more equal the currents are in the line and neutral wires. Once the currents are actually in balance (the fault free condition) then the meter will read zero.