Patent ID: 7294997

Claim:
A power measuring system comprising: at least first, second and third electrical loads; at least first, second and third pairs of wires associated respectively with the first, second and third loads, the wires in the first pair being of a first color, the wires in the second pair being of a second color and the wires in the third pair being of a third color, the first, second and third colors being different from one another so that the respective pairs of wires are color coded for distinguishing the respective first, second and third loads; and an electrical metering device operative to measure a voltage and a current associated with each of the electrical loads, the electrical loads being external to the electrical metering device, the electrical metering device having at least first, second and third voltage input terminals and at least first, second and third current input terminals disposed on the electrical metering device so that the first, second and third current input terminal are associated respectively with one of said first, second and third voltage input terminals for defining first, second and third input terminal pairs, the voltage input terminal in each of said input terminal pairs being spaced from the associated current input terminal in the respective pair, the electrical metering device further having first, second and third colored regions formed between each of said respective pair of one of said voltage terminal and one of an associated current terminal and corresponding to the respective first, second and third colors of the wires, the first colored region being disposed on the electrical metering device to extend between the first voltage input terminal and the first current input terminal, the second colored region being disposed on the electrical metering device to extend between the second voltage input terminal and the second current input terminal and the third colored region being disposed on the electrical metering device to extend between the third voltage input terminal and the third current input terminal, whereby the first, second and third colored regions of the electrical metering device enable the wires of the respective first, second and third pairs of wires to be connected with a specified one of the first, second and third input terminal pairs for accurately measuring the voltage and the current for each of the first, second and third electrical loads.