No, that is the 'load' for the Current Transformer. The output of the Current Transformer is more a current than a voltage. With that burden resistor, the output becomes more a voltage than a current.
A Current Transformer is much safer and more reliable that a hall-current-sensor.
Click on "Building Blocks", and explore the pages, that site is a good source of information for mains and power measurements.
They assume that the mains is already connected to a load, and one of the mains wires is going through the Current Transformer. That page is only about the Current Transformer and how to use the signal from the Current Transformer.