The primary voltage of a transformer is 240 volt. There is no over current protection on the secondary side of the transformer. Disregarding any exceptions, the primary side over current device shall be a maximum of what percent o f the rated primary current of the transformer?

The primary voltage of a transformer is 240 volt. There is no over current protection on the secondary side of the transformer. Disregarding any exceptions, the primary side over current device shall be a maximum of what percent o f the rated primary current of the transformer?