If you're in an older house built when appliances were not as numerous, and has not been updated, this is easy to do. The fact that they mention "fuses" may be

If you're in an older house built when appliances were not as numerous, and has not been updated, this is easy to do. The fact that they mention "fuses" may be innocent ignorance, or maybe the house really was served by fuses. Even in my ex-house built in 1964, we would often pop breakers if the wrong combination of stuff was turned on in the wrong combination of outlets.