I think you should be asking this question to them whoever recommended you to complete PSY practical hours. I dont know the coursework in Nepal... its kind of hard to tell you without knowing the classes you have already taken so far. This is important issue to you.. please find authentic person get the answer... In these types of issues, you should not relying on the answer from just a person...   verify everything before stepping.

Here in Nursing school, we take General Psychology or College psychology, and Human Development...  only two classes. Other than that... we take good amount of load in Psychiatric nursing... and we do clinical hours at a psychiatric hospital.

You mentioned psychiatric practical hours... I am assuming that must be clinical hours in psychiatric hospital...   But, please find the answer from authentic personnel.