by "normal?"
There are 2 ways to take a backup with Oracle :
1. Using RMAN to make a flat file dump of your database, then use a standard backup policy through NetBackup to back up the dump location as a flat file.
2. Create a policy type of "Oracle" in NetBackup which will take a hot backup of your database using the RMAN script you created.
Between those two, I'm not sure which one you would consider "normal."