oegnic
Segregation by housecode makes it a little easier to remember when you have a large number of modules. For example, using our home:
All standard house lighting is HCs A and B, house code C is for motors and transformers. House code D is all inside and outside accent lighting. House code E is for motion sensors and a miscellaneous catch all. House code F is for "virtual switches, which are unit codes that will trigger some automated event and then reset to off after the event. House code G is for "permissives" which are unit codes which must be "ON" before the system will provide automatic control. i.e "Coffee Enable" must be ON before the coffee maker will automatically brew on week day and week end schedules.
etc. etc. etc.
These examples will make no sense to you or anybody else, but the point is; segregation by house code is a good organizational tool, and will make sense only to the person doing the planning. Bear in mind, two years from now you will look at it and say "why did I do it that way?" or at least I do.