Standard American NEC code states all line sources must have properly sized fuse or circuit breaker disconnects.
For personal use in your home there are giant grey areas though relating to custom control devices.
Inspection is not needed if you meet the proper safety requirements relating to amp capacity, voltage, grounding and physical shielding.
Personally I recommend that everyone that does any home wiring or custom modifications of home appliances or electrical systems or just has an electrician over in general get the most current NEC code book.
They get printed every three years and cost around $40 on line if you know where to shop.
Its money well spent and if you do need work done by an electrician it will save you far more than $40 the first time you can call BS on some thing they say you need done that is not required by the code book! That happens a lot!
I have personally found far too many professional electricians that do not even own a current issue code book let alone know how to properly look up and use information from one!
Rather scary when I learned that!