Need help understanding how motors, sensors and other components of a prototype design factor into certifications for industry sale
First thing: It would be better to get an EMC consultant first, they can save you time and money (you'll spend somewhere between 2k and 10k USD on a normal product that is subject to IEC61010 and an FCC cert for unintentional radiator)
In the end it really depends on which certs you need. I'm assuming that you'll file as an unintentional radiator for FCC certification (anything with a radio is an intentional radiator). If you do that then you have to list most things that generate any kind of radio, the product needs to be tested to make sure it stays below certain limits.  It is desirable to pass this test the first time around since additional testing costs more. So make sure you do your homework on anything that might generate frequencies in the FCC ranges.
If your device is connected to AC mains it will probably be subject to IEC61010, which means that there are conducted immunity standards (the device can't inject noise back onto the grid, which could happen with switching noise from a motor) and it shouldn't be able to kill anyone with mains voltages.
There are also other saftey and ESD tests that are associated with different products (I don't know all of the standards so I recommend a real expert, get a consultant).