Connecting AC and DC grounds on breadboard

Hi Guys

i believe we can connect ac and dc grounds together on a breadboard irrespective of the voltages. this is because there is no current in the ground pins. As long as we dont connect neutral of power supply (120V), i think we are fine.

please correct me if I am wrong.

i am connecting micro controller, motors , driversand power supply (120v ac) grounds together on bread board.

What type of motors are u using? ac or dc?

You can usually connect grounds, but it may cause problems if you get a fault,
when large currents can flow in the ground line.
Certainly don't have high voltage connections on the breadboard.