CT for current readings

[amesmich]

I have read some teams in the past have monitored current on motors. If so what CT (current transformer) or other device did you use? I was thinking that it may be a good idea to monitor total current draw and have the code throttle back before the 120a main trips out rendering the bot useless then it being too late. I am also curious as to what teams use to get an air pressure reading? What transducer. I know there are many but though some might have a favorite.
Thanks