Basic Wire Gauge Standard

Hi,
Looking for a standard on the wire gauge for wiring of the sensors and ignition coils and injectors.
Have seen some people saying 22gauge for sensors and 18 for injectors and coils but nothing concrete. Is there a motec drawing outlining the gauges for each?
Much appreciated
Damien
Looking for a standard on the wire gauge for wiring of the sensors and ignition coils and injectors.
Have seen some people saying 22gauge for sensors and 18 for injectors and coils but nothing concrete. Is there a motec drawing outlining the gauges for each?
Much appreciated
Damien