Hi to all ,

I am using a Dossena digital volt / amp meter DVA1QE , and request assistance in choosing a CT that will allow me to read 0-20 amps . any help would be greatly appreciated .

 

I assume this is to read power line current.
Just choose a CT rated for 20A connected to the proper burden resistor.
You read the burden resistor voltage and calculate the current from that, based upon the CT turns ratio.
Or can directly read the CT current with an AC ammeter. Just make sure you never open circuit the CT while it has current going through the primary.