CT Series Current transformer indoor toroidal design. Supplied with 24 inch insulated secondary leads, terminated with crimped ring connectors. Suitable for use with bare (uninsulated) primary conductor in circuits up to 600 V (4 KV Hi pot); or at higher voltages when a suitably insulated conductor is used. All units have 5 A secondary for use with standard AC ammeters with 5 A movements. Two hole mounting bracket on all models. UL E227616 volume #1 file number X0DW2.