The eGauge supports Rope CTs from three different manufacturers. In order to determine which CT to select, refer to the tables below.

For JD CTs (colored red) there will be a label located on the CT clip itself:

CT Labeling CT Identifier on eGauge Installation Page
JRFS 115 JD JRFS 115mm/4.53" 4085A
JRFS 190 JD JRFS 190mm/7.48" 4085A


For AE Accuenergy CTs (colored orange), there is a label located on the CT lead:

CT Labeling CT Identifier on eGauge Installation Page
RCT16-1000 AE RCT 106mm/4.17" 2775A
RCT24-1000 AE RCT 178mm/7.01" 2775A
RCT24-2500 AE RCT 178mm/7.01" 6935A


For the Magnelab CTs (colored green) there is a label located on the outside of the CT clip:

CT Labeling CT Identifier on eGauge Installation Page
RCT-1800-COIL ML RCT 152.4mm/6.00" 4800A
RCT-2400-COIL ML RCT 203.2mm/8.00" 4800A
RCT-3600-COIL ML RCT 279.4mm/11.00" 4800A


Note that eGauge no longer stocks Magnelab Rope CTs, but you may encounter them in the field (and the eGauge still supports them). They read very poorly below about 50A. If the CT features a separate calibration tag, this should be noted.

Additional CT types are supported - see our CT Selection Guide for a more comprehensive overview. Connecting CTs which do not meet requirements for supported CTs may result in reduced accuracy or damage to the eGauge.