# Identifying Rope CTs

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

**eGauge branded CTid rope CTs** (ERA-106-xxxx) are not meant to be manually set and should be scanned using the CTid function accessed from the eGauge Installation Settings page. For more information please see: [Configuring CTid enabled sensors](https://kb.egauge.net/books/egauge-meter-configuration/page/configuring-ctid-enabled-sensors).

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

<table align="center" id="bkmrk-ct-labeling-ct-ident" width="300"><thead><tr><th width="120">CT Labeling</th><th width="180">CT Identifier on eGauge Installation Page</th></tr></thead><tbody><tr><td width="120">JRFS 115</td><td width="180">JD JRFS 115mm/4.53" 4085A</td></tr><tr><td width="120">JRFS 190</td><td width="180">JD JRFS 190mm/7.48" 4085A</td></tr></tbody></table>

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

<table align="center" id="bkmrk-ct-labeling-ct-ident-0" width="300"><thead><tr><th width="120">CT Labeling</th><th width="180">CT Identifier on eGauge Installation Page</th></tr></thead><tbody><tr><td width="120">RCT16-1000</td><td width="180">AE RCT 106mm/4.17" 2775A</td></tr><tr><td width="120">RCT24-1000</td><td width="180">AE RCT 178mm/7.01" 2775A</td></tr><tr><td width="120">RCT24-2500</td><td width="180">AE RCT 178mm/7.01" 6935A</td></tr><tr><td>RCT36-2500</td><td>AE RCT 271mm/10.67" 6935A</td></tr></tbody></table>

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

<table align="center" id="bkmrk-ct-labeling-ct-ident-1" width="300"><thead><tr><th width="120">CT Labeling</th><th width="180">CT Identifier on eGauge Installation Page</th></tr></thead><tbody><tr><td width="120">RCT-1800-COIL</td><td width="180">ML RCT 152.4mm/6.00" 4800A</td></tr><tr><td width="120">RCT-2400-COIL</td><td width="180">ML RCT 203.2mm/8.00" 4800A</td></tr><tr><td width="120">RCT-3600-COIL</td><td width="180">ML RCT 279.4mm/11.00" 4800A</td></tr></tbody></table>

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](https://kb.egauge.net/books/egauge-meter-configuration/page/ct-selection-guide "CT selection guide") for a more comprehensive overview. Connecting CTs which do not meet [requirements for supported CTs](https://kb.egauge.net/books/ac-and-dc-cts/page/supported-ct-types "Supported CT types") may result in reduced accuracy or damage to the eGauge.

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