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Split core CTs can be extended with twisted pair wire to cover much longer distances. STP (shielded twisted pair) is recommended, as it will reduce noise and interference. If you need to extend a CT wire farther than approximately 100 ft (30m), contact eGauge support to see if a custom factor will be necessary in your software settings.
Note that CT leads longer than approximately 100ft (30m) can cause a decrease in accuracy. This is especially true of CTs with high maximum amperage ratings which are reading extremely low amperages.
eGauge typically recommends 600V rated CAT 5 Ethernet cable, as it is generally easy to obtain and can be used to extend up to 4 CTs. However, any shielded twisted pair wire with appropriate insulation and wire gauge can be used. Be certain to use twisted pair wire that is appropriately rated for the location and panels it will be run in.
Connections should be made with solder and heat shrink tubing. A terminal block may also be used. Wire nuts should not be used to extend CT leads.
Please see the CT selection guide for full details regarding CTs.