I am concerned about the use of dodgy phone-plugs for CT connections…
My understanding from the IoTaWatt sales site is that one of the standard CTs supplied is an Echun ECOL09-50 . Its datasheet makes no mention of any internal protection diodes.
Thus if one were to unplug a CT from the IoTaWatt box while a significant current was flowing in the primary, thousands of volts could be produced at the plug, potentially causing breakdown of the CT’s secondary insulation, and flash-over at the phone plug.
Have I missed something here?