Hi,
Does anyone know what are winding / ratio specs for this clamp? Does it have an internal burden resistor?
I've measured as much as 9VAC coming from it connected to a kitchen heater, so definitely gonna need a voltage divider, but I'd like to know the max first...
Update: I found the manufacturer, but the winding/ratio isn't listed 
CT234-30M-LA
Its rated for 75 ohm load resistor. But you can vary this to change the sensitivity (the winding is 510 ohms from the spec). Clearly if a few amps puts it at 7V is doesn't contain a burden resistor - its rated for 80 amps or so.
Thanks for the reply,
I've just measured resistance on the clamp terminals, reads 375 Ohms...
I'm unfamiliar with the transformer winding resistance calculation, so I was wondering why it's not 510 Ohms, any clue?