u/Gillingham

The main feed from the locked utility cabinet to my panels main breaker are flat busbar type connections. I simply disconnected the CT clamp top and it is managing to get data, but I worry about accuracy.

I did see that the CT 400A clamps are bigger and the same 3000:1 winding ratio, but I can't seem to find them online for less than $75 each which seems wayy to expensive.

Has anyone found larger or CTs that are shaped differently that are compatible with the shelly 3000:1 expected ratio?