Outer diameter of the AC cable should be smaller than the holes diameter of the CT, so
that the AC cable can be routed through the CT.
To ensure accurate current detection, the CT cable is recommended to be shorter than
30m.
Do not use network cable as the CT cable, otherwise the smart meter may be damaged
due to high current.
The CTs vary slightly in dimensions and appearance depending on the model, but they
are installed and connected in the same way.