Which CT is a split-core?

• A. Both
• B. Production CT
• C. Neither
• D. Consumption CT

Answer: (D)

A split-core current transformer is a clamp-on device that opens to clip around an existing conductor without disconnecting it. This design is especially handy for measuring how much electricity a building consumes, because you can simply clamp around the live feed in a panel or on a feeder while everything stays energized. In contrast, PV production measurement is often done with fixed, non-split cores inside equipment or on conductors that aren’t easily opened, so those CTs aren’t typically split-core. So, the CT used to monitor household consumption is the split-core type.