Each loop contributes 5A worth of flux to the CT. Just like the number of turns in the primary of a transformer. So your reading should be 5A x # of turns.

That trick is done some times when the amperage is small so you can get a good reading on you meter. Just don't forget to divide the reading by the number of turns.

Of course you would read the multiplications of 5A in each more loop.

We all do the same for low current Clamp metering purposes. In the cases the metering current is too low for correct reading, we create generally ten loops in the clamps and we read the current ten times more. And later we divide what we read to ten. Because divider ten is easy for quick calculation, when you don't have a calculator nearby.

However coming to Current Transformer, this succestion is not correct. The matter is totally different.

Current transformers are special transformers. They built to ensure their magnetic cores to easily saturate just after 5 Amp. This is deliberately made in order to protect the needle pointers of the ampermeters suddenly to rise to hit to the endless and therefore to bent out.

This means that you can multiply the readings by making additional loops inside the CT. before you reach to 5 Amp reading. But you're limited when you reach 5 Amp. Because the core is magnetically saturated at this point.

Current Transformers are built under certain standards. Quick saturated ones are used for metering to protect the measuring instruments.

Semi quick saturated ones are built for overload breaking purposes. They release the breakers, and they permit some temporary overloads, such as transformer or motor demarraged starts.

To give an idea, Quick saturated CT's are saturating around 6-7 amps, since semi quick CT's saturate around 15-30 Amps.

However in general, the CT's are built to saturate, after the rating, indicated on their label. Check the label on the CT if for quick saturation or more.

Kindest Regards