[sdiy] Mysterious Transformer Wire

[Paul Perry]

>Are power transformers ever made with a wire that doesn't connect to any of
>the windings, neither primary nor secondary?
>
Possibly a ground shield.
Which would have connected to a foil that ran between the primary &
secondary windings.
A foil that does NOT form a loop, naturally.
To stop mains noise getting through via capacitive leakage.

paul perry Melbourne Australia