How to wire and test an isolation transformer

[RaymondR]

I suspect the neutral to ground connection came about when they used star connected, multi phase, generators where the sum of the voltages at the common node is zero for the phase voltages but could be above ground level so they grounded all neutrals to achieve a common base voltage in a multi input system.

[barryglewis]

Jedi, please continue to post your diagrams etc on the forum!

Barry Lewis

[Colin Stone]

Waking up this thread.
My Jemelelc UK transformer has the following connections:

L, N and E on the input connector. E is connected to the core shield

L, N and E on the output connecter. N and E linked together.

Then case E connection joining main case and lid.

Case is mounted on insulating strips so no part of the case touches boat metal.

So, shield to shore E. And case E to where??? Shore or boat???