Job complete.

Pulled the back cover off and checked the windings ... not VOV.

Spike in the ground below the changeover DB ... found the earth wire connected to the copper pipes not even secured ... cleaned up the copper and fitted new bonding strap and lugs to the wires.

Tested the voltage at the plug ...

V-N 237
L-E 237
N-E couple of milliamps

All good ... I am happy with the setup and will make it the standard for our small generator connections going forward.

Sent all the photos etc to the AIA for our area ... we all set to go.

Stripped my Yamaha (contractors type) to check the connection ... that a another thread on its own.