Thanks for your posts Trumpy. I'll mark my abacus for two weeks. I have left a message for Bill at the Energy Safety Service to call me on Monday about it.
I've an idea that this case may depend on whether the switchboard is a main or a sub. The board in question was originally meant to be a main with an E/N link but it may actually have ended up connected to a sub-main and had the E/N link removed.
Perhaps with back-up generators becoming more common here the Ministry of Economic Development could publish a guideline on the connection of these.
