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an update to this topic. The requirement for converting/using a dedicated N+E bonded generator was too much of a restriction. The isolation transformer approach gives us the most flexibility in this respect and is the chosen solution. Power demands are modest and a ~3kVA IP67 isolation...

No - no plumbing at all. It's a very rural old stone Scottish croft building with new-ish tin roof.

True - It's a stone outhouse but with with a tin roof.

interesting...using a step-up transformer as isolation transformer... something like 230v IT generator -> 110v step-down transformer -> inline 110v RCD -> cable to outbuilding ->230v step-up transformer -> CU (earth rod at CU, no RCDs) OR 110v IT generator->cable to outbuilding->230v...

Hi John, indeed - to eliminate doubt over the type of the generator used, we would specify the use of only generators with N-E link so that RCDs would work. Good point, removing the RCD at the building and siting solely at the generator might be our solution... re: concern over...

Ericmark, thankyou for your detailed reply. I think the only way to satisfy their requirement for flexibility in choice of generators is The isolation transformer as you point out, if cost were no issue. I can see your point that being unable to guarantee where a given generator is earth...

Hello, I would appreciate your comments on my proposed solution to supplying a stone outbuilding from a portable generator. I have read the numerous posts on this and other forums, and http://electrical.theiet.org/wiring-matters/39/portable-generators.cfm?type=pdf and distilled it all into...

Hi, it's because there are two different versions of the DT10RF controller "Digistat" which is a "24" hour timer - i.e. it only lets you set the TIMES of the central heating, then repeats it every day. "Digistat Optimiser" which is a "7 day" timer - for different settings depending on the...