A little off the actual question, I guess, but I'm confused about the actual building. Is this one(1) building or two(2)? If they are physically attached in any way above ground they are a single building. Why are there 2 services? Or am I reading this wrong?

Sorry, brain fade I guess. I see the situation now. But still, you can't feed house lighting from one service if it penetrates the other living space. That's what the firewall is there for to begin with.

[This message has been edited by Gregtaylor (edited 03-07-2005).]