Quote:
when you say 'dodgy' and 'electrical', should you then automatically say, 'I'll get a professional' ?


I live! (I've done some of this before, but it has been years, and I wanted to be appropriately skittish in the presence of mucho voltos.)

Anyhow, maybe not as dodgy as I thought: Hard to tell, but the shared common looks like it may be 12G and the Circuit B hot wire looks like 12G. And I figured out that also feeds the water heater. Still undersized, I thought, for 30A breaker, but maybe not. I'm amazed at how skinny wires can be and still meet code.

I also solved my problem without radical measures. I looked and saw "D'uh -- that's a big dual pole 220 breaker for baseboard heat in bedroom that I will *never* use." Popped that out, popped in a single 15 A breaker, and I now have dedicated 15A circuit for alarm system and computer closet. Now if I can just figure out how the heck to fish my dang phone line into this closet for DSL/alarm circuit, I'll be all set.
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Jim


'Tis the exceptional fellow who lies awake at night thinking of his successes.