Lizard1977: I'm not sure what the wiring is in the original part of the house. In the newer part, I think it's white sheathed cabling, but I've never really looked.
Ok. The white modern stuff is called TPS (Tough Plastic Sheath). The older black rubber stuff is called TRS (Tough Rubber Sheath) this is the stuff that's a fire hazard because the rubber can become brittle and crumble away. Our house has the latter.