Recommend software for drawing wire layouts

[TLB]

ConceptDraw is a Visio-like program that is available on the Mac. I haven't used it for quite a while, but it used to have a very good building plan module that did a nice job with networking, plumbing, electrical and HVAC. Lot's of other project management tools you probably don't need, but you may want to download the trial version for a test run.