I have a quick question for the membership. When installing low voltage wire - plenum 2 conductor 18g speaker wire or 2 conductor 22g sheilded plenum wire - what are the guidelines for supporting the cables. ie: how far apart should a tie up hanger or support cable be installed to hold the wire above drop tile ceiling, 6' spread, 10' spread? etc And where in the code book is a chart or section on minimum distance spans for wire and cable. I've looked through the general sections and didn't see something that gave guidelines for cable support. Thanks in advance to everyone for your advise (what a wonderful forum I stumbled upon on the web).