At least you know about the potential problem now and not after its closed in and you are wondering what went wrong.
I have only seen foam used on the TV shows (Holmes on homes, TOH, etc.) and did not know that it got that hot after application.
Is it possible to ring out the wire runs to see if they are bad before the drywall goes on? I was thinking if you had a bad run you could use something like a roto-zip to grove out a small channel to place a new low voltage line through the cured foam.
