G GHENAPAL New member Jul 17, 2008 #1 Hello! Does anybody know if a TVSS is required or recomended for commercial establishments by NEC?
480sparky Senior Member Location Iowegia Jul 17, 2008 #2 No. They're only required to be installed according to Art. 285 if they are installed.
dereckbc Moderator Staff member Location Plano, TX Jul 18, 2008 #3 It is a desgn issue, not a code issue.
