Check section 725 of the National Electrical Code. Class 1 (CL1) wire must be rated 600V. But I don't think your application is Class 1. That is a high power signal application. Your cable may be able to qualify as CL2 or CL3, both of which do not require a conduit. If you must run the cable in a riser between floors then an "R" or "P" suffix is required. If the cable runs in a air handling space (plenum) then the cable must have a "P" sufix.
Richard Woods Sensormatic Electronics [email protected] Views expressed by the author do not necessarily represent those of Sensormatic. > ---------- > From: Eric Henning[SMTP:[email protected]] > Reply To: Eric Henning > Sent: Saturday, June 27, 1998 5:20 AM > To: [email protected] > Subject: signal wire 300V 600V? > > We supply a piece of cabling between one of our fluid measurements > meters (electronics with a remote sensor). One wire supplies 45Vdc and > three other wires are for signal level. our instruction book states > this bundeled cable must be installed > in conduit. all wires used are used well within their specs. > > my question is, if this wire is run in its own conduit can it be rated > 300V? An inspector in Oregon is telling me it has to be 600V wire as he > is calling it Cl I wire. > > Any thoughts would be appreciated. > > eric > [email protected] >
