AusLee
Electrical
- Sep 22, 2004
- 259
Hello,
I have a room with false ceiling, with HVAC ducted supply to diffusors but no ducted return: the plenum is used for this purpose.
NEC 300.22 (B) says i must use EMT tubes in this area, however i have PVC tubes that are marked "LSF, non-propagation of flame". Can i use those?
I have a room with false ceiling, with HVAC ducted supply to diffusors but no ducted return: the plenum is used for this purpose.
NEC 300.22 (B) says i must use EMT tubes in this area, however i have PVC tubes that are marked "LSF, non-propagation of flame". Can i use those?