Hendrix
Senior Member
- Location
- New England
NEC article?
Its a 20 kw resi. gen set.You would first need to define control wiring. For Class 2 look at 725.136.
300.3(C) states all conductors must have same insulation ratings. This is a common violation with residential gen. systems we see. Many contractors use phone/thermostat type cables for the controls and run in the same conduit.
Class 1 circuits and power-supply circuits shall be permitted to occupy the same cable, enclosure, or raceway only where the equipment powered is functionally associated.
725.48(B)(1):
If the control circuit is a class 1 circuit and the feeder is the supply from the generator then I would call that functionally associated.
725.48(B)(1):
If the control circuit is a class 1 circuit and the feeder is the supply from the generator then I would call that functionally associated.
A point worth consideration. I guess one could call it a 110.3 (B) violation. At very least it could void any factory warranties.Even if the NEC allows it I would read the Mfgrs. installation instructions. A lot of them do not permit mixing control with power.
A point worth consideration. I guess one could call it a 110.3 (B) violation. At very least it could void any factory warranties.