feeders and controll wireing in same raceway

[Hendrix]

NEC article?

 

[infinity]

You would first need to define control wiring. For Class 2 look at 725.136.

 

[Hendrix]

You would first need to define control wiring. For Class 2 look at 725.136.

Its a 20 kw resi. gen set.

 

[Wilg]

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.

 

[don_resqcapt19]

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.

You need to read the informational note in that section. Just because the control conductors have the same voltage rating does not automatically mean that they can be in the same raceway with the power conductors.

 

[kwired]

725.48(B)(1):

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.

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.

 

[infinity]

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.

I agree, if the power supply said Class 2 Only then you would need the required separation regardless of the conductor type.

 

[qcroanoke]

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.

Even if the NEC allows it I would read the Mfgrs. installation instructions. A lot of them do not permit mixing control with power.

 

[kwired]

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.

 

[qcroanoke]

A point worth consideration. I guess one could call it a 110.3 (B) violation. At very least it could void any factory warranties.

Yes, If mfgr. instructions prohibit it that is what they will point at if a failure to start or transfer occurs. Of course the H.O. is going to hold installer responsible.