Generator EGC for generator panel
Generator EGC for generator panel
(OP)
Here is my design situation: a new generator is being installed that will feed a generator panel with 16 breakers feeding out to 4 pole ATSs. I will have a disconnect in the panel and there will be an electronic breaker in the generator that is about 75 ft from the building. Since the first disconnect is in the generator and it is a seperately derived system I believe that I have to bond the N-G in the generator and not at the panel (tell me if I am wrong). I was planning on driving an auxillary ground rod and bond it to the frame of the generator. Now it seems to me that I have to run an GEC from the generator back to the GES and a EGC from the generator to the panel. I am wondering if this is legal or not recommended: I would like to run just one EGC/GEC to the generator panel. Then run EGC to all the ATS and a GEC to the GES. Is this legal or poor engineering? I am wondering about running a GEC in the same conduit as the conductors when it is acting as a EGC too. If the breaker wasn't inside the generator I would have done the N-G bond in the panel and wouldn't be asking this question. Maybe I just have to spend the extra money and run an EGC and a GEC. The generator will have Ground Fault monitoring which might be another obstacle. thanks for you input.






RE: Generator EGC for generator panel
See attached a sketch according to interpretation of the Code by University of Massachusetts Amherst College of Engineering for 4 pole ATS
See:
http:/
In my opinion the built-in generator switch does not change the principle:
Generator Yoke Grounding -from utility [service] grounded grounding conductor.
The Load Neutral Grounded conductor is fed from ATS once from Generator and once from Service simultaneously with live phases.
At Generator end has to be a Grounding Electrode to connect only the Neutral Grounding Conductor. Two breaking place does not change the system.
RE: Generator EGC for generator panel
A separate ground conductor is run from the main panel ground to the generator frame.
This basic connection has worked well for generations.
There are field conditions and demands that may make another grounding system mandatory. I have found it well worth the trouble to try to eliminate such conditions so that the simple, basic, dependable grounding system may be used.
When the basic connection can not be used, the system becomes more expensive and more complex. This also implies less dependable.
Bill
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"Why not the best?"
Jimmy Carter
RE: Generator EGC for generator panel
RE: Generator EGC for generator panel
RE: Generator EGC for generator panel