Generator installation question

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arturojrb

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Electrician
I have a 20RESA kohler Generator and a RXT 200 AMP ATS that I need to install in MA. The meter is around 100 ft away from the house.

My plan is replace the actual meter for a Homeline 200 Amp 8-Space 16-Circuit Outdoor Ringless Overhead/Underground Main Breaker, (need the 8 space for future pool equipment and small shed close to it)
then feed the ATS and
then feed the house panels inside from the ATS. The generator will be close to it, so will be far from the house canceling the noise a lit bit

I am journeyman electrician, this is my first generator job, so I am not sure if this is the best way to do it, any advise will be very much appreciated.

Thank you
 
Your conductors from the service panel to the gen, and from gen back to house can't use the 83% rule as they don not carry the entire dwelling unit load - IE can't run 4/0 Al, assuming 200 amp service.
 
And did you do a load calc for generator size, or will do load shedding if gen can't carry entire connected load?
 
Thanks for your reply.
Yes is a 200A Service,
Yes I did a load calc for the generator size and should be enough for the entire house.

Im not sure If I explained it right. what Im trying to do is replace the existing meter, with a meter/main combo, then feed the ATS connect it to generator then from the ATS use the same old conductors going to the panels inside.

If that is wrong, how should I do to have the entire house working with the generator?
 
Your plan in general is fine. Keep in mind your service disconnect is now where the previoulsy there was only a meter so your interior panel is now a sub-panel and will require separate neutral-ground connections and your grounding electrode conductors will now need to originate in your new meter combo.
 
Doesn't that also mean replacing the existing underground service conductors with feeder conductors?

I.e., changing 3-wire to 4-wire.
 
In my area when we replace a meter(at the street) with a meter main combo they do not make us run new 4-wire cable to the house. They accept the existing 3-wire as adequate and we leave the G-N bond in the house even though there is a new first means of disco at the street. They must figure it's way too disruptive to dig up all the old cable.

Not sure how this would differ with a generator but just FYI.
 
Upgrade older 3-wire range and dryer circuits per 250.24(A)(5)

Add surge protection per 230.67

Need a disconnect at the structure because the gen-set is not "within sight" per 702.12(A)
 
JoeNorm said:
In my area when we replace a meter(at the street) with a meter main combo they do not make us run new 4-wire cable to the house. They accept the existing 3-wire as adequate and we leave the G-N bond in the house even though there is a new first means of disco at the street. They must figure it's way too disruptive to dig up all the old cable.

Not sure how this would differ with a generator but just FYI.
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I believe Mass. has a similar exemption, but what he is indicating is the use beyond an E-Disco Non Service Rated. The plan as stated was using it also to serve pool equipment and an out building, that would mean that the panel would need to be Service Rated, and thus would require the 4th conductor to the house panel. (Unless MA has other additional exemptions.) Also those points made by @shortages a consideration if the disco is Service Rated, particularly the range/dryer connections.
 
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