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Help! I need to sketch out what the equipment for a 600A service with a 400A ATS is going to look like against the house.

R

rnew

Member
Location
Indianapolis
Occupation
Electrical Project Manager
What's the setup look like when you have a 600amp service with a 400amp ATS for a generator and where does the disconnect sit in that set up?

I've mostly worked in standard older homes with 100-200amp services- very straightforward, no CT cabinet needed, never had to deal with a generator or an ATS. Now I work on multi-million dollar homes with much larger services. This one happens to be a 600 amp service and the homeowner wants to go with a 60kw generator and a 400 amp transfer switch to cover 2 of 3 200amp panels.

I need to mock up a sketch of how this equipment is all going to lay out on the side of the house so we can figure out where to core drill for our conduit. And I have no idea where to start.

Any help would be immensely appreciated.
 
augie47

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
The configuration may vary depending on the applicable Code cycle .
IMO, I would picture a meter or CT cabinet (dependent on POCO requirement) feeding a 400 amp disconenct > ATS > (2) 200 amp panels (tap rules applied) and a 200 amp disconnect fed from the CT (not from the ATS) with the 400 amp and 200 amp disconnects grouped.
I'm sure there are other configurations,.
 
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