megawatt
Member
- Location
- Central Kentucky
Guys, I need some help checking a design I have been trying to finalize.
I have asked the local AHJ, & I know He isn't thinking about it long enough to consider all of the items. He hasn't said no to anything yet, but I would love to hear from the experts here...kind of a sanity check !
Here's the situation. Large home ( 8600 sq ft ) 4 heat pumps. 600 amp UG service fed to a CT cabinet mounted outside. 3"PVC runs into mechanical room in basement. Hits a gutter running under 3 200amp MB panels, 3 sets of conductors to the panels.
Here's the deal. Cust wants a generator to power part of His home. I have sized a 60 KW.
I had planed on removing the 3 sets of service wires from the 3" PVC, & cutting in a 12" X 18" box into the 3". Renstalling 1 set of service conductors to MB panel #1. Now out of the CT cabinet install 250 mcm (through the box I cut into the 3" PVC) to a 400 amp ( Service Rated ) ATS. From the ATS I would hit the gutter W 250 mcm & tap 2/0s up to MB panels #2 & #3 ( Which now become Subs ) From the genset, run 250 to the ATS.
I will rework MB panels #2  to seperate EGCs & neutrals & the new cold water pipe ground will be #2 from the 400 amp ATS.
Now is there something I am missing here ? It's just a little different than anything I have done, & I guess I don't trust Myself.
Thanks in advance to anyone who would take the time to reply.
I have asked the local AHJ, & I know He isn't thinking about it long enough to consider all of the items. He hasn't said no to anything yet, but I would love to hear from the experts here...kind of a sanity check !
Here's the situation. Large home ( 8600 sq ft ) 4 heat pumps. 600 amp UG service fed to a CT cabinet mounted outside. 3"PVC runs into mechanical room in basement. Hits a gutter running under 3 200amp MB panels, 3 sets of conductors to the panels.
Here's the deal. Cust wants a generator to power part of His home. I have sized a 60 KW.
I had planed on removing the 3 sets of service wires from the 3" PVC, & cutting in a 12" X 18" box into the 3". Renstalling 1 set of service conductors to MB panel #1. Now out of the CT cabinet install 250 mcm (through the box I cut into the 3" PVC) to a 400 amp ( Service Rated ) ATS. From the ATS I would hit the gutter W 250 mcm & tap 2/0s up to MB panels #2 & #3 ( Which now become Subs ) From the genset, run 250 to the ATS.
I will rework MB panels #2  to seperate EGCs & neutrals & the new cold water pipe ground will be #2 from the 400 amp ATS.
Now is there something I am missing here ? It's just a little different than anything I have done, & I guess I don't trust Myself.
Thanks in advance to anyone who would take the time to reply.
