320 amp single phase residential service. There are 2each 200amp panel boxes in the attached garage ran straight from the meterbase with no oudoor disconnects. If i changed the meterbase from double lugs to triple lugs and added another panel box outside with its own 200amp disconnect, would this violate service disconnecct grouping rules?
disconnect locations
- Thread starter difowler1
- Start date
- Status
disconnect locations
The pool doesnt need 200amps. The HO is considering adding a large detached garage in the future. I could use one of the 200amp panels inside the house. I would need to cut a hole in the brick and cut out the sheetrock. It seems better to add a panel on the outside because the power will be needed outside, and I wouldnt need to cut holes in their brick and sheetrock, but I was wondering if that would violate disconnect grouping rules.
The pool doesnt need 200amps. The HO is considering adding a large detached garage in the future. I could use one of the 200amp panels inside the house. I would need to cut a hole in the brick and cut out the sheetrock. It seems better to add a panel on the outside because the power will be needed outside, and I wouldnt need to cut holes in their brick and sheetrock, but I was wondering if that would violate disconnect grouping rules.
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Elec Trix
New member
- Location
- New Orleans, Louisiana
I, and the Electrical Inspector who failed me on this issue, believe that 'Grouped' means all disconnects must be next to each other on the same side of a wall. Thus, you having two disconnects inside the garage and the new one outside the garage would not be considered 'Grouped ', and therefore in violation. I could never find a clear definition of grouped though 225.34 A and 230.72 use that phrase.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
IMO disconnects on the opposite sides of a wall are not grouped so unless there is an code exception that permits that I agree with the inspector.
:happyyes:
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
At same time you are allowed to connect that third set of conductors in the meter and supply an accessory building with service disconnect for that building in or on that accessory building.
One would need to make sure total load calculation doesn't exceed the common supply conductor ampacity, if they are covered by NEC. If they are on the POCO side of the service point they are not covered by NEC and it is up to the POCO to decide if they are sufficient to supply the total load.
One would need to make sure total load calculation doesn't exceed the common supply conductor ampacity, if they are covered by NEC. If they are on the POCO side of the service point they are not covered by NEC and it is up to the POCO to decide if they are sufficient to supply the total load.
It is a confusing requirement. Technically, the installation should be permitted because each tap off the meter base is a separate service entrance conductor (SEC). A disconnect related to one SEC is not required to be grouped with that of another. Yet I believe most AHJ will view them as grouping required.
david
Senior Member
- Location
- Pennsylvania
I believe the original installation is allowed under exception # 2 and the proposed installation would be allowed under exception # 3
“ A single-family dwelling unit and a separate structure shall be permitted to have one set of service-entrance conductors run to each from a single service drop or lateral.”
IV. Service-Entrance Conductors
230.40 Number of Service-Entrance Conductor Sets.
Each service drop or lateral shall supply only one set of service-entrance conductors.
Exception No. 2: Where two to six service disconnecting means in separate enclosures are grouped at one location and supply separate loads from one service drop or lateral, one set of service-entrance conductors shall be permitted to supply each or several such service equipment enclosures.
edited for comment : Though technically if the utility service is a over head drop exception # 2 would not apply to the original installation since there are more than one set of service entrance conductors to the separate service enclosures location in the attached garage
“ A single-family dwelling unit and a separate structure shall be permitted to have one set of service-entrance conductors run to each from a single service drop or lateral.”
IV. Service-Entrance Conductors
230.40 Number of Service-Entrance Conductor Sets.
Each service drop or lateral shall supply only one set of service-entrance conductors.
Exception No. 2: Where two to six service disconnecting means in separate enclosures are grouped at one location and supply separate loads from one service drop or lateral, one set of service-entrance conductors shall be permitted to supply each or several such service equipment enclosures.
edited for comment : Though technically if the utility service is a over head drop exception # 2 would not apply to the original installation since there are more than one set of service entrance conductors to the separate service enclosures location in the attached garage
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