Two electric services

[hhsting]

Please see attached sketch shows four tenant spaces separated by demising wall.

I have two incoming electric utility services one 208/120V three phase 800A feeding 6 service disconnects meter stack MLO located in sprinkler room. The second 208/120V 600A feeding service trough with 3 service disconnects located in tenant #1 space

The first electric utility service meter stack six main service disconnects two of them feed tenant #1 space, one of them feed tenant #3 space, other one feed tenant #4 space and sixth one is spare feeding nothing.

The second electric utility service 600A trough service disconnects all three feed tenant #1.

Assume each four tenant spaces are separate buildings. Note sprinkler room is in tenant space #1 enclosed by walls and can only be accessible thru outside door. Not sure if it is even considered part of tenant #1 or not.


Following are the question:

1. Would it be considered code compliant NEC 230.2 a building is only served by one utility service if meter stacks two service disconnect feeding tenant #1 are relocated to be fed from service 600A trough disconnects? That way tenant #1 electric utility would serve only tenant #1 and meter stacks utility would serve multiple tenants but their is no provision that single utility cannot serve multiple buildings. Please let me know your opinions and thoughts

 

[electrofelon]

It's hard to read your chicken scratches, and understand your wording, but looks non compliant to me. I don't see any of the exceptions for multiple services being met.

 

[hhsting]

It's hard to read your chicken scratches, and understand your wording, but looks non compliant to me. I don't see any of the exceptions for multiple services being met.

Ok see attached sketch hopefully its more clear as to what is being done to comply with 230.2.

In the attached sketch the 600A 208/120V three phase service is serving only Tenant #1 space and its in Tenant #1 space.

The 800A incoming 208/120V three phase service and meterstack is in sprinkler room. The 800A service and meter stacks serve tenants #2,3,4.

All tenant spaces are separated by demising wall 4 hours rated. They are 4 separate buildings.

What is it that does not comply with 230.2 exactly?

 

[electrofelon]

Ok see attached sketch hopefully its more clear as to what is being done to comply with 230.2.

In the attached sketch the 600A 208/120V service is serving only Tenant #1 space and its in Tenant #1 space.

The 800A incoming service and meterstack is in sprinkler room. The 800A service and meter stacks serve tenants #2,3,4.

All tenant spaces are separated by demising wall 4 hours rated. They are 4 separate buildings.

What is it that does not comply with 230.2 exactly?

What exception do you think allows 2 services?

 

[hhsting]

What exception do you think allows 2 services?

What exceptions you are talking about? With 4 separate buildings I need exceptions?Demising walls creates 4 SEPARATE BUILDINGS.

 

[don_resqcapt19]

What exceptions you are talking about? With 4 separate buildings I need exceptions?Demising walls creates 4 SEPARATE BUILDINGS.

It might or might not...to create separate buildings it must be a fully rated fire wall and extend above the roof at least 30". Nothing in your post indicated that the walls in question do that.

 

[electrofelon]

Also,

It might or might not...to create separate buildings it must be a fully rated fire wall and extend above the roof at least 30". Nothing in your post indicated that the walls in question do that.

Also, unless I am misunderstanding, it seems the two services are in the same building I doubt the sprinkler room is a separate building.

 

[hhsting]

It might or might not...to create separate buildings it must be a fully rated fire wall and extend above the roof at least 30". Nothing in your post indicated that the walls in question do that.

Below is cross section taken from plan. It extends all the way up to underside of roof deck. It seems its 1 hour

 

[hhsting]

Also,

Also, unless I am misunderstanding, it seems the two services are in the same building I doubt the sprinkler room is a separate building.

True but the wording of 230.2 first paragraph says shall have only one utility building served. Although second utility maybe same building but that second utility is actually serving other buildings. Its not serving the same building??

 

[roger]

Below is cross section taken from plan. It extends all the way up to underside of roof deck. It seems its 1 hour

That will not work for defining separate buildings. You need to do some architectural research so you can understand more about building construction. The architectural part of the plans you are reviewing will have pertinent information as to how many buildings you have.

Roger

 

[DrSparks]

They are not discrete buildings.

Sent from my BE2028 using Tapatalk

 

[don_resqcapt19]

Below is cross section taken from plan. It extends all the way up to underside of roof deck. It seems its 1 hour

That is one building with firewalls between occupancies, it is not multiple buildings.

 

[hhsting]

That is one building with firewalls between occupancies, it is not multiple buildings.

I think thats not firewall just fire barrier or fire partition but I am not expert on IBC 2018?

 

[kwired]

Multi occupant situations can have a service to each occupant, but here there is two sets of service disconnecting means in the same occupancy supplying all of the occupancies. You could possibly have all them supplied from the one occupancy, but not seeing any justification for the second service unless it is only supplying a fire pump and any allowed aux components, but most the descriptions so far don't seem to indicate that.

 

[electrofelon]

True but the wording of 230.2 first paragraph says shall have only one utility building served. Although second utility maybe same building but that second utility is actually serving other buildings. Its not serving the same building??

I think you can make a case that you could have two services since one is not "supplying" the building, HOWEVER, 230.3 doesnt allow service conductors to pass through another building, so that squashes that angle if the service is on the INSIDE of the first building.

 

[hhsting]

I think you can make a case that you could have two services since one is not "supplying" the building, HOWEVER, 230.3 doesnt allow service conductors to pass through another building, so that squashes that angle if the service is on the INSIDE of the first building.

Ah but its not passing thru. They are in the tenant space and terminate in the tenant space. Right at Meter stacks service disco they stop but meter stacks feeders serves other buildings and by doing so utility serves other building

 

[electrofelon]

Ah but its not passing thru. They are in the tenant space and terminate in the tenant space. Right at Meter stacks service disco they stop but meter stacks feeders serves other buildings and by doing so utility serves other building

Maybe. IT depends on how you interpret the words. One argument is the service is still supplying the second building even if by feeder.

But regardless, you have two services in one building, without an applicable exception for having two services.

 

[kwired]

Maybe. IT depends on how you interpret the words. One argument is the service is still supplying the second building even if by feeder.

But regardless, you have two services in one building, without an applicable exception for having two services.

That is what I see as the biggest issue.