Commercial Building Service Feeder

[Electriman]

Good Morning,

I am designing the electrical panel for a commercial building that in the future the owner wants to rent it to businesses. I have currently designed required lighting and outlets for the building. But I dont know what I should do to make my system capable of handeling future load. Any business can rent it it could be a beauty saloon or mechanic shop or you name it.

I currently have considered a 225 A 30ckt panel, 240/120 v, but I dont know if it is enough for a 5000 sq ft building.

Any idea?

 

[kwired]

Though it is probably not much overkill for most any application, can easily be not enough for many applications.

Is your mentioned 120/240 single phase?

Put a restaurant in there and you could easily end up needing 400 or even 600 amp 208/120 three phase.

 

[Electriman]

Though it is probably not much overkill for most any application, can easily be not enough for many applications.

Is your mentioned 120/240 single phase?

Put a restaurant in there and you could easily end up needing 400 or even 600 amp 208/120 three phase.

Yes it is single phase 240/120 v.

So you are suggesting to put a three phase 208/120 3-phase with 600 A main breaker panel and even put a 48 ckt panle, considering the owner could put partition and rent it to multiple business, am I right?

 

[victor.cherkashi]

Yes it is single phase 240/120 v.

So you are suggesting to put a three phase 208/120 3-phase with 600 A main breaker panel and even put a 48 ckt panle, considering the owner could put partition and rent it to multiple business, am I right?

Electriman, I don't how it works in other city. I NYC, you should explain to utility company why you need so big load (600A). Maybe utility company can give you according to type of filed occupancy.

Sent from my Nexus 5 using Tapatalk

 

[augie47]

Most often the provisions you make for future growth will be defendant on the size of the owner's wallet
Best you can do is speculate and provide him with options.
I would suggest checking with the utility to see what is available and at what cost.
(Is three phase power readily available or will it cost thousands of dollars to provide, etc,).

 

[electrofelon]

Good Morning,

I am designing the electrical panel for a commercial building that in the future the owner wants to rent it to businesses. I have currently designed required lighting and outlets for the building. But I dont know what I should do to make my system capable of handeling future load. Any business can rent it it could be a beauty saloon or mechanic shop or you name it.

I currently have considered a 225 A 30ckt panel, 240/120 v, but I dont know if it is enough for a 5000 sq ft building.

Any idea?

And what about meters? If there may be several businesses, you may want several meters.

 

[rlundsrud]

I used to do these type installs all the time. The term we used was a vanilla box, this included minimum lighting and outlets every 20' on the demising walls. As far as the service was concerned, it was always a 3 phase 200 amp service with a single meter for each tenant space. The idea being that it was always the tenants responsibility to install a service that fit their specific needs. I would often get the contract to do the tenant install when the space was rented. I would tear out the panel I had installed a few months before and install whatever was needed per the architects specs.

 

[kwired]

Yes it is single phase 240/120 v.

So you are suggesting to put a three phase 208/120 3-phase with 600 A main breaker panel and even put a 48 ckt panle, considering the owner could put partition and rent it to multiple business, am I right?

Not necessarily 600 amp supply/gear, but maybe at least enough raceway to handle 600 or even 800 amps might not be a bad idea. Some 3 or 4 inch raceway is not all that expensive and saves excavation and concrete demolition later when you find out you do need more capacity.

Similar goes for interior wiring, you can put some general purpose lighting and receptacles around the place, but they may get totally rearranged or or even not used at all depending on what occupant comes along.

Even heating/cooling is hard to select when you don't know the heating/cooling load. Office space has different heating/cooling needs then a conference center, church, or other place of assembly.