Is that possible to get 5000A 480v 3phase 4 wire electrical service?

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dahualin

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The biggest service I have done before is 3000A 480V 3phase 4 wire? I don't know if I can get 5000A service. Thanks.
 
The only "correct" answer you will get is from the POCO where the job is located at.

I imagine bringing in 4160v would be an easier task than all those parallel runs.
 
The job is located in Carlisle, PA. Thanks.

The existing service is 3000A 480v 3phase 4 wire. A big addition is going to be added to the existing building. So I wonder if I can upgrade the existing service to accomodate the addition load.
 
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I have seen a few 4000 - 208 services.

I think you start to hit a point where it makes much more sense to have multiple services or feeders spread out around the building or make the jump to a high voltage (13.8 KV etc) service and distribute high voltage around the building.

Not many occupancies need 5000 amps of 480 volt power in a small area, once you start trying to make use of all that power in a large building distribution becomes costly.
 
230.2(C) would allow it. That makes more sense to me than trying to run more than a dozen 500 MCM conductors side-by-side, and connect them to the same bus bars.
 
A new service would also save a long outtage. And it would save the cost of redo-ing 3000A worth of existing wire (unless they already have spare conduits installed.)

I don't think anything says the services have to be next to each other.
 
I have added several additional banks to existing customers anywhere from 600 amp to several thousand. I work for a power company and most of the reason the customer has is down time, they just can't afford to have the down time to add to the existing. Most of the time during initial construction of a plant I try to get them to pour another pad and conduit system for future expansion but they don't. Then they fuss when it comes time to add on.
 
gobblerhuntr said:
Most of the time during initial construction of a plant I try to get them to pour another pad and conduit system for future expansion but they don't. Then they fuss when it comes time to add on.
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Have you ever gotten any of them to make the connection (pardon the pun) with your prior suggestions?
 
dahualin said:
Or can I add another 3000A service next to existing electrical service? I think it looks wield.
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Why side by side?

That still puts all your power in one part of the building and you will still have to distribute it.

It happens we did a large (very large) food warehouse in PA. That building had seven 3000 amp 480 volt switch gears spread out around the perimeter of the building.

I was not involved enough to know for sure if they where services or actually feeders from a customer owned high voltage distribution system.

On a smaller scale we did a large office building designed for computer companies, that building has three 3000 amp 480 volt services around the perimeter.
 
iwire said:
Why side by side?

That still puts all your power in one part of the building and you will still have to distribute it.

It happens we did a large (very large) food warehouse in PA. That building had seven 3000 amp 480 volt switch gears spread out around the perimeter of the building.

I was not involved enough to know for sure if they where services or actually feeders from a customer owned high voltage distribution system.

On a smaller scale we did a large office building designed for computer companies, that building has three 3000 amp 480 volt services around the perimeter.
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The project I am doing is a big warehouse. The major loads added are refrigeration equipment (monster compressors) and huge battery charging area. Both of them will be located very close to existing electrical room. That is why I think either upgrade the existing service to 5000A or add a new electrical room with a new 3000A service next to existing electrical room. That is the area where it is easier to modify the floor plan in a big warehouse with all the dock doors and dock levelers around the building. Thanks.
 
Did one in MD where the feed form POCO was 34,500 volts. Two xformers, (1) 1500 kva ans (1) 26750 kva. All located in one company owned substation and distributed from there at 480. Lots of parralleled (sp) cables to the switch gear.
 
One of the big utilities in my area won't supply more than 4000A. I have supplied buildings with 5000A via customer owned medium voltage primaries and substations however. The 480 secondary has always been bus duct.
 
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