"Six Throws" Grouping of Service Disconnects via (6) Inside 42 Circuit Load Centers

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cottora

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"Six Throws" Grouping of Service Disconnects via (6) Inside 42 Circuit Load Centers

I am a little confused about the six throws rule for service disconnect. I do not believe that all throws must be in a single enclosure, but I am not sure if a grouping of Main Breaker Panels is acceptable. Below is the general setup:

There will be six conductors/feeders that originate at the low side transformer and each conductor will land in a 600 amp Main Break Panel (each panel has ~42 circuits). These panels will be grouped inside and readily accessible (open the door and there they are on the back wall).

The be clear, you can essentially stand in one place, open six doors, throw six breakers, and all power in the building is disconnected.

Thanks!
 
Is this not a continuation of a previous post about the Tap rule we recently discussed ?

JAP>
 
cottora said:
I am a little confused about the six throws rule for service disconnect. I do not believe that all throws must be in a single enclosure, but I am not sure if a grouping of Main Breaker Panels is acceptable. Below is the general setup:

There will be six conductors/feeders that originate at the low side transformer and each conductor will land in a 600 amp Main Break Panel (each panel has ~42 circuits). These panels will be grouped inside and readily accessible (open the door and there they are on the back wall).

The be clear, you can essentially stand in one place, open six doors, throw six breakers, and all power in the building is disconnected.

Thanks!
Click to expand...

This install is compliant and will be the only acceptable means when the 2020 Nec become rule. When 2020 nec comes into effect you will not be allowed to have 6 breakers in one panel as satisfying your 6 disconnect rule.
 
jap said:
Is this not a continuation of a previous post about the Tap rule we recently discussed ?

JAP>
Click to expand...

If need be I can move it there. But it is a totally different issue that is not contemplated in the previous post. That said, this business solution is derived from the knowledge of that post. Thanks
 
ActionDave said:
Are you sure you are talking about a service disconnect? In the NEC the Service Disconnect is a specific point and it is basically where the power company ends and the wiring inside the building starts?
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Aren't you describing a service point? The "service disconnect" is quite often in a separate enclosure, fed by "service entrance conductors."
 
cottora said:
There will be six conductors/feeders that originate at the low side transformer and each conductor will land in a 600 amp Main Break Panel (each panel has ~42 circuits). These panels will be grouped inside and readily accessible (open the door and there they are on the back wall).
Click to expand...

So these breaker panels are all services?
 
So the 6 panels are not service panels and do not contain the service disconnects? If that is true then the 6 throw rule is not applicable.
 
infinity said:
So the 6 panels are not service panels and do not contain the service disconnects? If that is true then the 6 throw rule is not applicable.
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That is correct. But I was under the belief that once you enter a building then you have to be able to cut power to such building within a prescribed way.
 
Dennis Alwon said:
This install is compliant and will be the only acceptable means when the 2020 Nec become rule. When 2020 nec comes into effect you will not be allowed to have 6 breakers in one panel as satisfying your 6 disconnect rule.
Click to expand...

What is the reasoning for that?
 
infinity said:
So the 6 panels are not service panels and do not contain the service disconnects? If that is true then the 6 throw rule is not applicable.
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6 throw rule still applies to the main disconnecting means of a building even if not service supplied.

His problem in that other thread is the need to land the taps at a single overcurrent device to comply with tap rules.
 
qcroanoke said:
What is the reasoning for that?
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My guess, they decided they don't want people working in the enclosure that has live parts even with the main(s) off. Kind of lining up to some extent with 70E, though if it is critical to comply with 70E then maybe people were designing accordingly anyway.
 
I have to say, I've never witnessed a service or a feeder to a building that was set up as (6) individual 600 amp Main Breaker 42 circuit panels grouped together as the disconnect.

Seems odd, but, to each his own.

JAP>
 
jap said:
I have to say, I've never witnessed a service or a feeder to a building that was set up as (6) individual 600 amp Main Breaker 42 circuit panels grouped together as the disconnect.

Seems odd, but, to each his own.

JAP>
Click to expand...

For more background...This will be a bitcoin mining container (40 feet in length). So the six panels will land the conductors from the transformer and then these panels will branch off to feed ~1,000 outlets running down multiple rows of shelves. Each duplex outlet will be 208v with a 20 amp breaker from said panel. The outlets quad boxes will be fairly close together and running the length of the container on at least three rows.
 
I'm having a hard time picturing this.

Are the 6 600 amp Panelboards located in one of the containers? or, are the 6 600 amp panelboards located in a warehouse and feeding several individual storage containers that have multiple 20a 3ph outlets and shelving installed inside of the individual containers ?

JAP>
 
jap said:
I have to say, I've never witnessed a service or a feeder to a building that was set up as (6) individual 600 amp Main Breaker 42 circuit panels grouped together as the disconnect.

Seems odd, but, to each his own.

JAP>
Click to expand...

NO you wn't see that but you could see 6 - 100 amp breakers or combination of any 6 breakers

What was common in our area was 100 to the sub panel, a 40 for the range, 30 for water heater, 30 for dryer, 30 or so for the a/c and 60 or so for heat strips. That would be your 6 disconnects on a 200 amp service. There was no way to work on the panel de-energized.
 
BTW, My thinking is the OP had a 1600 amp service with 6 disconnects out of that sized probably 200 amps or so. Either that or he is building one huge service
 
Dennis Alwon said:
BTW, My thinking is the OP had a 1600 amp service with 6 disconnects out of that sized probably 200 amps or so. Either that or he is building one huge service
Click to expand...

I'm with ya Dennis, but, go back and read his post #1.

It seems to be describing (6) 600 amp Main Breaker 42 circuit panels is what is being contemplated.

It's either that or the description is incorrect.

JAP>
 
If we haven't seen one like this before , we're fixing to because that's what it sounds like is being designed to be built. :D

JAP>
 
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