Another Fire Pump Question

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jay j

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Mpls, Mn
Ok I did a search and could not find my issue, so I had to post, 99% I can find what I need with a search but no luck today.

So this is I what I have.

To make a long story longer this is what going on.

The project is a brand new church.

The fire pump is a 60hp, 480/3V, 518LRA submersible irrigation pump that some well driller put in that?s not rated for fire pump use. Don?t ask how they got this past but they did.

In the original design we had a fire rated fire pump and fire pump controller/service rated disconnect with the fire pump controller being fed from the CT can, perfect just like it should be.

Now, the controller that the pump guy is supplying is not rated for fire use (695.10) and does not have a service disconnect. So be it I guess, I will make a letter about this to cover my a$$.

So this is what I would like to do. Use a 600amp CT can/main fused disconnect (695.4(b)(1)) with 4/0 feeders (695.6(c)(1)). I want to do my part up to code no matter what everybody else is doing.

My question is, being that I don?t have a listed fire pump controller will I have an issue with the 4/0cu conductors while using the 600amp main? I don?t see why but that?s why I'm here.

What type of fuses would we use?

Thanks

All

Jay
 
You say it got passed. As in Plans examination? Don't count on it passing final inspection. At least not by the Fire Department.
 
jay j said:
Ok I did a search and could not find my issue, so I had to post, 99% I can find what I need with a search but no luck today.

So this is I what I have.

To make a long story longer this is what going on.

The project is a brand new church.

The fire pump is a 60hp, 480/3V, 518LRA submersible irrigation pump that some well driller put in that?s not rated for fire pump use. Don?t ask how they got this past but they did.

In the original design we had a fire rated fire pump and fire pump controller/service rated disconnect with the fire pump controller being fed from the CT can, perfect just like it should be.

Now, the controller that the pump guy is supplying is not rated for fire use (695.10) and does not have a service disconnect. So be it I guess, I will make a letter about this to cover my a$$.

So this is what I would like to do. Use a 600amp CT can/main fused disconnect (695.4(b)(1)) with 4/0 feeders (695.6(c)(1)). I want to do my part up to code no matter what everybody else is doing.

My question is, being that I don?t have a listed fire pump controller will I have an issue with the 4/0cu conductors while using the 600amp main? I don?t see why but that?s why I'm here.

What type of fuses would we use?

Thanks

All

Jay
Click to expand...

Jay,
My personal view (from a plans examiners vision ) I would not finish your portion of the work as to not be caught up in the process. Have them submit it for review or request it being looked at by local AHJ or deputy of the AHJ.

Their are alot of factors in your application....being if you are wanting to put a disconnect to your feeders....you have specific wiring methods that are allowed...and i would hate to see you install something that in the end you would have to remove or change and loose all chances of actually making money on the project.

Just my opinion.
 
Wiring means, location of equipment, disconnect requirements and overcurrent protection...all are very specific as per Art 695 and NfPA Standard 20.
As Radio and others have mentioned, I would cease work and put in a request to whomever it need be, to find out what will be the final resolve by the inspector(s). You stand the chance of losing a lot of time and money if you choose to do otherwise.
 
As far as where we are in the project. We did have a meeting with the Fire Inspector and Electrical Inspector. They are ok with what is going on. I'm not but what can I do. As long as I do my part to meet 695 with the items I furnish and install thats all I can really do.

Thanks

Jay
 
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