Fire pump generator conductor connected without overcurrent protection

[hhsting]

See attached sketch. I. have onsite generator which feeds fire pump. However the conductor from generator to enclosed circuit breaker 200A have no overcurrent protection and they run several hundred feet. When they enter the building a 200A enclosed circuit breaker is provided.

Should not the conductors require overcurrent protection?

 

[infinity]

Is the entire run outside until it hits the 200 amp breaker?

 

[hhsting]

Is the entire run outside until it hits the 200 amp breaker?

Yes the generator is outside and cables are run outside underground until they come up into the building electrical room right into the 200A enclosed circuit breaker.

 

[augie47]

IMO the install would comply with 240.21(B)(5)

 

[infinity]

Sounds like the unlimited length outdoor tap rule applies.

 

[hhsting]

IMO the install would comply with 240.21(B)(5)

How is the conductor a feeder?

 

[don_resqcapt19]

How is the conductor a feeder?

Because it is broken up into two circuits, each with their only OCPD at the load end.
Also, I am not sure that you can have that 200 amp OCPD on the line side of the transfer switch.

 

[hhsting]

Because it is broken up into two circuits, each with their only OCPD at the load end.
Also, I am not sure that you can have that 200 amp OCPD on the line side of the transfer switch.

I dont follow. How is this feeder? Its connected on line side of 100a breaker.


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[hhsting]

I dont follow. How is this feeder? Its connected on line side of 100a breaker.


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Anyone?

 

[infinity]

I dont follow. How is this feeder? Its connected on line side of 100a breaker.

Where is the 100 amp CB in the diagram?

 

[hhsting]

Where is the 100 amp CB in the diagram?

See attached




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[hillbilly1]

I’ve seen engineers spec fire pump feeds to have no ocp from the generator, and have done it many times on Lowes generator installs, though not required, it can have an ocp on a generator application.

 

[infinity]

I dont follow. How is this feeder? Its connected on line side of 100a breaker.

See attached

What does that have to do with the fire pump?

 

[hhsting]

What does that have to do with the fire pump?

Question is the conductors in question post number #1 you all are saying feeder and feeder taps rule apply. If those conductors are connected line side of the 100A breaker then how are they feeder?

 

[hhsting]

I’ve seen engineers spec fire pump feeds to have no ocp from the generator, and have done it many times on Lowes generator installs, though not required, it can have an ocp on a generator application.

Is there any code section? Also how are those conductors protected?

 

[don_resqcapt19]

Question is the conductors in question post number #1 you all are saying feeder and feeder taps rule apply. If those conductors are connected line side of the 100A breaker then how are they feeder?

I don't see any breaker other than the 200 amp one in the fire pump circuit.

 

[don_resqcapt19]

Is there any code section? Also how are those conductors protected?

In general fire pump conductors are not protected.

 

[hhsting]

I don't see any breaker other than the 200 amp one in the fire pump circuit.

See post #11 attachment. 100A internal breakers are seen there

 

[hhsting]

In general fire pump conductors are not protected.

Has to be code section where this is allowed. The conductor with no generator ocpd feeds fire pump

 

[infinity]

See post #11 attachment. 100A internal breakers are seen there

Those 100 amp breakers are not connected to the fire pump.