Tap ahead of generator main CB

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anbm

Senior Member
Can we tap ahead of generator main breaker to feed fire pump ATS? (the normal power feed to the fire pump was from utility xfmr). Thanks!
 

hillbilly1

Senior Member
Location
North Georgia mountains
Occupation
Owner/electrical contractor
I have done it many times per EE instruction, though it is not required, I think the EE did it this way for cost efficency. The main breaker was a shunt trip type, and was used to drop the building load when the pump was running.
 

anbm

Senior Member
I guess one of reasons we do this is when we can't coordinate between EG main breaker and fire pump breaker, I am not sure you can drop ALL building load even when fire pump runs (i.e egress lighting, fire alarm, etc)
 
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