Lady Engineer
Senior Member
- Location
- New Jersey
Hi everyone,
Usually when sizing a fire pump, I spec a separate service. One, because I don't have to make the tap head of the main, and two I don't have two worry about making the service bigger in order to feed the fire pump.
Well, I'm taking off my Utility Power hat, and putting back on my commercial building hat for this new project. (I do utility power now so I need a refresher)
I have a 75hp, 208V/120 which has a FLA of 214A and a LRA of 1246A. If my demand load is 400A, how large should my entire service be if I want to feed the existing demand load plus the fire pump? I can't remember if I use the FLA for LRA when sizing the service. I am going to tap ahead of the main for this, so I need to let the utility (not mine, other local utility) know what size service I'm requesting.
Usually when sizing a fire pump, I spec a separate service. One, because I don't have to make the tap head of the main, and two I don't have two worry about making the service bigger in order to feed the fire pump.
Well, I'm taking off my Utility Power hat, and putting back on my commercial building hat for this new project. (I do utility power now so I need a refresher)
I have a 75hp, 208V/120 which has a FLA of 214A and a LRA of 1246A. If my demand load is 400A, how large should my entire service be if I want to feed the existing demand load plus the fire pump? I can't remember if I use the FLA for LRA when sizing the service. I am going to tap ahead of the main for this, so I need to let the utility (not mine, other local utility) know what size service I'm requesting.