mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
What are the requirements for a fire pump as a whole (NEC + other codes) regarding electrical?
1. If I have an MV service, do I need to tap at the MV point and set a separate transformer or can I come right after the 480 volt secondary of the main transformer for the whole building?
2. What parts of the conduit system needs a 2 hour fire rating?
3. Do I need selective coordination on the emergency switch board? I am having trouble here because a fire pump is not supposed to have overload protection, yet its needed at the emergency switch board as to prevent the generator from being over loaded and removing the life safety circuit in the building.
4. Any delays or first transfer requirements on the fire pump ATS?
5. Does my dedicated fire pump transformer served by the utility need a GFP secondary if over 1000amps and 480 volts?
6. (bonus question) In a complex of buildings where a central backup generating station exists, I only have to factor in the largest fire pump or group of fire pumps in only one building provided an interlock is present to allow only 1 fire pump per building to operate at one time? And the fire department must have control over that interlock?
Following pics depict one building, one 15kv service tapped for the fire pump and one large backup generator subdivided into 3 circuits: 1. Fire pump 2. Life safety 3. Optional standby under delayed transfer.
1. If I have an MV service, do I need to tap at the MV point and set a separate transformer or can I come right after the 480 volt secondary of the main transformer for the whole building?
2. What parts of the conduit system needs a 2 hour fire rating?
3. Do I need selective coordination on the emergency switch board? I am having trouble here because a fire pump is not supposed to have overload protection, yet its needed at the emergency switch board as to prevent the generator from being over loaded and removing the life safety circuit in the building.
4. Any delays or first transfer requirements on the fire pump ATS?
5. Does my dedicated fire pump transformer served by the utility need a GFP secondary if over 1000amps and 480 volts?
6. (bonus question) In a complex of buildings where a central backup generating station exists, I only have to factor in the largest fire pump or group of fire pumps in only one building provided an interlock is present to allow only 1 fire pump per building to operate at one time? And the fire department must have control over that interlock?
Following pics depict one building, one 15kv service tapped for the fire pump and one large backup generator subdivided into 3 circuits: 1. Fire pump 2. Life safety 3. Optional standby under delayed transfer.
