Fire pumps

Status
Not open for further replies.
If you can't tell I haven't done many and the last one was a while ago when I was still a young spark just taking orders

Sent from my SM-G986U using Tapatalk
 
Controller. I would recommend reading 695 and if you have NFPA 20 it’s a small article but can be confusing. Your inspector might say something about the sprinkler piping above the controller, and make sure that’s fire retardant wood
 
We have what's called an endbox here where edison brings in their SEC from the streets

Sent from my SM-G986U using Tapatalk
 
JGinIndy said:
Yeah tap section is an east coast thing I reckon
Click to expand...
In the south we call it a pull section, must be a northeast thing. Rarely we tap in there, other than the main’s bussbar connection. Fire pump is usually piped directly from the transformer. Another thing too, is the poco CT’s down here are usually there too instead of on the building, so pump is still metered.
 
JGinIndy said:
125% to controller Wye to delta run then controller to motor 72% but I have been rusty today
Click to expand...
Our newest 200 HP fire pump has a soft start instead of Y start Delta run. Never liked this set up. Seen several motors burn out when timer hung up and motor stayed on Y connection. It took me a while to figure out why the Hospital & research centers that I retired from all had the Y start Delta run on the 5 older fire pumps that had emergency power back up from generators. With the Y delta starting arrangement you might be able to get by with a smaller generator.
 
garbo said:
Our newest 200 HP fire pump has a soft start instead of Y start Delta run. Never liked this set up. Seen several motors burn out when timer hung up and motor stayed on Y connection. It took me a while to figure out why the Hospital & research centers that I retired from all had the Y start Delta run on the 5 older fire pumps that had emergency power back up from generators. With the Y delta starting arrangement you might be able to get by with a smaller generator.
Click to expand...
Agreed. The last soft start I inspected was a 3 compartment ATS / Controller basically had a VFD in the “3rd” compartment.
 
hillbilly1 said:
In the south we call it a pull section, must be a northeast thing. Rarely we tap in there, other than the main’s bussbar connection. Fire pump is usually piped directly from the transformer. Another thing too, is the poco CT’s down here are usually there too instead of on the building, so pump is still metered.
Click to expand...
It took over a year for city of philadelphia to okay an existing 50 year old fire pump reconnection when the large hospital replaced one of the dual service 13.2 KV switchgear and secondary load center. They insisted that they must install a dedicated 13.2KV to 480 volt transformer just for old existing fire pump. Did not make sense to anyone that a dual service along with 4 760 KW generators would be more reliable then a single step down transformer. Besides the crowded lowest level basement did not have room for this transformer.
 
garbo said:
It took over a year for city of philadelphia to okay an existing 50 year old fire pump reconnection when the large hospital replaced one of the dual service 13.2 KV switchgear and secondary load center. They insisted that they must install a dedicated 13.2KV to 480 volt transformer just for old existing fire pump. Did not make sense to anyone that a dual service along with 4 760 KW generators would be more reliable then a single step down transformer. Besides the crowded lowest level basement did not have room for this transformer.
Click to expand...
Had an inspector In Kentucky that wanted that on a Lowe’s. I told him to get with the utility on that, and get back with me on that. Never heard anything more from him. If he did, the engineers probably laughed their a** off at him. LOL!
 
Status
Not open for further replies.
Top