Main Service Switch

[Alwayslearningelec]

So the main service is in building 280. They are running feeders to building 101. Is the xfrmr and switch is building 101 considered another service?

I ask because they are asking me to power the fire alarm FACP from line side of MAIN SERVICE switch. If that MIAN SERVICE SWITCH is considered the one in building 280 and not 101 that is a HUGE difference. Thanks

 

[infinity]

I don't see a service anywhere on your drawing.

 

[Alwayslearningelec]

It not showing but it's in building 280

 

[infinity]

It not showing but it's in building 280

Correct, so it's not relevant to building 101 because building 101 is fed by a feeder.

 

[Alwayslearningelec]

But if fire alarm FACP in building 101 is saying to feed from main service switch it might have to be fed all the way from building 280?

 

[Strathead]

That is a stupid statement and a stupid requirement. You need to RFI it more respectfully than I just put it. It is technically impossible to put it on the line side of the main service switch. You would have to have a service disconnect for the fire alarm branch circuit regardless of the voltage so it would NEVER be on the line side of the service switch.

To answer your specific question, building 101 is fed from a separately derived system, not a service.

 

[infinity]

But if fire alarm FACP in building 101 is saying to feed from main service switch it might have to be fed all the way from building 280?

Is there any code requirement to supply the FA ahead of a service located in a different building? I doubt it, in fact there's probably some code that prohibits it. As Strat stated ask the person who said "they are asking me to power the fire alarm FACP from line side of MAIN SERVICE switch." My guess is that they didn't realize that this building is fed by a feeder.