Can you please advise I have FIVE buildings all are fed from single (one meter) incoming utility normal service. Can I have only one ATS feeding each building not individual ATS'S. I understand we need life safety loads on separate ATS'S
single ATS for multiple buildings with single incoming utility service to the site
- Thread starter Preet
- Start date
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
I believe you meant one ATS to feed all 5 buildings. That looks OK to me.
What types of buildings are these, that you believe they will have life safety loads? If they really have Article 517 or 700 loads, that will bring into play a host of requirements related to the backup power source.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
What is the size of this service and is it switchgear with overcurrent protection for each building?
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Sounds like an optional standby system, so as long as the existing life safety is maintained, there should be no problem with one switch.
4000a one service, yes switchgear with overcurrent protection for each building
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
Definitely would be putting a service disconnect to ATS to switchgear arrangement.
Assuming this is optional standby with no legally required standby involved.
But I'm not an engineer or contractor.
Birken Vogt
Senior Member
- Location
- Grass Valley, Ca
How is it drawn on the approved engineered plans?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Those are not "life safety," as that phrase generally belong to medical facilities (per Article 517). They are "emergency loads," per Article 700. You can use batteries or a central inverter system, and not need the generator to serve as the emergency power source.