Can a generator feed two separate buildings?

[cppoly]

Can a single generator be shared to feed two separate buildings with their own services?

 

[charlie b]

Certainly. It might be a bit tricky (but still doable) if one building or the other will use the generator for emergency (i.e., article 700) loads. But if it is for optional standby loads only, it is easy to do.

 

[kwired]

Can a single generator be shared to feed two separate buildings with their own services?

Automatic startup and transfer may be more complex, but otherwise I don't see why not. Would need transfer switch at each building and normal and standby supply to each building.

This for optional standby systems, legally required standby systems might have more restrictions - some maybe even not coming from NEC.

 

[cppoly]

Thanks.

If emergency lighting fixtures are put on this generator, even though they have their own EM battery packs, is this considered now considered an emergency load or can the generator still be considered optional standby if feeding other optional loads as well.

 

[charlie b]

If the backup power source to the egress lights is the battery pack, then the generator is merely another convenient way to keep power going in the building. So yes, it can be treated as an optional standby generator.

 

[publicgood]

Thanks.

If emergency lighting fixtures are put on this generator, even though they have their own EM battery packs, is this considered now considered an emergency load or can the generator still be considered optional standby if feeding other optional loads as well.

Since the EM lights have local batteries and UL 924 switching devices, the generator would not be considered emergency (Level 1 NFPA 110). It is optional stand-by. Depending on the occupancy type, this may be otherwise.