Two "buildings", one generator

[woodworkingsparky]

Hello,

I'm looking for others input on a building I walked through the other day.

An original building was constructed, sometime later an addition was attached. The addition is served with it's own separate service. There is a two hour separation between the "structures" with the required fire doors, etc.

The catch is that later on, a common emergency generator was installed to serve both buildings. There is no common grounding/bonding taking place between the buildings or services.

I see this as a major safety issue due to grounding concerns...any thoughts?

Thanks!

 

[bphgravity]

Re: Two "buildings", one generator

If the transfer equipment and wiring is installed properly there shouldn't be a problem at all. It's not all that uncommon.

 

[ron]

Re: Two "buildings", one generator

I'll be designing a standby generator plant building to support several buildings on a video production plant campus over the next couple of months. Same concept, one generator plant supporting several buildings.
Should be ok, I think ....
What is your concern about grounding? Give an example of a fault, and where you think those darned electrons may go that they shouldn't.

 

[steve66]

Re: Two "buildings", one generator

Doesn't this require a 4 pole transfer switch, and a neutral-ground bond at the generator???

Otherwise, you would have 2 neutral-ground bonds when the generator is feeding both buildings (one at each building).

Right??

Steve