Bonding between two electrical services.

M

M_Verrando

Member
Location
Ocala, Fl
Occupation
Engineer
I have two buildings, each with separate electrical services. The Main Electrical Services are separated by roughly 560 feet. The Owner would like to install a single standby power generator to power loads in both buildings. Can the Main Grounding Electrodes for both electrical services be bonded, to permit the use of a solid, non-switched neutral, and if so how is the bonding conductor sized?
 
Table 250.66

I don't really see how you will be able to accomplish this without either combining the services or installing two generators and two transfer switches. You would need a common bus. And most utilities won't let you parallel the sources at separate services. Without a common neutral I don't know how you would get away from needing to switch the neutral.
 
Elect117 said:
Table 250.66

I don't really see how you will be able to accomplish this without either combining the services or installing two generators and two transfer switches. You would need a common bus. And most utilities won't let you parallel the sources at separate services. Without a common neutral I don't know how you would get away from needing to switch the neutral.
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Thank you for the insight, all well taken.
 
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