Portable generator bonding

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infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Inspector came by and inspected my installation. I had the cover off the wiring compartment and showed him that there was a G-N bonding jumper AND I had installed a ground rod in accordance with manufacturer's instructions and connected it ro the frame of the generator with the lug provided. End of story. :cool:
The is no reason why the connection to the ground rod needed to be removed.
 

kwired

Electron manager
Location
NE Nebraska
Guess I was confused on definition of "Separately derived system" and "Non-separately derived system". The generator manufacturer sent me a illustration from Mike Holt here, and says that when the neutral is Not switched, it is a "Non-separately derived system" and the neutral and ground have to be separated, and when the neutral IS switched in a transfer switch, it is a "Separately derived system" and does not have to be separated. So when using a "generator inter-lock" bracket, as I'm planning on doing, it is considered a "Non-separately derived system". Sort of confusing, but still looks like in my application, they still need to be separated. Do all agree? Thanks
yes it is your application. If you have bonded neutral at generator and don't switch the neutral in the transfer switch, you have neutral current flowing on both the neutral and the EGC to the generator. If you don't bond the generator you have neutral current on the neutral conductor and have a separate EGC back to the generator to bond the generator frame, no current flows on it unless the generator faults to the frame, which is a situation that EGC are for.
 
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