electrician

[shaun m rice]

I am hooking up a bonded 17.5 kw portable generator ( generac ) to a new subpanel using a 50 amp inlet and a double pole double throw switch as the manual transfer switch . Since the generator is the bonded type this would be considered a separately derived system and the neutral would have to be switched as there can only be 1 bond point between the grounded conductor and the ground . Would a ground rod be required at the site of the inlet to be connected during use and can you see any code issues with this installation ? I will be using a 3 pole switch 2 phases and the neutral switched together,

 

[shaun m rice]

electrician

sorry 3 pole switch

 

[infinity]

I there any reason why you want this setup as an SDS? You could eliminate the MTS and grounding electrodes if you use the generator with an unbonded neutral.

 

[ggunn]

I am hooking up a bonded 17.5 kw portable generator ( generac ) to a new subpanel using a 50 amp inlet and a double pole double throw switch as the manual transfer switch . Since the generator is the bonded type this would be considered a separately derived system and the neutral would have to be switched as there can only be 1 bond point between the grounded conductor and the ground . Would a ground rod be required at the site of the inlet to be connected during use and can you see any code issues with this installation ? I will be using a 3 pole switch 2 phases and the neutral switched together,

If you connect it this way and the existing N-G bond is outside the transfer switch, then yes. I think I would separate N and G at the generator, though, and not switch the N.

 

[cpinetree]

What is the model number of the generator?

I'm pretty certain the last 2 Generac 17.5kw portables we wired for, did not have a neutral bond connection (They floated)

 

[shaun m rice]

that's what I was going to do but is says on the side bonded so I am changing the switch to a 3 pole . I did not supply generator.

What is the model number of the generator?

I'm pretty certain the last 2 Generac 17.5kw portables we wired for, did not have a neutral bond connection (They floated)

 

[shaun m rice]

If you connect it this way and the existing N-G bond is outside the transfer switch, then yes. I think I would separate N and G at the generator, though, and not switch the N.

Do not think it is a good idea to alter the generator even if I had access to that connection.

 

[shaun m rice]

I there any reason why you want this setup as an SDS? You could eliminate the MTS and grounding electrodes if you use the generator with an unbonded neutral.

I ordered a 2 pole switch and am now returning it for 3 pole as I did not supply generator . That being said do you see a problem with the install? I read online that for arcfault and gfi breakers this might be the preferrd method.