Bonding Neutral and Grounds

infinity said:
Someone told me that a while back so I asked the same question about a year ago.
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In the case of a Generac ATS that is service rated though 230.82 doesn't include the electricity to run the transfer switch, charge the generator, etc. before the service disconnect so, even though it is listed as service equipment, it can't be used for an emergency disconnect IMO. What do you think?
 
Strathead said:
In the case of a Generac ATS that is service rated though 230.82 doesn't include the electricity to run the transfer switch, charge the generator, etc. before the service disconnect so, even though it is listed as service equipment, it can't be used for an emergency disconnect IMO. What do you think?
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I believe on the Generac ATS the "service disconnect" does indeed disconnect all utility power so it could be the emergency disconnect.
 
augie47 said:
I believe on the Generac ATS the "service disconnect" does indeed disconnect all utility power so it could be the emergency disconnect.
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But, 230.82 lists all items acceptable on the supply side of a service disconnect and generator or ATS control power is not on that. So, you would not be able to use that as an emergency disconnect.
 
ddaut said:
I see many times where there is a meter and disconnect on the outside of a home. Immediately adjacent on the inside of the home there is an indoor panel with a main disconnect and all the circuit breakers. Most of the time grounds and neutrals are not separated in the inside panel. So they are bonded outside in the disconnect and also bonded inside at the main panel; usually less than 6 feet apart. It’s my understanding that neutrals and grounds should be separated at the first disconnect and stay separated after that. How bad is this and is there an exception to make this code compliant?


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It depends, what year the work was done. Prior to the 1999 code adoption it was legal to have ground & neutral combined in the panel, back then 3 wire feeders were also the standard, newer work should be seperate.
 
sgtsparky said:
It depends, what year the work was done. Prior to the 1999 code adoption it was legal to have ground & neutral combined in the panel, back then 3 wire feeders were also the standard, newer work should be seperate.
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Are you saying within the same structure you could run a 3-wire feeder to a panel and bond the neutral prior to the 1999 NEC?
 
LarryFine said:
No, not in the same structure. That's been verboten for many decades.
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LarryFine said:
Pre 99 or the 96 code is 2-1/2 decades back and it was the standard just the same as 3 wire feeders, that’s when the 4 wire became the standard, I remember having in-depth conversations with our chief inspector, with code only requiring 25 ohm or a 2nd ground rod the only thing the separate ground would do is keep the voltage from floating as a direct short to ground on 25 ohms won’t trip a breaker you have to be closer to 6-8 ohms depending on if it was 15 or 20 amp circuits.
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