Service ready Automatic transfer switchs

[WV Sparktition]

OK, again i am revisiting an argument again with my boss.
We purchase Square D service ready ATS's when we install generators. In these enclosures, it has two separate breakers, along with the transfer contactor. OK one breaker, feeds in line voltage from service meter, and if power is present, feeds through to the load side terminals, to a panel. Todays was a 400amp service, which in this case load side fed a trough, then 3 panels from there. there is no need to touch into feeding the generator because it is no question, four wire ran to it. But my boss constantly persists that this equipment is not a service disconnect(however if i throw the line load breaker, the entire house service goes off) so we do NOT need to feed separate grounded conductors and grounding to(in this case) the trough inside. The original service, before the generator and ATS, the neutral bonded the grounding conductor, via a bonding hub mounted in the bottom of the trough. But with all this, he made me bond the grounding, and grounded conductors via a bonding jumper in the ATS, supplied with the ATS. What code articles are needed to back up my argument.

History, my boss has had his masters(unrestricted) license for 15 years, i have had my junior or journeyman license for 5. We butt heads alot because he likes to cut corners when he misses something in a bid, and its gunna cost him money.

Any response is great

P.S.: going for masters and contractors license in April...probably already needed to know this...

 

[augie47]

Not sure I completely follow, but the first disconnect/overcurrent device is your service disconnect. With a service rated ATS (with disconnect) that would be your service disconnect and your grounded-grounding Bond would be at that point. After that (wireway, panel, etc) there should be no grounded-grounding connection, and theee should be grounding jmeans other than by the grounded (neutral) conductor.

 

[WV Sparktition]

That is my argument to him, and he says that the ATS is not the service disconnect. I just wanted to have a article(s) to back that up

 

[augie47]

If it is not the service disconnect, then per 230.82, it could not be installed ahead of the service disconnect.

 

[WV Sparktition]

i saw that and thought of that btu the only thing i saw was that it said emergency standby systems, and i thougt they might mean ATS

 

[ceb58]

Not sure I completely follow, but the first disconnect/overcurrent device is your service disconnect. With a service rated ATS (with disconnect) that would be your service disconnect and your grounded-grounding Bond would be at that point. After that (wireway, panel, etc) there should be no grounded-grounding connection, and theee should be grounding jmeans other than by the grounded (neutral) conductor.

I agree it's kinda hard to follow but if the SR transfer switch is the first disconnecting means from the meter then the grounded (neutral) and ground would be bonded in the ATS. From there every thing would be separate. Is there separate disconnecting means between the meter and the ATS?

 

[LarryFine]

KC, as the other guys said, you're correct.

I've added service-rated ATS's as well as a separate main and a non-rated ATS, and I relocate the bonding to the new main, and run separate neutral and EGC in or through the TS, and separate everything in the panel.

The inspector (he was a new guy to me) was pleasantly surprised that I got it all right the first time. He said he almost always has to fail ATS installs on the first inspection. Doesn't your boss's work get inspected?

 

[benaround]

But with all this, he made me bond the grounding, and grounded conductors via a bonding jumper in the ATS, supplied with the ATS. What code articles are needed to back up my argument.

QUOTE]

KC,

The N/G bond has to take place in the ATS in this case, and ATS to trough to panels the

N and the G need to be seperate.

 

[e57]

History, my boss has had his masters(unrestricted) license for 15 years, i have had my junior or journeyman license for 5. We butt heads alot because he likes to cut corners when he misses something in a bid, and its gunna cost him money.

Yeah - happens... All of it...

But still not sure I understand your service arrangement.

There is a breaker/fuse in a seperate enclosure between your ATS and the POCO?

The original service, before the generator and ATS, the neutral bonded the grounding conductor, via a bonding hub mounted in the bottom of the trough. But with all this, he made me bond the grounding, and grounded conductors via a bonding jumper in the ATS, supplied with the ATS. What code articles are needed to back up my argument.

Is your arguement that it is or isn't an SDS? See 250.30, and 250.24A5