Extended service

[Dale lee]

whenever someone quotes a code to me I make a habit of looking it up to verify. I was told on an extended service the disconnect has to be located within 25’. To my knowledge the only code that would apply say it has to be readily accessible…?

 

[tom baker]

Probably a state rule on length of unfused conductors inside a building.
By the way, kudos on looking up rules!

 

[Dale lee]

Thank you.

 

[Dale lee]

Also while I’m on questions… going to install a 60kw whole home generator w/ auto transfer switch. Due to xyz the easiest way to run it would be running utility power from load side of disconnect in a 400a meter main. I don’t see any issues with that. Only downside is if the main is shut off the generator would sense loss of utility and turn on, but code wise not sure there is anything wrong with that setup.

 

[tom baker]

Not clear on this
Running utility power on load side of main disconnect.,,
Maybe feeder on load side of service disconnect
Having service disconnect ahead of ATS means ATS does not have to be service entrance rated
By the 60 kw is very large generator for a dwelling unit. Did you do a load calc?

 

[electrofelon]

whenever someone quotes a code to me I make a habit of looking it up to verify. I was told on an extended service the disconnect has to be located within 25’. To my knowledge the only code that would apply say it has to be readily accessible…?

What is an "extended service"?

 

[Dale lee]

Not clear on this
Running utility power on load side of main disconnect.,,
Maybe feeder on load side of service disconnect
Having service disconnect ahead of ATS means ATS does not have to be service entrance rated
By the 60 kw is very large generator for a dwelling unit. Did you do a load calc?

Yes service disconnect

Not clear on this
Running utility power on load side of main disconnect.,,
Maybe feeder on load side of service disconnect
Having service disconnect ahead of ATS means ATS does not have to be service entrance rated
By the 60 kw is very large generator for a dwelling unit. Did you do a load calc?

sorry, yes feeder on load side of service disconnect. And 60 kw is rediculous considering 400a spit service, 200a panel x2 full of mainly 20a circuits as the entire house is gas. But the oss claims it’s “necessary”. Glad I’m not paying that bill. Not really sure what you mean by “doesn’t have to be service entrance rated”. Just was wondering if there is a code reason we could not do it.

 

[Dale lee]

What is an "extended service"?

The main panel is not in the same location as the meter…

 

[electrofelon]

The main panel is not in the same location as the meter…

I have run service conductors from a meter as far as about 800 feet, and run them a few hundred feet to the disconnect all the time.

 

[tom baker]

Yes service disconnect

sorry, yes feeder on load side of service disconnect. And 60 kw is rediculous considering 400a spit service, 200a panel x2 full of mainly 20a circuits as the entire house is gas. But the oss claims it’s “necessary”. Glad I’m not paying that bill. Not really sure what you mean by “doesn’t have to be service entrance rated”. Just was wondering if there is a code reason we could not do it.

You should look at the actual connected load, check the poco bills, Your connected load is likely 100 amps. A 60 KW is way oversized and will run unloaded, a generator needs to be loaded 60-75%, heat up the unit, oil, etc
A common generator ATS install method is to go straight from the meter to the ATS, so the ATS is called service entrance rated, Its a nicer install when there is a disconnect ahead of the ATS.
With your split service and 2 200 amp panels you will either need a 400 amp TS $$$, or put all the genny loads on one 200 A panel, with one ATS