Existing Service

[480sparky]

Not my concern either, but it does give a clue to the true load characteristics.

They base if off the information I supply them when I do a load calc and provide them with the results.

That's the first one I've seen. You should get the jackpot or something.

Yeah..... a free Mike Holt t-shirt? Cap? Greenlee 855 Smart Quad bender? C'mon, mods!..... What do I win? :grin:

 

[LarryFine]

I don't see why 'a 200 amp service' automatically provides sufficient power. I've done plenty of home that require a 400a service from the get-go. Just because it's a 200, doesn't mean there's an ample supply of extra capacity.

I don't see why 'a 200 amp service' automatically provides sufficient power. I've done plenty of home that require a 400a service from the get-go. Just because it's a 200, doesn't mean there's an ample supply of extra capacity.

I don't see why 'a 200 amp service' automatically provides sufficient power. I've done plenty of home that require a 400a service from the get-go. Just because it's a 200, doesn't mean there's an ample supply of extra capacity.

You gotta do something about them hiccups, man! :grin:

 

[resistance]

All (or mostly) electric appliances. Geo-thermal heating. In-floor electric heat. Hot tub. Whirlypool (maybe two!) with in-line heaters. 6-burner electric stove. Viking fridge & freezer. Double electric oven. 180 can lights. 60x120 heated shed w/ workshop. Well for water. Mechanical septic system. Pond aereator. The list goes on......

and on and on!






Yet, it's all basic (hint)!

 

[mivey]

You gotta do something about them hiccups, man! :grin:

He's just getting old and starting to repeat himself. He's just getting old and starting to repeat himself.

 

[iwire]

They base if off the information I supply them when I do a load calc and provide them with the results.

No, not in the way you seem to imply. :smile: They are not really looking at your load calcs as much as the type of applainces in the home. They base it on data they have on existing homes. I doubt one of those 400 amp services is actual needed, NEC required yeah maybe. :smile:

Did you look in on this thread Table 310.20....Your Service Drop. Where Charlie was talking about service loads.

Bob, that is exactly what we do. We set up a demand meter on a transformer and demand meters on each customer served by that transformer to get a relationship between the energy usage and the demand for a particular type of customer. This is done over long periods of time so we can develop an equation that will work for most installations of a certain rate and time of year. We have a couple of dozen installations spread over our system so we can achieve some semblance of accuracy and base our TLM (transformer load management) program on the data.

 

[Dennis Alwon]

Well that's far, far away from being an average or even a way above average house...that is off the charts!

Even so, we know that the NEC will produce an larger service than necessary to serve a home with stuff like that. I'm curious what size transformer that poco uses on such a house.

In some areas that is not off the charts and somewhat the norm. I have wired one with a 1200 amp service-- perhaps oversized but 400 amp is pretty much the norm around here on all electric houses that are 4000 sq.ft and up. Even with gas heat you still can have 4 or 5 a/c units along with everything else.

 

[peter d]

In some areas that is not off the charts and somewhat the norm. I have wired one with a 1200 amp service-- perhaps oversized but 400 amp is pretty much the norm around here on all electric houses that are 4000 sq.ft and up. Even with gas heat you still can have 4 or 5 a/c units along with everything else.

And again, I would say that the NEC would produce a service calculation much larger than the true load characteristics.