Table 310.20....Your Service Drop.

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stickboy1375 said:
Frizbeedog, go get your amprobe on your service and tell me you really need a 200 amp service. Its so overkill its not funny....
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Going along with this thread, a typical home with a 200 amp service might only get connected to a 15 or 25 kva transformer. Multiple homes might get connected to a 50. I've been looking at quite a few pole transformers lately and a 50 kva transformer can serve a block full of smaller homes and 3-4 larger sized homes.
 
peter d said:
. . . a 50 kVA transformer can serve a block full of smaller homes and 3-4 larger sized homes. . .
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We typically serve six to eight homes (50% total electric) with a 50 kVA pad mount transformer. Our pole mounted 50 kVA transformers (new customers are very rare) usually serve about 15 customers and most are total electric except for gas heat.

We have a lot of new homes with heat pumps since they produce a therm of heat for less money that gas. The optimum is a heat pump with gas backup. :smile:
 
charlie said:
We typically serve six to eight homes (50% total electric) with a 50 kVA pad mount transformer. Our pole mounted 50 kVA transformers (new customers are very rare) usually serve about 15 customers and most are total electric except for gas heat.

We have a lot of new homes with heat pumps since they produce a therm of heat for less money that gas. The optimum is a heat pump with gas backup. :smile:
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Thanks for that info. :) My statements were just based on my uninformed observations of typical residential distribution in National Grid and Northeast Utility territory.
 
charlie said:
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.
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I have seen this equipment in NY, but I assumed they were checking individual customers to verify possible thefts of service.
 
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