Wrong question. No one here is going to consider a 125A box when a 200A box
is the standard, costs no more to install, has plenty of room for expansion,
and is a negligble increase in price over a 125A.
It's partially figured by square feet. It also matters if you have electric
range, clothes dryer, AC, etc. Typically a small house with gas appliances
is fine with a 100 amp service, but if you intend to expand or get major
electric appliances, you may want to consider a 200 amp service. The price
difference between the two is generally only a few hundred dollars. How did
you make out with your open circuit problem?
Where I live, and work,(as an electrical contractor) electrical services,
regardless of their amperage, don't install themselves, and while the price
of installing a service is determined not only by the equipment being
installed but also by particulars of each job, in general a 200 amp overhead
service costs about three hundred dollars more than a 100 amp service. We
also don't have a "standard" service, most new houses do have 200 amp
services installed, but the NEC requires a minimum of 100 amps, and for a
very small house with gas cooking 100 amps should be more than adequate
For a house that small, you should be able to easily get by with 125A
service, even it's total-electric with central A/C. However, 200A would be a
nice feature to have when you eventually sell the house. The *labor* cost of
installation should be almost exactly the same, so the cost difference should
be pretty much just the difference in the cost of the panels. Add another five
or ten bucks, maybe, to account for needing to use heavier service entrance
conductors for the 200A service.
Doug Miller (alphageek at milmac dot com)
Depending on the state and the locality you may be required to have a
larger service than the national minimum. Some of the counties I work
in require a 150 ampere minimum service to detached dwellings. It is
worth your time to check with the local electrical inspectors office.
"This alternating current stuff is just a fad. It is much too dangerous
It's figured by what you estimate the electrical demand to be,
and then again by how many different circuts you want. What's the
price difference, and what size wire is your service drop?
The only reason I can think of to go with a smaller panel than
you can is if the price difference is a deal-breaker, or if
the larger size requires a new service drop and the smaller one
I'm of the "if it ain't broke, don't fix it" school. The OP might
find the upgrade requires bringing everything else up to current code,
which could get very expensive. A bit of conservation could pay big
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If you have electric Dryer, AND central a/c, AND an electric range, then go
all the way to 200. If you have only 1 or 2 of these 3 items, then you can
probably go less. But why? Just go the 200 and be done.
"bubblegummom" < email@example.com> wrote in message
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