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Posted by on October 22, 2009, 2:31 pm
> On Oct 22, 1:19 pm, spamb...@milmac.com (Doug Miller) wrote:
> > >> This came up elsewhere and I am just curious about what the answer i=
s.
> > >> If someone has a main service panel with a 200-amp main breaker, how
> > >> many amps of service can that panel actually service?
> > >> I am probably not wording this correctly, but I thought that I
> > >> remember something about a 200-amp main breaker actually being okay
> > >> for 400 amps of service since there are two separate circuits coming
> > >> in (a 240-volt service split into two 120-volt circuits in the panel
> > >> box).
> > >It all depends on voltage. A 220 amp service can in theory (you are no=
t
> > >supposed to use more than 80%)
> > Not so. You misunderstand the 80% rule.
> > >supply 200 amps at 240 volts OR 400 amps at
> > >120 volts or any combination of the above.- Hide quoted text -
> > - Show quoted text -
> plus the 200 amp dual breaker can and will carry a percentage more
> indefinetely
> I had a friend who had the largest outdoor light display in the area,
> the power company loved him:(
> checking the legs of his main service, it exceeded 200 amps on either
> side.
> he couldnt run his dishwasher, washer dryer, or even a hair dryer as
> his wife found out when the lights were on..........
> her hair dryer blacked out the total home.
> when his kids got bigger he quit decorating......... but geez it was
> beautiful- Hide quoted text -
> - Show quoted text -
Aside from the 80% rule, you can't get 400 amps out of a 200amp
service. The service consists of two hots, and a neutral. That
means with a 200 amp service you can get 200 amps at 240V flowing
between the two hots. Or you could get say 150 amps at 240V plus 50
amps at 120V. /In the latter case you have 200 amps flowing on one
hot, 150 on the other hot, and 50 on the neutral.
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> If someone has a main service panel with a 200-amp main breaker, how
> many amps of service can that panel actually service?
> I am probably not wording this correctly, but I thought that I
> remember something about a 200-amp main breaker actually being okay
> for 400 amps of service since there are two separate circuits coming
> in (a 240-volt service split into two 120-volt circuits in the panel
> box).