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Posted by Aaron Fude on June 3, 2008, 3:40 am
Hi,
If my master breaker consists of two 100amp switches, does that mean I
have 200amps to play with.
(When I was remodeling the bathroom, before I knew anything about all
this, I had several electricians come in. Most of them said I don't
have enough current coming in and that I should upgrade to 150 or 200
amps. Only one said "I have no idea what they are talking about, you
have plenty of amps coming in." So now I'm intrigued if the rest were
blantantly deceiving me or just a little bit, since the bathroom has
been finished and I'm not having any problems with A/C running and a
house full of guests.)
Many thanks in advance,
Aaron
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Posted by hallerb@aol.com on June 3, 2008, 7:08 am
> Hi,
>
> If my master breaker consists of two 100amp switches, does that mean I
> have 200amps to play with.
>
> (When I was remodeling the bathroom, before I knew anything about all
> this, I had several electricians come in. Most of them said I don't
> have enough current coming in and that I should upgrade to 150 or 200
> amps. Only one said "I have no idea what they are talking about, you
> have plenty of amps coming in." So now I'm intrigued if the rest were
> blantantly deceiving me or just a little bit, since the bathroom has
> been finished and I'm not having any problems with A/C running and a
> house full of guests.)
>
> Many thanks in advance,
>
> Aaron
yeah you do have 200 amps total, but a upgraded 200 amp service gets
you a total of 400 amps.
we have never tripped our old 100 amp main but ran out of spaces for
breakers.... so upgraded.
remodel issue probably involved space capacity as much as amp capacity
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Posted by EXT on June 3, 2008, 8:55 am
Shortage of breaker space can be solved with a branch panel, get one that
uses the same breakers as your main panel so that they can be moved as
needed. A lot cheaper than upgrading your service entrance equipment.
> Hi,
>
> If my master breaker consists of two 100amp switches, does that mean I
> have 200amps to play with.
>
> (When I was remodeling the bathroom, before I knew anything about all
> this, I had several electricians come in. Most of them said I don't
> have enough current coming in and that I should upgrade to 150 or 200
> amps. Only one said "I have no idea what they are talking about, you
> have plenty of amps coming in." So now I'm intrigued if the rest were
> blantantly deceiving me or just a little bit, since the bathroom has
> been finished and I'm not having any problems with A/C running and a
> house full of guests.)
>
> Many thanks in advance,
>
> Aaron
yeah you do have 200 amps total, but a upgraded 200 amp service gets
you a total of 400 amps.
we have never tripped our old 100 amp main but ran out of spaces for
breakers.... so upgraded.
remodel issue probably involved space capacity as much as amp capacity
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Posted by RBM on June 3, 2008, 3:26 pm
> Hi,
>
> If my master breaker consists of two 100amp switches, does that mean I
> have 200amps to play with.
>
> (When I was remodeling the bathroom, before I knew anything about all
> this, I had several electricians come in. Most of them said I don't
> have enough current coming in and that I should upgrade to 150 or 200
> amps. Only one said "I have no idea what they are talking about, you
> have plenty of amps coming in." So now I'm intrigued if the rest were
> blantantly deceiving me or just a little bit, since the bathroom has
> been finished and I'm not having any problems with A/C running and a
> house full of guests.)
>
> Many thanks in advance,
>
> Aaron
yeah you do have 200 amps total, but a upgraded 200 amp service gets
you a total of 400 amps.
we have never tripped our old 100 amp main but ran out of spaces for
breakers.... so upgraded.
remodel issue probably involved space capacity as much as amp capacity
The method of determining your service size has little to do with adding up
the amperage of multiple main breakers, if that is what you're doing. It is
determined by the service entrance conductor size. a 200 amp 120/240 volt
service will be at least 4/0 aluminum or 2/0 copper, and a 100 amp 120/240
volt service will be at least #2 aluminum or #4 copper
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Posted by Joseph Meehan on June 3, 2008, 7:43 am
> Hi,
>
> If my master breaker consists of two 100amp switches, does that mean I
> have 200amps to play with.
>
...
> Many thanks in advance,
>
> Aaron
Not exactly. It means you have 100 amps at 240V or Two 100 amp
circuits at 120V it does not mean you can put over 100 amps at 120V on one
leg the service. If everything were on one side of the service and you were
using 110 amps total at 120V it should blow the breaker.
You do have 200 amps to play with if your follow the rules.
--
Joseph Meehan
Dia 's Muire duit
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