Posted by randall.reed on November 21, 2006, 5:27 pm
Howdy from Houston everyone...
I purchased a 20KW from Generac today - looking forward to getting it
installed. However I may have made a mistake. I bought the genset
with a 100A ATS with service disconnect to complement a whole house
backup. My question is, should I have purchased the 200A ATS with
service diconnect since my main breaker is 200A? I'm reading and some
people say yes, and others say no...
Please help - I appreciate your opinions and possible experience on the
matter.
Posted by Neon John on November 21, 2006, 5:55 pm
Since the transfer switch has to handle the whole house load under
normal conditions too, you need the 200 amp one since you already have
200 amp service.
John
On 21 Nov 2006 14:27:31 -0800, randall.reed@gmail.com wrote:
>Howdy from Houston everyone...
>I purchased a 20KW from Generac today - looking forward to getting it
>installed. However I may have made a mistake. I bought the genset
>with a 100A ATS with service disconnect to complement a whole house
>backup. My question is, should I have purchased the 200A ATS with
>service diconnect since my main breaker is 200A? I'm reading and some
>people say yes, and others say no...
>Please help - I appreciate your opinions and possible experience on the
>matter.
---
John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
Don't let your schooling interfere with your education-Mark Twain
Posted by randall.reed on November 22, 2006, 12:18 pm
Just What I thought. I'll go ahead and get the 200A
Thanks John!
Neon John wrote:
> Since the transfer switch has to handle the whole house load under
> normal conditions too, you need the 200 amp one since you already have
> 200 amp service.
> John
> On 21 Nov 2006 14:27:31 -0800, randall.reed@gmail.com wrote:
> >Howdy from Houston everyone...
> >
> >I purchased a 20KW from Generac today - looking forward to getting it
> >installed. However I may have made a mistake. I bought the genset
> >with a 100A ATS with service disconnect to complement a whole house
> >backup. My question is, should I have purchased the 200A ATS with
> >service diconnect since my main breaker is 200A? I'm reading and some
> >people say yes, and others say no...
> >
> >Please help - I appreciate your opinions and possible experience on the
> >matter.
> ---
> John De Armond
> See my website for my current email address
> http://www.neon-john.com
> Cleveland, Occupied TN
> Don't let your schooling interfere with your education-Mark Twain
Posted by Jens Kr. Kirkebø on November 30, 2006, 4:42 pm
>Since the transfer switch has to handle the whole house load under
>normal conditions too, you need the 200 amp one since you already have
>200 amp service.
Its quite funny how inefficient the american power grid is. 200A for a
house ? Yikes. That's some _thick_ cables, yes ?
In Sweden they usually have 20A service, but since it's 400V 3-phase
it delivers _more_ power than 200A one-phase 110V...
Posted by Solar Flare on November 30, 2006, 5:58 pm
Not quite there, Swedey
American power is 200A (can be 60A - 800A) at 120/240 volt supply.
That means two phases at 120 v.
The usual service now is 200A @ 240 volts = 48 kVA
Your service mentioned is 20A x 400V x SQRT(3) = 13.8kVA or about 1/4
the capacity.
The math education in America is also better...LOL
>>Since the transfer switch has to handle the whole house load under
>>normal conditions too, you need the 200 amp one since you already
>>have
>>200 amp service.
> Its quite funny how inefficient the american power grid is. 200A for
> a
> house ? Yikes. That's some _thick_ cables, yes ?
> In Sweden they usually have 20A service, but since it's 400V 3-phase
> it delivers _more_ power than 200A one-phase 110V...
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>I purchased a 20KW from Generac today - looking forward to getting it
>installed. However I may have made a mistake. I bought the genset
>with a 100A ATS with service disconnect to complement a whole house
>backup. My question is, should I have purchased the 200A ATS with
>service diconnect since my main breaker is 200A? I'm reading and some
>people say yes, and others say no...
>Please help - I appreciate your opinions and possible experience on the
>matter.
---