Dave is on to the REAL problem. I learned this when I installed a
15KW generator (We are in a similar situation, end of the line with
branches everywhere) and I wanted to power the entire house.
During startup our A/C system pulled something like 600 amps for a
VERY brief time, after that it was an easy thing to keep going. Have
the A/C tech install a "Hard start kit" which from what I can see is
nothing more than a big capacitor but it makes a big difference.
Also, we installed a cut off switch, think Frankenstein here, that
disconnects the house from any external power. Keeps the electric
folk safe too..
Lester
On Jan 29, 2007, at 3:15 PM, Dave G. wrote:
> First, If you don't pull the main breaker then you are trying to power
> up simultaneously all items that are "ON" in the house... but you
> already knew that :-))
>
> Second, your AC and refrigerator motors may only draw about 20Amps
> once
> running, but for a few millisecondss, they suck a whole lot of current
> on start-up. Look at your 12V battery when you crank the starter...
>
> 4 KW max only gives you 18Amps max @ 220V.
> The longer your connecting leads the higher the resistance and the
> more
> voltage drop you get which increases the current demand which
> increases
> the voltage drop, etc., etc., etc.....
> One 100W lamp almost draws 1 Amp @ 110V
>
> You probably need to check on what is the peak current the generator
> can provide for a second or two...
>
> But I would definitely pull the main breaker
>
> Dave G.
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