30 AMP OPS

[John Suter]

Hi again, Leroy.

We probably need to modify a few minor items.
Generically, the 50 amp male shore connection is
110-120v, not quite the same 220-240v as you likely
have in your home at your electric dryer and that is
typically why the male-female plugs for the dryer are
different from the ones you find in the Bird;
although, if the pedestal legs feeding the Bird are
out of phase with one another, 220-240V will be
present when measured from leg 1 to leg 2. (This "out
of phase" condition which results in 240V should not
be confused with "3-phase, 208V," although the
engineering concept is similar; 3-phase equipment,
mostly motors, must be specifically engineered to run
on three-phase current). Nevertheless, I am unaware
of any Birds 2004 or earlier that require, or use,
240V for appliances, although the generator will/does
produce it.

Your hypothetical #1, accomplishes what the normally
BB-provided 30A-male to 50A-female connector is
designed for, except it is internally wired to feed
both legs of 50A male and thus both legs of the main
panel, as long as no power is detected at the aux
connection. On many Birds, when power is detected at
the aux, one leg of the main panel will automatically
transfer to become powered solely by the aux feed,
while the other remains unchanged and fed thru the 50A
cord, however it is fed.

> 1. Purchase a 240 female to fit my permanent 240
> male shore cable
> and wire one leg in it to a 30amp shore plug. That
> should give me 30
> amps on leg 1 then plug my 30amp aux connection into
> either another
> 30amp shore power or 20amp shore power to get 30amps
> or 20 amps
> respectively on leg 2.

Best regards,

John Suter


--- jwasnewski wrote:

> Hi Folks: Thanks to all of you who responded to my
> inquiry. I think
> each of you have it correct, now I would like a
> double check,
> please. Been out at the bus for cleaning,
> polishing, inspecting
> etc. I studied my maunal on 30 AMP ops. It's
> rather vague, but here
> is what I think.
> I have a 30 amp aux connection which powers my Leg
> 2. My 50amp 240
> permanent connector powers everything, both 120
> legs. That should be
> 100amps. The manual calls for having adaptors which
> I do not have.
> I think I can do the following:
>
> 1. Purchase a 240 female to fit my permanent 240
> male shore cable
> and wire one leg in it to a 30amp shore plug. That
> should give me 30
> amps on leg 1 then plug my 30amp aux connection into
> either another
> 30amp shore power or 20amp shore power to get 30amps
> or 20 amps
> respectively on leg 2. In my configuration, I think
> it is the only
> way to get 2 legs of any kind of power. My
> inverter/charger runs off
> leg 1. Then I gotta really manage power in the
> summer.
>
> 2. The 240amp female has a ground, a
> white(neutral) X & Y
> connections representing 2 120 legs, I think. I
> would need to
> determine whether X or Y on my permanent shore power
> cable powers leg
> 1 in the bus when I wire it to a 30 amp plug.
>
> I do not plan to use this configuration but I would
> like to be ready
> to do so if needed.
>
> I handle 12v very well, 120v not as well. Does the
> foregoing sound
> correct?
>
> So that very faint humming noise I here when
> everyone is asleep is
> the transfer switch. I was about to go searching for
> the source. Now
> I won't.
>
> Thanks again.
>
> Leroy Eckert
> 1990WB40
> Niceville, FL
>
>
>
>
>
>


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