30 AMP OPS

[Leroy Eckert]

John:

OK, I think I have it.

Everything works in my coach, have had very few problems other than light bulbs
etc. I didn't want to start plugging in cables and create stray voltage and
cremate one or more of a gazillion relays in the bus. I'm sure that could
happen and cause me all kinds of %$#@.

Strange things can happen. Short story. Four years ago I purchased a 56" HD
wide screen TV. Didn't need it but thought I did. Living in an area where
electrical storms are common, you live there also, I plugged it into a constant
voltage transformer and a surge suppression device. Two months ago we had one
of those storms. It cremated the transformer, the surge suppresion device and
the TV. Fortunately, I purchased an extended warranty. The $69.00 pool TV on
24/7 and doubles as a night light outside made it through. Go figure. I guess
what I'm saying is, my beautiful coach is without warranty and I am very
careful.

As always, the forum has come through again with its knowledge and experience.
Very educational. Hopefully it will help others.

This forum is like Fox news. You report, we decide.

Thanks again.

Leroy Eckert
1990WB-40
Niceville, FL







----- Original Message -----
From: John Suter
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, August 13, 2006 6:15 PM
Subject: Re: [WanderlodgeForum] 30 AMP OPS


Hi Leroy,

> Thanks, If I understand correctly the 50amp factory
> male has 4 wires, two legs, one shared neutral and a
> ground.

Correct.

> If the 30 amp to 50 amp female were to
> power both bus legs the female 50 amp wiring
> connection would be ground, neutral and black ( 3rd
> wire) split to the two other posts.

Correct. This is the short (maybe 15" connector BB
normally provides).

> That would give
> me 15 amps per leg?

No, that will provide 30 amps total for both legs,
any way you wish to distribute it over the 2 legs.
0-30, 30-0, 15-15, etc.

> Like I said I have never
> really studied 110 and phases and such. Guess I
> better get at it, or purchase a 50amp to 30 amp
> connector so that I can get 2 legs in my
> configuration if I ever need it.

Correct, the easiest way, and the most used as well.
I assume you already have the other required
connection: a 30A female to plug into the coach aux
connection and the 30 male plug that is at its other
end. Usually, BB has wrapped the female end in yellow
tape to differentiate it.

> It really doesn't
> make sense for leg one to go away if the aux power
> leg two is sensed but it appears that is the way it
> is wired.

Well, to many it does, as it permits 60 amps to be
provided when the 50A (really 100A) is not available.
With this methodology, each leg has up to 30 amps for
a total of up to 60A. Otherwise, 30 is shared between
both legs, as explained above. Nevertheless, that is
the way most BB automatically-switched-systems work.

> Thanks for the help. If you can figure
> it out I think iI can wire it.

Again, you don't have to wire anything. Just
purchase the 30 male to 50 female connection that BB
normally provides and apparently you did not receive.

> Leroy Eckert
> 1990WB40
> Niceville, FL

John Suter
Jacksonville, FL

> ----- Original Message -----
> From: John Suter
> To: WanderlodgeForum@yahoogroups.com
> Sent: Sunday, August 13, 2006 4:15 PM
> Subject: Re: [WanderlodgeForum] 30 AMP OPS
>
>
> 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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