30 AMP OPS

[Gregory OConnor]

Bill, thanks for clearing that up. Jeff M also pointed out that the
50amp220 provides 100 amp110. I'm gonna turn all the lights on at
home to see if I have 800amps on my 400amp220 box.

Bill asked twice the risk of tripping a breaker" as you have more power
available to use.>

when you tie both legs of your panel to the same 110 30 amp, all 110
in the bus will run past the 30 amp breaker. Things like chargers
and hotwaterheaters and a fridge that auto on and off are hard to
manage. 30 amp hookup limiting half of the bus is a design and a
cheater is a cheater. If you pay for 30 amps and use another leg that
cheater is a theifer.

Bill stated can flow around the windings in some cases>

Dont know that it does or can but I dont think it is good to open any
220 circuit when you only have 110 avaliable. I have seen a cooktop
control dial bleed electricity to the dead leg and act like a dimmer
switch to all the appliances on that leg. this could have the same
results that John warns us of .

I had an instance where one leg went out in a rental. When the
electric cooktop220 was turned on and all the lights on the other leg
dimmed on via the range control.

ground/neutral connection. In our homes, the ground and neutral are
bonded together, and in our coaches they are not. When you are tied
into the power system, the bonding will take place at the park
receptacle.> Why are they not bonded together in the bus? I would
have never known this if you didnt point it out. (being
unknowledgable can really get someone killed)

GregoryO'Connor
94ptRomolandCa
accomplished and certified ditch digger



--- In WanderlodgeForum@yahoogroups.com, Wilhelmus Schreurs
wrote:
>
> Hi all:
>
> The wiring that we have in our homes and also in our BB is all
single phase wiring. Very rarly would one find 3 phase wiring other
than in either a commercial or industrial application.
> We use single phase power, with two legs.
>
>
> "with your 30amp 220 volt breaker at the house you have 30 amp
available on each leg (red,black) but not at the same time, you can
draw 30 amps through that breaker total. Ie: 30 on one leg and zero
on the other, or 15 and 15, or run a total of 30*110 =- 3300 watts.
By design the breaker will trip if you draw more than 30 amps in any
combination.
>
> This is false. In a 220 volt circuit, in which you have 2 legs,
it is possible to draw a total of 30 amps * 220 volts for a total of
6600 watts. HOWEVER, each LEG is only designed to carry a total of
30 amps * 110 volts or 3300 watts., so if one leg is overloaded it
will trip both breakers.
>
> Pete: you mention about a cheater cable, well there are all sorts
of types of cheater cables, you need to know the type that you
require.
> Ie: if you have a cheater cable that you can connect into two 30
amp circuits at a trailer park, it is possible to get 30 amps with
220 volts, or in other words, if your stove is 220 volts you can use
it. The problem here is, it might be possible to have both 30 amps
on the same leg, and this would give you 60 amps * 110 volts, but no
220 volts.
> : Even if you can hook both legs of the coach up to a pedestal at
a park, the park receptacles must be on different legs for you to get
220 volt in the coach for ac and such. Cheaters tie both sides of
the coach panel together into a common leg. You end up with twice
the risk of tripping a breaker. 220 volt applieances that get turned
on may act like a cheater as current may flow around the windings and
or rheostants
>
> As I mentioned above, cheaters can tie both sides of the coach
panel together, but it might not as well, this depends on the park
receptacle if they are on separate legs or not. I cannot understand
the statement about "you end up with twice the risk of tripping a
breaker" as you have more power available to use. Also maybe Greg
can shed some light on where the current can flow around the windings
in some cases.
>
> : to trip a 50 amp breaker you can draw 51 amps off one leg etc
etc".
> The circuit breakers we have in our homes, and what we use in our
BB, are called "thermal breakers". They trip with a function of
heat, which is produced by amperage. Different types of breakers can
have a different curve characteristic to them, ie: for a 50 amp
breaker it might take 52 amps at 3 or 4 minutes to trip, 60 amps – 30
seconds, 75 amps instant. Other breaker could be slower or faster.
>
> : Typically, the 110 volt light over the table use a "dimmer"
switch. In the "maximum dim" position, the light will not
illuminate. Yet, should one come in contact with the hot wire of the
light fixture, a nasty/possibility fatal surprise awaits. 110v is
present. The dimmer has simply temporarily reduced the amperage
below the amount required for illumination, but the 110
volt "electrical potential" is fully available, just like a duplex
(plug in) wall socket.
> John has a very good point here, and did you know that being
unknowledgable can really get you, or someone else killed
>
> One main difference between our homes and our BB coaches is the
ground/neutral connection. In our homes, the ground and neutral are
bonded together, and in our coaches they are not. When you are tied
into the power system, the bonding will take place at the park
receptacle. So when you are changing any of your light switches or
receptacles, pay particular attention that the ground and neutral
does not touch or get mixed up, if it does, the body/chassis of your
coach could become live.
>
> Good point John: even as an accomplished and certified
electrician, I would not want to mix and match power sources either.
>
> Pete: If you have 30 amps 110 volts coming into your coach, and
you only want to use one burner of your stove, assuming your stove
burner is 110 volts, go for it. You might have to reduce other loads
on in the coach for the time you are using the burner.
>
> Gosh I love this electrical stuff.
>
> Bill
> 84FC35SB
> Terrace, BC
>
>
>
>
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